/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:16:32,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:16:32,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:16:32,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:16:32,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:16:32,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:16:32,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:16:32,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:16:32,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:16:32,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:16:32,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:16:32,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:16:32,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:16:32,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:16:32,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:16:32,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:16:32,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:16:32,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:16:32,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:16:32,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:16:32,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:16:32,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:16:32,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:16:32,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:16:32,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:16:32,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:16:32,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:16:32,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:16:32,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:16:32,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 23:16:32,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 23:16:32,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 23:16:32,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 23:16:32,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 23:16:32,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 23:16:32,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 23:16:32,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 23:16:32,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 23:16:32,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:16:32,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:16:32,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:16:32,087 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 [2020-07-19 23:16:32,126 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:16:32,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:16:32,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:16:32,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:16:32,128 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:16:32,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:16:32,130 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:16:32,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:16:32,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:16:32,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:16:32,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:16:32,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:16:32,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:16:32,132 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:16:32,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:16:32,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:16:32,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:16:32,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:16:32,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:16:32,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:16:32,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:16:32,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:16:32,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:16:32,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:16:32,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:16:32,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:16:32,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:16:32,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:16:32,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:16:32,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:16:32,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:16:32,422 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:16:32,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:16:32,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:16:32,429 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:16:32,431 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-07-19 23:16:32,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06224f83c/b3812d1fa21447f292bfe9d0b82a0112/FLAG4deb07d73 [2020-07-19 23:16:32,984 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:16:32,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-07-19 23:16:32,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06224f83c/b3812d1fa21447f292bfe9d0b82a0112/FLAG4deb07d73 [2020-07-19 23:16:33,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06224f83c/b3812d1fa21447f292bfe9d0b82a0112 [2020-07-19 23:16:33,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:16:33,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:16:33,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:16:33,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:16:33,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:16:33,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a47b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33, skipping insertion in model container [2020-07-19 23:16:33,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:16:33,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:16:33,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:16:33,567 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:16:33,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:16:33,600 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:16:33,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33 WrapperNode [2020-07-19 23:16:33,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:16:33,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:16:33,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:16:33,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:16:33,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (1/1) ... [2020-07-19 23:16:33,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:16:33,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:16:33,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:16:33,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:16:33,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (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 [2020-07-19 23:16:33,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:16:33,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:16:33,775 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-19 23:16:33,776 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-19 23:16:33,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:16:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:16:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:16:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-19 23:16:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-19 23:16:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:16:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:16:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:16:33,970 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:16:33,971 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:16:33,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:16:33 BoogieIcfgContainer [2020-07-19 23:16:33,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:16:33,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:16:33,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:16:33,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:16:33,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:16:33" (1/3) ... [2020-07-19 23:16:33,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714b7937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:16:33, skipping insertion in model container [2020-07-19 23:16:33,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:33" (2/3) ... [2020-07-19 23:16:33,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714b7937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:16:33, skipping insertion in model container [2020-07-19 23:16:33,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:16:33" (3/3) ... [2020-07-19 23:16:33,983 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-07-19 23:16:33,992 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:16:33,998 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:16:34,011 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:16:34,036 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:16:34,036 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:16:34,036 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:16:34,037 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:16:34,037 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:16:34,037 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:16:34,037 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:16:34,037 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:16:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-19 23:16:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:16:34,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:34,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:34,062 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:34,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-19 23:16:34,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:34,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31799695] [2020-07-19 23:16:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:16:34,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31799695] [2020-07-19 23:16:34,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:16:34,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:16:34,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927340780] [2020-07-19 23:16:34,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:16:34,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:34,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:16:34,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:16:34,352 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-19 23:16:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:34,483 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-19 23:16:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:16:34,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:16:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:34,498 INFO L225 Difference]: With dead ends: 44 [2020-07-19 23:16:34,498 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:16:34,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:16:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:16:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 23:16:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:16:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-19 23:16:34,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-19 23:16:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:34,583 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-19 23:16:34,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:16:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-19 23:16:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:16:34,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:34,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:34,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:16:34,590 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:34,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:34,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-19 23:16:34,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:34,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010767749] [2020-07-19 23:16:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:16:34,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010767749] [2020-07-19 23:16:34,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:16:34,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:16:34,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167551500] [2020-07-19 23:16:34,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:16:34,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:34,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:16:34,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:16:34,673 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-19 23:16:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:34,747 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-19 23:16:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:16:34,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-19 23:16:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:34,750 INFO L225 Difference]: With dead ends: 36 [2020-07-19 23:16:34,750 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 23:16:34,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:16:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 23:16:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-19 23:16:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:16:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-19 23:16:34,762 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-19 23:16:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:34,763 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-19 23:16:34,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:16:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-19 23:16:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:16:34,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:34,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:34,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:16:34,766 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-19 23:16:34,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:34,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234295636] [2020-07-19 23:16:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:16:34,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234295636] [2020-07-19 23:16:34,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764165198] [2020-07-19 23:16:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b1072e0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:34,992 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b1072e0 issued 3 check-sat command(s) [2020-07-19 23:16:34,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:16:35,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:16:35,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:35,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-19 23:16:35,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630231753] [2020-07-19 23:16:35,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:16:35,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:35,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:16:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:16:35,143 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-19 23:16:35,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:35,369 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-19 23:16:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:16:35,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-19 23:16:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:35,371 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:16:35,372 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 23:16:35,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:16:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 23:16:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-19 23:16:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-19 23:16:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-19 23:16:35,382 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-19 23:16:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:35,383 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-19 23:16:35,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:16:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-19 23:16:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:16:35,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:35,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:35,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:16:35,599 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:35,600 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-19 23:16:35,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:35,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135635188] [2020-07-19 23:16:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:16:35,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135635188] [2020-07-19 23:16:35,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954710271] [2020-07-19 23:16:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3bf8632c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-19 23:16:35,818 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3bf8632c issued 3 check-sat command(s) [2020-07-19 23:16:35,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:16:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:16:35,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:35,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-19 23:16:35,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975619795] [2020-07-19 23:16:35,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:16:35,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:35,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:16:35,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:16:35,881 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-19 23:16:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:36,084 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-19 23:16:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:16:36,086 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-19 23:16:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:36,092 INFO L225 Difference]: With dead ends: 54 [2020-07-19 23:16:36,094 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 23:16:36,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:16:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 23:16:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-19 23:16:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:16:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-19 23:16:36,120 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-19 23:16:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:36,121 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-19 23:16:36,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:16:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-19 23:16:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-19 23:16:36,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:36,123 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:36,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:36,333 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:36,334 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-19 23:16:36,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:36,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031885713] [2020-07-19 23:16:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 23:16:36,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031885713] [2020-07-19 23:16:36,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002110527] [2020-07-19 23:16:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@785effc8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:36,553 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@785effc8 issued 3 check-sat command(s) [2020-07-19 23:16:36,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:16:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:16:36,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:36,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-19 23:16:36,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186681771] [2020-07-19 23:16:36,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:16:36,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:16:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:16:36,640 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-19 23:16:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:36,949 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-19 23:16:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:16:36,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-19 23:16:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:36,952 INFO L225 Difference]: With dead ends: 108 [2020-07-19 23:16:36,952 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:16:36,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:16:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:16:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-19 23:16:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 23:16:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-19 23:16:36,984 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-19 23:16:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:36,984 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-19 23:16:36,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:16:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-19 23:16:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 23:16:36,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:36,987 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:37,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:37,200 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-19 23:16:37,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:37,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898273108] [2020-07-19 23:16:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-19 23:16:37,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898273108] [2020-07-19 23:16:37,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315273623] [2020-07-19 23:16:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6ec804cf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:37,359 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6ec804cf issued 3 check-sat command(s) [2020-07-19 23:16:37,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:37,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:16:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 23:16:37,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:37,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-19 23:16:37,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713960315] [2020-07-19 23:16:37,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:16:37,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:37,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:16:37,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:16:37,455 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-19 23:16:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:37,901 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-19 23:16:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:16:37,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-19 23:16:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:37,906 INFO L225 Difference]: With dead ends: 180 [2020-07-19 23:16:37,906 INFO L226 Difference]: Without dead ends: 120 [2020-07-19 23:16:37,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:16:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-19 23:16:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-19 23:16:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-19 23:16:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-19 23:16:37,934 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-19 23:16:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:37,935 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-19 23:16:37,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:16:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-19 23:16:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 23:16:37,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:37,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:38,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:38,154 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-19 23:16:38,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:38,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965934072] [2020-07-19 23:16:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-19 23:16:38,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965934072] [2020-07-19 23:16:38,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091112968] [2020-07-19 23:16:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61e3a13f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:38,431 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61e3a13f issued 3 check-sat command(s) [2020-07-19 23:16:38,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:16:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-19 23:16:38,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:38,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-19 23:16:38,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466852481] [2020-07-19 23:16:38,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:16:38,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:38,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:16:38,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:16:38,536 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-07-19 23:16:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:39,087 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-19 23:16:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:16:39,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-19 23:16:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:39,092 INFO L225 Difference]: With dead ends: 258 [2020-07-19 23:16:39,093 INFO L226 Difference]: Without dead ends: 158 [2020-07-19 23:16:39,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:16:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-19 23:16:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-19 23:16:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-19 23:16:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-19 23:16:39,131 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-19 23:16:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:39,135 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-19 23:16:39,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:16:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-19 23:16:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-19 23:16:39,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:39,142 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:39,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:16:39,351 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-07-19 23:16:39,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:39,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935012018] [2020-07-19 23:16:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-19 23:16:39,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935012018] [2020-07-19 23:16:39,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698710634] [2020-07-19 23:16:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32455ff1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:39,725 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32455ff1 issued 3 check-sat command(s) [2020-07-19 23:16:39,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:16:39,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-19 23:16:39,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:39,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-07-19 23:16:39,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305458423] [2020-07-19 23:16:39,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:16:39,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:39,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:16:39,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:16:39,858 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 16 states. [2020-07-19 23:16:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:40,480 INFO L93 Difference]: Finished difference Result 243 states and 465 transitions. [2020-07-19 23:16:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:16:40,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-07-19 23:16:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:40,484 INFO L225 Difference]: With dead ends: 243 [2020-07-19 23:16:40,484 INFO L226 Difference]: Without dead ends: 110 [2020-07-19 23:16:40,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:16:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-19 23:16:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-07-19 23:16:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 23:16:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-07-19 23:16:40,501 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 82 [2020-07-19 23:16:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:40,501 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-07-19 23:16:40,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:16:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-07-19 23:16:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-19 23:16:40,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:40,504 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:40,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:40,708 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times [2020-07-19 23:16:40,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:40,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781145869] [2020-07-19 23:16:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-07-19 23:16:41,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781145869] [2020-07-19 23:16:41,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560654698] [2020-07-19 23:16:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26c5e6bc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:41,076 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26c5e6bc issued 3 check-sat command(s) [2020-07-19 23:16:41,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:41,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:16:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-07-19 23:16:41,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:41,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-19 23:16:41,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142321659] [2020-07-19 23:16:41,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:16:41,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:41,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:16:41,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:16:41,204 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 15 states. [2020-07-19 23:16:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:41,673 INFO L93 Difference]: Finished difference Result 172 states and 251 transitions. [2020-07-19 23:16:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:16:41,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 123 [2020-07-19 23:16:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:41,676 INFO L225 Difference]: With dead ends: 172 [2020-07-19 23:16:41,677 INFO L226 Difference]: Without dead ends: 96 [2020-07-19 23:16:41,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:16:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-19 23:16:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-07-19 23:16:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-19 23:16:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2020-07-19 23:16:41,708 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 123 [2020-07-19 23:16:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:41,709 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2020-07-19 23:16:41,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:16:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2020-07-19 23:16:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-19 23:16:41,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:41,715 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:41,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:41,916 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1830253150, now seen corresponding path program 2 times [2020-07-19 23:16:41,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:41,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032606562] [2020-07-19 23:16:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 110 proven. 86 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-07-19 23:16:42,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032606562] [2020-07-19 23:16:42,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315496826] [2020-07-19 23:16:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@257397d3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:42,351 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@257397d3 issued 3 check-sat command(s) [2020-07-19 23:16:42,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:16:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 78 proven. 106 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-07-19 23:16:42,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:42,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2020-07-19 23:16:42,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272946503] [2020-07-19 23:16:42,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:16:42,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:16:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:16:42,519 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand 18 states. [2020-07-19 23:16:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:43,086 INFO L93 Difference]: Finished difference Result 204 states and 330 transitions. [2020-07-19 23:16:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 23:16:43,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 137 [2020-07-19 23:16:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:43,090 INFO L225 Difference]: With dead ends: 204 [2020-07-19 23:16:43,090 INFO L226 Difference]: Without dead ends: 98 [2020-07-19 23:16:43,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:16:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-19 23:16:43,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-07-19 23:16:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-19 23:16:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-07-19 23:16:43,113 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 137 [2020-07-19 23:16:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:43,113 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-07-19 23:16:43,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:16:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-07-19 23:16:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-19 23:16:43,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:43,116 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:43,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 23:16:43,331 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:43,332 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 1 times [2020-07-19 23:16:43,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:43,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585241986] [2020-07-19 23:16:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-07-19 23:16:43,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585241986] [2020-07-19 23:16:43,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621235208] [2020-07-19 23:16:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500c2734 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:43,926 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@500c2734 issued 4 check-sat command(s) [2020-07-19 23:16:43,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:43,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:16:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-07-19 23:16:44,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:44,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 17 [2020-07-19 23:16:44,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938958777] [2020-07-19 23:16:44,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:16:44,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:44,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:16:44,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:16:44,049 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 17 states. [2020-07-19 23:16:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:44,610 INFO L93 Difference]: Finished difference Result 202 states and 257 transitions. [2020-07-19 23:16:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 23:16:44,611 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 150 [2020-07-19 23:16:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:44,614 INFO L225 Difference]: With dead ends: 202 [2020-07-19 23:16:44,614 INFO L226 Difference]: Without dead ends: 114 [2020-07-19 23:16:44,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:16:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-19 23:16:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-07-19 23:16:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-19 23:16:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2020-07-19 23:16:44,634 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 150 [2020-07-19 23:16:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:44,635 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2020-07-19 23:16:44,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:16:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2020-07-19 23:16:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-19 23:16:44,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:44,641 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:44,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:44,857 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:44,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 2 times [2020-07-19 23:16:44,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:44,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097034970] [2020-07-19 23:16:44,859 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b2f23db [2020-07-19 23:16:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:16:44,888 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:16:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:16:44,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:16:44,939 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:16:44,939 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:16:44,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-19 23:16:45,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:16:45 BoogieIcfgContainer [2020-07-19 23:16:45,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:16:45,008 INFO L168 Benchmark]: Toolchain (without parser) took 11640.53 ms. Allocated memory was 138.9 MB in the beginning and 321.4 MB in the end (delta: 182.5 MB). Free memory was 104.1 MB in the beginning and 180.5 MB in the end (delta: -76.4 MB). Peak memory consumption was 106.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:45,009 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-19 23:16:45,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.97 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 94.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:45,015 INFO L168 Benchmark]: Boogie Preprocessor took 27.03 ms. Allocated memory is still 138.9 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:45,016 INFO L168 Benchmark]: RCFGBuilder took 346.61 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.8 MB in the beginning and 169.2 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:45,020 INFO L168 Benchmark]: TraceAbstraction took 11029.40 ms. Allocated memory was 202.9 MB in the beginning and 321.4 MB in the end (delta: 118.5 MB). Free memory was 168.6 MB in the beginning and 180.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 106.5 MB. Max. memory is 7.1 GB. [2020-07-19 23:16:45,027 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.97 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 94.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.03 ms. Allocated memory is still 138.9 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.61 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.8 MB in the beginning and 169.2 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11029.40 ms. Allocated memory was 202.9 MB in the beginning and 321.4 MB in the end (delta: 118.5 MB). Free memory was 168.6 MB in the beginning and 180.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 106.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; VAL [x=6] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=8, x=6] [L37] int result = fibo1(x); [L38] COND TRUE result == 8 VAL [result=8, x=6] [L39] __VERIFIER_error() VAL [result=8, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.9s, OverallIterations: 12, TraceHistogramMax: 13, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 338 SDtfs, 496 SDslu, 2072 SDs, 0 SdLazy, 2932 SolverSat, 498 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1080 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=7, 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, 11 MinimizatonAttempts, 101 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1560 NumberOfCodeBlocks, 1437 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1363 ConstructedInterpolants, 0 QuantifiedInterpolants, 218669 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1326 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 2426/3144 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 incorrect! Received shutdown request...