/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:13:36,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:13:36,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:13:36,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:13:36,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:13:36,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:13:36,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:13:36,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:13:36,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:13:36,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:13:36,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:13:36,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:13:36,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:13:36,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:13:36,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:13:36,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:13:36,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:13:36,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:13:36,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:13:36,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:13:36,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:13:36,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:13:36,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:13:36,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:13:36,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:13:36,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:13:36,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:13:36,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:13:36,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:13:36,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:13:36,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:13:36,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:13:36,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:13:36,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:13:36,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:13:36,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:13:36,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:13:36,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:13:36,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:13:36,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:13:36,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:13:36,900 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 [2020-07-20 11:13:36,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:13:36,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:13:36,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:13:36,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:13:36,930 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:13:36,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:13:36,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:13:36,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:13:36,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:13:36,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:13:36,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:13:36,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:13:36,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:13:36,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:13:36,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:13:36,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:13:36,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:13:36,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:13:36,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:13:36,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:13:36,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:13:36,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:13:36,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:13:36,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:13:36,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:13:36,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:13:36,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:36,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:13:36,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:13:36,936 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 -> NOT_INCREMENTALLY [2020-07-20 11:13:37,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:13:37,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:13:37,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:13:37,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:13:37,260 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:13:37,261 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-20 11:13:37,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3280f9eb6/5aee58ca2dc54cf594d03c7d5d0b1018/FLAGad2e20f83 [2020-07-20 11:13:37,866 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:13:37,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-20 11:13:37,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3280f9eb6/5aee58ca2dc54cf594d03c7d5d0b1018/FLAGad2e20f83 [2020-07-20 11:13:38,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3280f9eb6/5aee58ca2dc54cf594d03c7d5d0b1018 [2020-07-20 11:13:38,224 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:13:38,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:13:38,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:13:38,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:13:38,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:13:38,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b6db34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38, skipping insertion in model container [2020-07-20 11:13:38,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:13:38,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:13:38,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:13:38,528 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:13:38,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:13:38,562 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:13:38,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38 WrapperNode [2020-07-20 11:13:38,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:13:38,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:13:38,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:13:38,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:13:38,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (1/1) ... [2020-07-20 11:13:38,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:13:38,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:13:38,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:13:38,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:13:38,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (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 [2020-07-20 11:13:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:13:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:13:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 11:13:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:13:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:13:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:13:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 11:13:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:13:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:13:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:13:39,040 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:13:39,040 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:13:39,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:13:39 BoogieIcfgContainer [2020-07-20 11:13:39,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:13:39,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:13:39,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:13:39,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:13:39,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:13:38" (1/3) ... [2020-07-20 11:13:39,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4245e8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:13:39, skipping insertion in model container [2020-07-20 11:13:39,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:38" (2/3) ... [2020-07-20 11:13:39,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4245e8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:13:39, skipping insertion in model container [2020-07-20 11:13:39,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:13:39" (3/3) ... [2020-07-20 11:13:39,061 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-07-20 11:13:39,075 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:13:39,087 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:13:39,103 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:13:39,134 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:13:39,135 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:13:39,136 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:13:39,138 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:13:39,138 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:13:39,138 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:13:39,138 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:13:39,138 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:13:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 11:13:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:13:39,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:39,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:39,168 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 11:13:39,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:39,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130560553] [2020-07-20 11:13:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:13:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:39,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:13:39,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:13:39,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:13:39,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130560553] [2020-07-20 11:13:39,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:13:39,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:13:39,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844092308] [2020-07-20 11:13:39,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:13:39,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:39,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:13:39,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:13:39,395 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 11:13:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:39,530 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 11:13:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:13:39,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:13:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:39,544 INFO L225 Difference]: With dead ends: 35 [2020-07-20 11:13:39,544 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 11:13:39,548 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 [2020-07-20 11:13:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 11:13:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 11:13:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:13:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 11:13:39,601 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 11:13:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:39,602 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 11:13:39,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:13:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 11:13:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:13:39,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:39,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:39,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:39,821 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:39,822 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 11:13:39,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:39,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119125060] [2020-07-20 11:13:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:13:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:39,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:13:39,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:13:39,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:13:39,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119125060] [2020-07-20 11:13:39,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:13:39,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:13:39,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771854593] [2020-07-20 11:13:39,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:13:39,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:39,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:13:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:13:39,917 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 11:13:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:39,982 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 11:13:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:13:39,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:13:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:39,984 INFO L225 Difference]: With dead ends: 27 [2020-07-20 11:13:39,984 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 11:13:39,986 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 [2020-07-20 11:13:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 11:13:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 11:13:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:13:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 11:13:39,999 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 11:13:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:39,999 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 11:13:40,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:13:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 11:13:40,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:13:40,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:40,004 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:40,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:40,219 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 11:13:40,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:40,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501238637] [2020-07-20 11:13:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:13:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:40,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:13:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:13:40,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:40,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 11:13:40,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501238637] [2020-07-20 11:13:40,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:40,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 11:13:40,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564827309] [2020-07-20 11:13:40,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:13:40,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:13:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:13:40,567 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 11:13:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:40,687 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 11:13:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:13:40,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 11:13:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:40,689 INFO L225 Difference]: With dead ends: 32 [2020-07-20 11:13:40,690 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 11:13:40,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:13:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 11:13:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 11:13:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 11:13:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 11:13:40,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 11:13:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:40,700 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 11:13:40,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:13:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 11:13:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:13:40,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:40,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:40,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:40,917 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:40,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 11:13:40,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:40,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248884405] [2020-07-20 11:13:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:13:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:40,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:13:40,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:13:40,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:41,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 11:13:41,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248884405] [2020-07-20 11:13:41,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:41,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 11:13:41,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723351858] [2020-07-20 11:13:41,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:13:41,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:13:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:13:41,152 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 11:13:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:41,232 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 11:13:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:13:41,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 11:13:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:41,236 INFO L225 Difference]: With dead ends: 37 [2020-07-20 11:13:41,236 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:13:41,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:13:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:13:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 11:13:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 11:13:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 11:13:41,247 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 11:13:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:41,247 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 11:13:41,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:13:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 11:13:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:13:41,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:41,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:41,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:41,463 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:41,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-20 11:13:41,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:41,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662806200] [2020-07-20 11:13:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:13:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:41,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:13:41,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 11:13:41,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:41,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:41,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:41,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:41,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 11:13:41,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662806200] [2020-07-20 11:13:41,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:41,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 11:13:41,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163637349] [2020-07-20 11:13:41,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:13:41,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:13:41,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:13:41,908 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 11:13:42,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:42,071 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 11:13:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:13:42,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 11:13:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:42,074 INFO L225 Difference]: With dead ends: 42 [2020-07-20 11:13:42,074 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 11:13:42,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 11:13:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 11:13:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:13:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 11:13:42,084 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 11:13:42,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:42,085 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 11:13:42,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:13:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 11:13:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 11:13:42,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:42,088 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:42,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:42,296 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:42,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-20 11:13:42,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:42,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332011440] [2020-07-20 11:13:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:13:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:42,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:13:42,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 11:13:42,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:42,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 11:13:42,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332011440] [2020-07-20 11:13:42,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:42,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 11:13:42,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715180057] [2020-07-20 11:13:42,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:13:42,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:42,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:13:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:13:42,669 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 11:13:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:42,793 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 11:13:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:13:42,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 11:13:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:42,796 INFO L225 Difference]: With dead ends: 47 [2020-07-20 11:13:42,797 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 11:13:42,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 11:13:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 11:13:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:13:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 11:13:42,808 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 11:13:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:42,808 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 11:13:42,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:13:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 11:13:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 11:13:42,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:42,811 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:43,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:43,017 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:43,018 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-20 11:13:43,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:43,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758564584] [2020-07-20 11:13:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:13:43,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 11:13:43,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:43,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:43,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:43,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:43,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:43,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 11:13:43,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758564584] [2020-07-20 11:13:43,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:43,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 11:13:43,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130994191] [2020-07-20 11:13:43,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:13:43,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:13:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:13:43,754 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 11:13:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:43,928 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 11:13:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:13:43,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 11:13:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:43,932 INFO L225 Difference]: With dead ends: 52 [2020-07-20 11:13:43,932 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:13:43,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:13:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:13:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 11:13:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:13:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 11:13:43,963 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 11:13:43,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:43,963 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 11:13:43,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:13:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 11:13:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 11:13:43,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:43,972 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:44,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:44,188 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:44,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-20 11:13:44,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:44,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058234530] [2020-07-20 11:13:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:13:44,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-20 11:13:44,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:44,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:44,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:44,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:44,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-20 11:13:44,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058234530] [2020-07-20 11:13:44,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:44,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-20 11:13:44,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643330748] [2020-07-20 11:13:44,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:13:44,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:44,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:13:44,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:13:44,920 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 12 states. [2020-07-20 11:13:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:45,047 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 11:13:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:13:45,050 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2020-07-20 11:13:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:45,052 INFO L225 Difference]: With dead ends: 57 [2020-07-20 11:13:45,052 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 11:13:45,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:13:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 11:13:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 11:13:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:13:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 11:13:45,082 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-20 11:13:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:45,083 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 11:13:45,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:13:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 11:13:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 11:13:45,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:45,091 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:45,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:45,307 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:45,307 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-20 11:13:45,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:45,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992843611] [2020-07-20 11:13:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:45,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:13:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 11:13:45,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:46,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 11:13:46,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992843611] [2020-07-20 11:13:46,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:46,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-20 11:13:46,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795732919] [2020-07-20 11:13:46,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:46,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:46,411 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 14 states. [2020-07-20 11:13:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:46,621 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 11:13:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:46,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 117 [2020-07-20 11:13:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:46,624 INFO L225 Difference]: With dead ends: 62 [2020-07-20 11:13:46,624 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 11:13:46,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:13:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 11:13:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 11:13:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:13:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 11:13:46,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-20 11:13:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:46,638 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 11:13:46,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 11:13:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 11:13:46,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:46,641 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:46,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:46,856 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-20 11:13:46,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:46,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537440280] [2020-07-20 11:13:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:13:46,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 221 proven. 407 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2020-07-20 11:13:47,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:47,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:47,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:47,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:48,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:48,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:48,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:48,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:48,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 223 proven. 427 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-07-20 11:13:48,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537440280] [2020-07-20 11:13:48,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:48,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-20 11:13:48,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535352689] [2020-07-20 11:13:48,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:48,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:48,168 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 14 states. [2020-07-20 11:13:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:48,376 INFO L93 Difference]: Finished difference Result 88 states and 260 transitions. [2020-07-20 11:13:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:48,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 190 [2020-07-20 11:13:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:48,379 INFO L225 Difference]: With dead ends: 88 [2020-07-20 11:13:48,379 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 11:13:48,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:13:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 11:13:48,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-20 11:13:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 11:13:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 70 transitions. [2020-07-20 11:13:48,393 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 70 transitions. Word has length 190 [2020-07-20 11:13:48,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:48,394 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 70 transitions. [2020-07-20 11:13:48,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 70 transitions. [2020-07-20 11:13:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 11:13:48,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:48,398 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:48,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:48,613 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-07-20 11:13:48,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:48,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121705423] [2020-07-20 11:13:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:13:48,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 11:13:48,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:49,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:49,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:49,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:49,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:49,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:49,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 130 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-07-20 11:13:49,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121705423] [2020-07-20 11:13:49,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:49,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-20 11:13:49,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060453557] [2020-07-20 11:13:49,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:49,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:49,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:49,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:49,756 INFO L87 Difference]: Start difference. First operand 49 states and 70 transitions. Second operand 14 states. [2020-07-20 11:13:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:49,922 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2020-07-20 11:13:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:49,922 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2020-07-20 11:13:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:49,925 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:13:49,925 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 11:13:49,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 248 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:13:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 11:13:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 11:13:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 11:13:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-20 11:13:49,935 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 136 [2020-07-20 11:13:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:49,936 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-20 11:13:49,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-20 11:13:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 11:13:49,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:49,938 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:50,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:50,152 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:50,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-07-20 11:13:50,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:50,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250739640] [2020-07-20 11:13:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 11:13:50,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-20 11:13:50,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-20 11:13:51,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250739640] [2020-07-20 11:13:51,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:51,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-07-20 11:13:51,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838425232] [2020-07-20 11:13:51,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:13:51,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:51,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:13:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:13:51,249 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 20 states. [2020-07-20 11:13:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:51,501 INFO L93 Difference]: Finished difference Result 112 states and 191 transitions. [2020-07-20 11:13:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 11:13:51,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2020-07-20 11:13:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:51,507 INFO L225 Difference]: With dead ends: 112 [2020-07-20 11:13:51,508 INFO L226 Difference]: Without dead ends: 105 [2020-07-20 11:13:51,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:13:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-20 11:13:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2020-07-20 11:13:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 11:13:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 145 transitions. [2020-07-20 11:13:51,561 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 145 transitions. Word has length 109 [2020-07-20 11:13:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:51,562 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 145 transitions. [2020-07-20 11:13:51,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:13:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 145 transitions. [2020-07-20 11:13:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 11:13:51,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:51,569 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:51,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:51,784 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1349477645, now seen corresponding path program 7 times [2020-07-20 11:13:51,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:51,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688994675] [2020-07-20 11:13:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:13:51,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 233 proven. 55 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-07-20 11:13:51,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:52,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 230 proven. 70 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-20 11:13:52,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688994675] [2020-07-20 11:13:52,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:52,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2020-07-20 11:13:52,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135232360] [2020-07-20 11:13:52,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:52,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:52,667 INFO L87 Difference]: Start difference. First operand 81 states and 145 transitions. Second operand 14 states. [2020-07-20 11:13:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:52,824 INFO L93 Difference]: Finished difference Result 97 states and 160 transitions. [2020-07-20 11:13:52,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:52,825 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-07-20 11:13:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:52,828 INFO L225 Difference]: With dead ends: 97 [2020-07-20 11:13:52,828 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 11:13:52,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 220 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:13:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 11:13:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2020-07-20 11:13:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 11:13:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 123 transitions. [2020-07-20 11:13:52,851 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 123 transitions. Word has length 121 [2020-07-20 11:13:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:52,853 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 123 transitions. [2020-07-20 11:13:52,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 123 transitions. [2020-07-20 11:13:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 11:13:52,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:52,857 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:53,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:53,070 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash -280177283, now seen corresponding path program 8 times [2020-07-20 11:13:53,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:53,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772563670] [2020-07-20 11:13:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:13:53,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 147 proven. 141 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-07-20 11:13:53,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:53,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:53,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:53,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:53,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:53,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:53,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 146 proven. 154 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-20 11:13:53,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772563670] [2020-07-20 11:13:53,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:53,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2020-07-20 11:13:53,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643852180] [2020-07-20 11:13:53,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:53,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:53,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:53,932 INFO L87 Difference]: Start difference. First operand 71 states and 123 transitions. Second operand 14 states. [2020-07-20 11:13:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:54,085 INFO L93 Difference]: Finished difference Result 107 states and 179 transitions. [2020-07-20 11:13:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:54,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-07-20 11:13:54,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:54,088 INFO L225 Difference]: With dead ends: 107 [2020-07-20 11:13:54,088 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 11:13:54,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 220 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:13:54,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 11:13:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-07-20 11:13:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 11:13:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 95 transitions. [2020-07-20 11:13:54,106 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 95 transitions. Word has length 121 [2020-07-20 11:13:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:54,109 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 95 transitions. [2020-07-20 11:13:54,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:54,109 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 95 transitions. [2020-07-20 11:13:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-20 11:13:54,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:54,111 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 7, 7, 7, 7, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:54,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:54,327 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1402909364, now seen corresponding path program 9 times [2020-07-20 11:13:54,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:54,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230493270] [2020-07-20 11:13:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:13:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 78 proven. 202 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-07-20 11:13:54,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:55,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:55,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:55,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:55,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:55,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:55,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 84 proven. 218 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-20 11:13:55,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230493270] [2020-07-20 11:13:55,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:55,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-20 11:13:55,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900933715] [2020-07-20 11:13:55,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:55,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:55,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:55,393 INFO L87 Difference]: Start difference. First operand 61 states and 95 transitions. Second operand 14 states. [2020-07-20 11:13:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:55,571 INFO L93 Difference]: Finished difference Result 109 states and 171 transitions. [2020-07-20 11:13:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:55,572 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2020-07-20 11:13:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:55,573 INFO L225 Difference]: With dead ends: 109 [2020-07-20 11:13:55,573 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 11:13:55,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 196 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:13:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 11:13:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-20 11:13:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 11:13:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-07-20 11:13:55,594 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 110 [2020-07-20 11:13:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:55,595 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-07-20 11:13:55,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-07-20 11:13:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 11:13:55,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:55,598 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:55,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:55,812 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1072341053, now seen corresponding path program 10 times [2020-07-20 11:13:55,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:55,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343393799] [2020-07-20 11:13:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:13:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 113 proven. 175 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-07-20 11:13:55,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:56,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 114 proven. 186 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-20 11:13:56,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343393799] [2020-07-20 11:13:56,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:56,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2020-07-20 11:13:56,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586507653] [2020-07-20 11:13:56,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:56,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:56,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:56,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:56,704 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 14 states. [2020-07-20 11:13:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:56,822 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-07-20 11:13:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:56,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-07-20 11:13:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:56,823 INFO L225 Difference]: With dead ends: 75 [2020-07-20 11:13:56,824 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 11:13:56,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 220 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:13:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 11:13:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-20 11:13:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 11:13:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-07-20 11:13:56,834 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 121 [2020-07-20 11:13:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:56,835 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-07-20 11:13:56,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-07-20 11:13:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 11:13:56,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:56,837 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:57,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:57,052 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash -419017667, now seen corresponding path program 11 times [2020-07-20 11:13:57,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:57,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202212550] [2020-07-20 11:13:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:57,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:13:57,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 116 proven. 217 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2020-07-20 11:13:57,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:57,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:57,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:58,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:58,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:58,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:58,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:58,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:58,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 112 proven. 243 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2020-07-20 11:13:58,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202212550] [2020-07-20 11:13:58,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:58,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-20 11:13:58,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546908805] [2020-07-20 11:13:58,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:13:58,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:13:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:13:58,288 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 16 states. [2020-07-20 11:13:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:58,459 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-07-20 11:13:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:13:58,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 121 [2020-07-20 11:13:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:58,461 INFO L225 Difference]: With dead ends: 77 [2020-07-20 11:13:58,461 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:13:58,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 216 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:13:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:13:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:13:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:13:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:13:58,464 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-07-20 11:13:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:58,464 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:13:58,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:13:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:13:58,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:13:58,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:58,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:13:58,961 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 34 [2020-07-20 11:13:59,196 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 67 [2020-07-20 11:13:59,310 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2020-07-20 11:13:59,431 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 52 [2020-07-20 11:13:59,557 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 56 [2020-07-20 11:14:00,052 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 52 [2020-07-20 11:14:00,790 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 52 [2020-07-20 11:14:01,876 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 31 [2020-07-20 11:14:01,899 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:14:01,900 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:14:01,900 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:14:01,900 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:14:01,900 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:14:01,900 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:14:01,901 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-20 11:14:01,901 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-20 11:14:01,901 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-20 11:14:01,901 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-20 11:14:01,901 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-20 11:14:01,901 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-20 11:14:01,902 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-20 11:14:01,902 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-20 11:14:01,902 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-20 11:14:01,902 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-20 11:14:01,902 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-20 11:14:01,902 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-20 11:14:01,902 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 11:14:01,903 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (and (= |fibo_#t~ret0| 2) (<= |fibo_#in~n| 4))) (.cse1 (<= |fibo_#in~n| 3))) (and (or .cse0 (and (<= 3 |fibo_#in~n|) .cse1) (<= 5 |fibo_#in~n|) (and (<= |fibo_#in~n| 2) (<= 2 |fibo_#in~n|))) (or .cse0 (<= 6 |fibo_#in~n|) (= |fibo_#t~ret0| 3) .cse1) (let ((.cse2 (<= fibo_~n |fibo_#in~n|)) (.cse3 (<= |fibo_#in~n| fibo_~n))) (or (and (<= 4 |fibo_#in~n|) .cse2 .cse3) (and (= |fibo_#t~ret0| 1) .cse2 .cse3))))) [2020-07-20 11:14:01,903 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-20 11:14:01,903 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-20 11:14:01,903 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-20 11:14:01,903 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-20 11:14:01,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:14:01 BoogieIcfgContainer [2020-07-20 11:14:01,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:14:01,923 INFO L168 Benchmark]: Toolchain (without parser) took 23690.49 ms. Allocated memory was 137.9 MB in the beginning and 461.9 MB in the end (delta: 324.0 MB). Free memory was 103.4 MB in the beginning and 428.1 MB in the end (delta: -324.7 MB). Peak memory consumption was 315.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:01,924 INFO L168 Benchmark]: CDTParser took 0.19 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: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:14:01,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.63 ms. Allocated memory is still 137.9 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:01,925 INFO L168 Benchmark]: Boogie Preprocessor took 32.14 ms. Allocated memory is still 137.9 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:01,930 INFO L168 Benchmark]: RCFGBuilder took 450.95 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 168.8 MB in the end (delta: -76.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:01,931 INFO L168 Benchmark]: TraceAbstraction took 22862.83 ms. Allocated memory was 200.8 MB in the beginning and 461.9 MB in the end (delta: 261.1 MB). Free memory was 168.2 MB in the beginning and 428.1 MB in the end (delta: -260.0 MB). Peak memory consumption was 317.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:01,933 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.63 ms. Allocated memory is still 137.9 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.14 ms. Allocated memory is still 137.9 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 450.95 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 168.8 MB in the end (delta: -76.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22862.83 ms. Allocated memory was 200.8 MB in the beginning and 461.9 MB in the end (delta: 261.1 MB). Free memory was 168.2 MB in the beginning and 428.1 MB in the end (delta: -260.0 MB). Peak memory consumption was 317.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.5s, OverallIterations: 17, TraceHistogramMax: 27, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 377 SDtfs, 425 SDslu, 1661 SDs, 0 SdLazy, 1650 SolverSat, 426 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2958 GetRequests, 2601 SyntacticMatches, 123 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 135 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 95 PreInvPairs, 1452 NumberOfFragments, 86 HoareAnnotationTreeSize, 95 FomulaSimplifications, 595296 FormulaSimplificationTreeSizeReduction, 2.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 5107 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 1467 NumberOfCodeBlocks, 1467 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2875 ConstructedInterpolants, 0 QuantifiedInterpolants, 608965 SizeOfPredicates, 73 NumberOfNonLiveVariables, 3278 ConjunctsInSsa, 213 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 12349/16608 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...