/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --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 15:59:09,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:59:09,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:59:09,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:59:09,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:59:09,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:59:09,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:59:09,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:59:09,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:59:09,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:59:09,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:59:09,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:59:09,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:59:09,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:59:09,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:59:09,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:59:09,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:59:09,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:59:09,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:59:09,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:59:09,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:59:09,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:59:09,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:59:09,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:59:09,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:59:09,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:59:09,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:59:09,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:59:09,808 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 15:59:09,823 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:59:09,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:59:09,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:59:09,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:59:09,825 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:59:09,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:59:09,826 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:59:09,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:59:09,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:59:09,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:59:09,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:59:09,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:59:09,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:59:09,827 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:59:09,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:59:09,827 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:59:09,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:59:09,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:59:09,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:59:09,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:59:09,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:59:09,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:59:09,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:59:09,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:59:09,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:59:09,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:59:09,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:09,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:59:09,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:59:09,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 15:59:10,153 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:59:10,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:59:10,175 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:59:10,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:59:10,179 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:59:10,181 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-07-21 15:59:10,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b820a6443/1970699128f94403b35bbea91f1ae89b/FLAG6a1aa03d8 [2020-07-21 15:59:10,734 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:59:10,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-07-21 15:59:10,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b820a6443/1970699128f94403b35bbea91f1ae89b/FLAG6a1aa03d8 [2020-07-21 15:59:11,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b820a6443/1970699128f94403b35bbea91f1ae89b [2020-07-21 15:59:11,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:59:11,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:59:11,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:59:11,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:59:11,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:59:11,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f3d85e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11, skipping insertion in model container [2020-07-21 15:59:11,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:59:11,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:59:11,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:59:11,365 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:59:11,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:59:11,394 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:59:11,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11 WrapperNode [2020-07-21 15:59:11,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:59:11,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:59:11,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:59:11,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:59:11,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (1/1) ... [2020-07-21 15:59:11,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:59:11,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:59:11,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:59:11,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:59:11,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (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 15:59:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:59:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:59:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 15:59:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 15:59:11,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:59:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:59:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:59:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 15:59:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 15:59:11,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:59:11,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:59:11,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:59:11,830 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:59:11,831 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:59:11,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:59:11 BoogieIcfgContainer [2020-07-21 15:59:11,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:59:11,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:59:11,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:59:11,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:59:11,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:59:11" (1/3) ... [2020-07-21 15:59:11,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241009e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:59:11, skipping insertion in model container [2020-07-21 15:59:11,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:11" (2/3) ... [2020-07-21 15:59:11,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241009e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:59:11, skipping insertion in model container [2020-07-21 15:59:11,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:59:11" (3/3) ... [2020-07-21 15:59:11,861 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-07-21 15:59:11,892 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:59:11,912 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:59:11,934 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:59:11,961 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:59:11,961 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:59:11,961 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:59:11,962 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:59:11,962 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:59:11,962 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:59:11,962 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:59:11,962 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:59:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 15:59:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 15:59:11,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:11,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:11,988 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:11,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 15:59:12,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:12,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283871324] [2020-07-21 15:59:12,003 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 15:59:12,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:12,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:12,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:59:12,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:12,182 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 15:59:12,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:59:12,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283871324] [2020-07-21 15:59:12,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:59:12,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:59:12,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063497975] [2020-07-21 15:59:12,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:59:12,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:12,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:59:12,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:59:12,206 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 15:59:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:12,324 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 15:59:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:59:12,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 15:59:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:12,339 INFO L225 Difference]: With dead ends: 44 [2020-07-21 15:59:12,339 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 15:59:12,343 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 15:59:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 15:59:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 15:59:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:59:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 15:59:12,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 15:59:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:12,395 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 15:59:12,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:59:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 15:59:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:59:12,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:12,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:12,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:12,612 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:12,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 15:59:12,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:12,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613621971] [2020-07-21 15:59:12,615 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 15:59:12,643 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:59:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:12,689 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 15:59:12,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:59:12,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613621971] [2020-07-21 15:59:12,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:59:12,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:59:12,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035235101] [2020-07-21 15:59:12,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:59:12,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:12,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:59:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:59:12,698 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 15:59:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:12,764 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 15:59:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:59:12,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:59:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:12,767 INFO L225 Difference]: With dead ends: 36 [2020-07-21 15:59:12,767 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 15:59:12,769 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 15:59:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 15:59:12,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 15:59:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:59:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 15:59:12,779 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 15:59:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:12,780 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 15:59:12,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:59:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 15:59:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 15:59:12,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:12,782 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 15:59:12,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:12,992 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 15:59:12,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:12,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127020990] [2020-07-21 15:59:12,994 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 15:59:13,028 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:13,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:13,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:59:13,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:13,112 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 15:59:13,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:13,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:13,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:13,395 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 15:59:13,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127020990] [2020-07-21 15:59:13,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:13,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 15:59:13,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971537951] [2020-07-21 15:59:13,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:59:13,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:13,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:59:13,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:59:13,419 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2020-07-21 15:59:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:13,550 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 15:59:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:59:13,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 15:59:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:13,553 INFO L225 Difference]: With dead ends: 41 [2020-07-21 15:59:13,554 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 15:59:13,554 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 15:59:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 15:59:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 15:59:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 15:59:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 15:59:13,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 15:59:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:13,566 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 15:59:13,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:59:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 15:59:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:59:13,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:13,569 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 15:59:13,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:13,778 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:13,779 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 15:59:13,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:13,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366323128] [2020-07-21 15:59:13,781 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 15:59:13,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:13,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:13,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 15:59:13,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:13,896 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 15:59:13,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:14,029 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 15:59:14,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366323128] [2020-07-21 15:59:14,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:14,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-21 15:59:14,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197140907] [2020-07-21 15:59:14,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:59:14,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:59:14,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:59:14,033 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 15:59:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:14,118 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2020-07-21 15:59:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:59:14,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 15:59:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:14,125 INFO L225 Difference]: With dead ends: 49 [2020-07-21 15:59:14,125 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 15:59:14,126 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 15:59:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 15:59:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-07-21 15:59:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 15:59:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-07-21 15:59:14,150 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 27 [2020-07-21 15:59:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:14,156 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-07-21 15:59:14,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:59:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-07-21 15:59:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 15:59:14,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:14,160 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 15:59:14,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:14,376 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:14,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-07-21 15:59:14,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:14,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099408838] [2020-07-21 15:59:14,378 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 15:59:14,402 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:14,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:14,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:59:14,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:59:14,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:59:14,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099408838] [2020-07-21 15:59:14,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:14,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 15:59:14,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529409259] [2020-07-21 15:59:14,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:59:14,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:14,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:59:14,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:59:14,665 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 9 states. [2020-07-21 15:59:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:14,807 INFO L93 Difference]: Finished difference Result 75 states and 113 transitions. [2020-07-21 15:59:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:59:14,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 15:59:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:14,810 INFO L225 Difference]: With dead ends: 75 [2020-07-21 15:59:14,810 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 15:59:14,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:59:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 15:59:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-07-21 15:59:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 15:59:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-07-21 15:59:14,820 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2020-07-21 15:59:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:14,821 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-07-21 15:59:14,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:59:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-07-21 15:59:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 15:59:14,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:14,823 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 15:59:15,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:15,039 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:15,039 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 15:59:15,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:15,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355447824] [2020-07-21 15:59:15,041 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 15:59:15,077 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:15,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:59:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:15,160 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 15:59:15,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:15,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:15,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:15,425 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 15:59:15,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355447824] [2020-07-21 15:59:15,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:15,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 15:59:15,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864755399] [2020-07-21 15:59:15,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:59:15,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:15,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:59:15,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:59:15,430 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 11 states. [2020-07-21 15:59:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:15,611 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-07-21 15:59:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:59:15,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 15:59:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:15,613 INFO L225 Difference]: With dead ends: 39 [2020-07-21 15:59:15,613 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:59:15,614 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 15:59:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:59:15,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:59:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:59:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:59:15,616 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-07-21 15:59:15,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:15,617 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:59:15,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:59:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:59:15,617 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:59:15,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:15,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:59:16,170 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2020-07-21 15:59:16,174 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:59:16,174 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:59:16,174 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:59:16,174 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:59:16,175 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:59:16,175 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:59:16,175 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 15:59:16,175 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 15:59:16,175 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 15:59:16,175 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 15:59:16,175 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 15:59:16,176 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 15:59:16,176 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 15:59:16,176 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 15:59:16,176 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 15:59:16,176 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 15:59:16,176 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 15:59:16,176 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 15:59:16,177 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 15:59:16,177 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 15:59:16,177 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 15:59:16,177 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 15:59:16,177 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 15:59:16,177 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 15:59:16,178 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 15:59:16,178 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 15:59:16,178 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 15:59:16,178 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (let ((.cse0 (<= |fibo1_#in~n| fibo1_~n))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and (= 1 |fibo1_#t~ret0|) .cse0) (and (<= |fibo1_#in~n| 1) .cse0)))) [2020-07-21 15:59:16,178 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 15:59:16,178 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 15:59:16,178 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 15:59:16,179 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 15:59:16,179 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 15:59:16,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:59:16 BoogieIcfgContainer [2020-07-21 15:59:16,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:59:16,187 INFO L168 Benchmark]: Toolchain (without parser) took 5060.01 ms. Allocated memory was 143.7 MB in the beginning and 248.0 MB in the end (delta: 104.3 MB). Free memory was 101.3 MB in the beginning and 140.8 MB in the end (delta: -39.5 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. [2020-07-21 15:59:16,188 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 15:59:16,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.43 ms. Allocated memory is still 143.7 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 15:59:16,190 INFO L168 Benchmark]: Boogie Preprocessor took 128.31 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 91.4 MB in the beginning and 180.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 15:59:16,190 INFO L168 Benchmark]: RCFGBuilder took 321.87 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 167.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:59:16,191 INFO L168 Benchmark]: TraceAbstraction took 4336.78 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 166.4 MB in the beginning and 140.8 MB in the end (delta: 25.6 MB). Peak memory consumption was 71.7 MB. Max. memory is 7.1 GB. [2020-07-21 15:59:16,196 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.43 ms. Allocated memory is still 143.7 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.31 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 91.4 MB in the beginning and 180.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.87 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 167.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4336.78 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 166.4 MB in the beginning and 140.8 MB in the end (delta: 25.6 MB). Peak memory consumption was 71.7 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: 3.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 175 SDtfs, 112 SDslu, 695 SDs, 0 SdLazy, 356 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 273 GetRequests, 211 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s 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, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 41 PreInvPairs, 52 NumberOfFragments, 66 HoareAnnotationTreeSize, 41 FomulaSimplifications, 35 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 59 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 147 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 257 ConstructedInterpolants, 0 QuantifiedInterpolants, 15509 SizeOfPredicates, 14 NumberOfNonLiveVariables, 315 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 30/58 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...