./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f6fb2bb1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0aae719d835771c4602eac7b24cfefa200f147c0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-f6fb2bb [2019-11-19 18:58:13,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 18:58:13,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 18:58:13,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 18:58:13,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 18:58:13,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 18:58:13,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 18:58:13,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 18:58:13,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 18:58:13,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 18:58:13,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 18:58:13,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 18:58:13,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 18:58:13,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 18:58:13,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 18:58:13,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 18:58:13,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 18:58:13,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 18:58:13,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 18:58:13,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 18:58:13,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 18:58:13,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 18:58:13,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 18:58:13,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 18:58:13,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 18:58:13,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 18:58:13,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 18:58:13,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 18:58:13,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 18:58:13,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 18:58:13,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 18:58:13,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 18:58:13,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 18:58:13,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 18:58:13,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 18:58:13,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 18:58:13,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 18:58:13,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 18:58:13,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 18:58:13,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 18:58:13,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 18:58:13,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 18:58:13,340 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 18:58:13,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 18:58:13,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 18:58:13,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 18:58:13,342 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 18:58:13,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 18:58:13,342 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 18:58:13,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 18:58:13,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 18:58:13,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 18:58:13,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 18:58:13,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 18:58:13,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 18:58:13,344 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 18:58:13,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 18:58:13,344 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 18:58:13,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 18:58:13,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 18:58:13,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 18:58:13,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 18:58:13,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 18:58:13,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 18:58:13,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 18:58:13,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 18:58:13,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 18:58:13,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 18:58:13,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 18:58:13,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 18:58:13,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0aae719d835771c4602eac7b24cfefa200f147c0 [2019-11-19 18:58:13,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 18:58:13,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 18:58:13,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 18:58:13,731 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 18:58:13,731 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 18:58:13,732 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2019-11-19 18:58:13,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc197b776/02eebb3c4d494c5ea22baebe70f09cf0/FLAG0f4719684 [2019-11-19 18:58:14,291 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 18:58:14,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2019-11-19 18:58:14,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc197b776/02eebb3c4d494c5ea22baebe70f09cf0/FLAG0f4719684 [2019-11-19 18:58:14,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc197b776/02eebb3c4d494c5ea22baebe70f09cf0 [2019-11-19 18:58:14,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 18:58:14,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 18:58:14,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 18:58:14,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 18:58:14,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 18:58:14,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:14,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49fb18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14, skipping insertion in model container [2019-11-19 18:58:14,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:14,710 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 18:58:14,731 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 18:58:14,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 18:58:14,907 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 18:58:14,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 18:58:14,936 INFO L192 MainTranslator]: Completed translation [2019-11-19 18:58:14,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14 WrapperNode [2019-11-19 18:58:14,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 18:58:14,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 18:58:14,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 18:58:14,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 18:58:14,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:14,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:14,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 18:58:14,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 18:58:14,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 18:58:14,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 18:58:15,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:15,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:15,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:15,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:15,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:15,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:15,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (1/1) ... [2019-11-19 18:58:15,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 18:58:15,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 18:58:15,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 18:58:15,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 18:58:15,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (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 [2019-11-19 18:58:15,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 18:58:15,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 18:58:15,110 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-19 18:58:15,110 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-19 18:58:15,261 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 18:58:15,261 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 18:58:15,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:58:15 BoogieIcfgContainer [2019-11-19 18:58:15,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 18:58:15,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 18:58:15,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 18:58:15,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 18:58:15,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:58:14" (1/3) ... [2019-11-19 18:58:15,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8a400f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:58:15, skipping insertion in model container [2019-11-19 18:58:15,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:14" (2/3) ... [2019-11-19 18:58:15,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8a400f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:58:15, skipping insertion in model container [2019-11-19 18:58:15,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:58:15" (3/3) ... [2019-11-19 18:58:15,270 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2019-11-19 18:58:15,277 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 18:58:15,284 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 18:58:15,297 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 18:58:15,321 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 18:58:15,322 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 18:58:15,322 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 18:58:15,322 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 18:58:15,322 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 18:58:15,322 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 18:58:15,322 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 18:58:15,322 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 18:58:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-19 18:58:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 18:58:15,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:15,347 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:15,347 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:15,354 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-19 18:58:15,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:15,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619010857] [2019-11-19 18:58:15,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:58:15,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619010857] [2019-11-19 18:58:15,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:58:15,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-19 18:58:15,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790573904] [2019-11-19 18:58:15,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 18:58:15,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:15,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 18:58:15,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:58:15,737 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-19 18:58:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:15,851 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-19 18:58:15,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 18:58:15,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-19 18:58:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:15,864 INFO L225 Difference]: With dead ends: 24 [2019-11-19 18:58:15,864 INFO L226 Difference]: Without dead ends: 14 [2019-11-19 18:58:15,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-19 18:58:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-19 18:58:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-19 18:58:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 18:58:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-19 18:58:15,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-19 18:58:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:15,911 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-19 18:58:15,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 18:58:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-19 18:58:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 18:58:15,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:15,913 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:15,913 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-19 18:58:15,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:15,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976644982] [2019-11-19 18:58:15,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 18:58:16,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976644982] [2019-11-19 18:58:16,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31919364] [2019-11-19 18:58:16,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -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 [2019-11-19 18:58:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:16,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 18:58:16,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 18:58:16,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:16,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-11-19 18:58:16,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431244423] [2019-11-19 18:58:16,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 18:58:16,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:16,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 18:58:16,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-19 18:58:16,185 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2019-11-19 18:58:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:16,290 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-19 18:58:16,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 18:58:16,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-19 18:58:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:16,292 INFO L225 Difference]: With dead ends: 21 [2019-11-19 18:58:16,292 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 18:58:16,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-19 18:58:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 18:58:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-19 18:58:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 18:58:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-19 18:58:16,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-19 18:58:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:16,304 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-19 18:58:16,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 18:58:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-19 18:58:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 18:58:16,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:16,306 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:16,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:16,520 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-19 18:58:16,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:16,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420971746] [2019-11-19 18:58:16,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 18:58:16,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420971746] [2019-11-19 18:58:16,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84833139] [2019-11-19 18:58:16,716 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:16,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 18:58:16,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:58:16,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 18:58:16,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 18:58:16,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:16,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-11-19 18:58:16,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505957802] [2019-11-19 18:58:16,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 18:58:16,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 18:58:16,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-19 18:58:16,821 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-11-19 18:58:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:16,928 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-19 18:58:16,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 18:58:16,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-19 18:58:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:16,930 INFO L225 Difference]: With dead ends: 24 [2019-11-19 18:58:16,930 INFO L226 Difference]: Without dead ends: 20 [2019-11-19 18:58:16,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-11-19 18:58:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-19 18:58:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-19 18:58:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 18:58:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-19 18:58:16,943 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-19 18:58:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:16,944 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-19 18:58:16,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 18:58:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-19 18:58:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 18:58:16,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:16,948 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:17,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:17,153 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:17,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-19 18:58:17,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:17,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977276517] [2019-11-19 18:58:17,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 18:58:17,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977276517] [2019-11-19 18:58:17,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90532746] [2019-11-19 18:58:17,376 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-19 18:58:17,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-19 18:58:17,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:58:17,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 18:58:17,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 18:58:17,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:17,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-11-19 18:58:17,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426377364] [2019-11-19 18:58:17,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 18:58:17,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 18:58:17,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-19 18:58:17,471 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-11-19 18:58:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:17,588 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-19 18:58:17,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 18:58:17,589 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-19 18:58:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:17,590 INFO L225 Difference]: With dead ends: 27 [2019-11-19 18:58:17,590 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 18:58:17,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-19 18:58:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 18:58:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-19 18:58:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-19 18:58:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-19 18:58:17,608 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-19 18:58:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:17,611 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-19 18:58:17,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 18:58:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-19 18:58:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-19 18:58:17,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:17,615 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:17,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:17,822 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-19 18:58:17,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:17,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795209165] [2019-11-19 18:58:17,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-19 18:58:18,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795209165] [2019-11-19 18:58:18,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546430382] [2019-11-19 18:58:18,064 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-19 18:58:18,102 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 18:58:18,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:58:18,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 18:58:18,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-19 18:58:18,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:18,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-11-19 18:58:18,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173547771] [2019-11-19 18:58:18,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 18:58:18,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:18,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 18:58:18,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-19 18:58:18,158 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2019-11-19 18:58:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:18,265 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-19 18:58:18,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 18:58:18,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-19 18:58:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:18,266 INFO L225 Difference]: With dead ends: 30 [2019-11-19 18:58:18,267 INFO L226 Difference]: Without dead ends: 26 [2019-11-19 18:58:18,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-19 18:58:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-19 18:58:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-19 18:58:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 18:58:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-19 18:58:18,274 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-19 18:58:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:18,275 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-19 18:58:18,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 18:58:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-19 18:58:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 18:58:18,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:18,279 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:18,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:18,480 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:18,481 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-19 18:58:18,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:18,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454975469] [2019-11-19 18:58:18,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-19 18:58:18,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454975469] [2019-11-19 18:58:18,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235431646] [2019-11-19 18:58:18,715 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-11-19 18:58:18,759 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 18:58:18,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:58:18,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 18:58:18,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-19 18:58:18,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:18,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2019-11-19 18:58:18,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576791076] [2019-11-19 18:58:18,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 18:58:18,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:18,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 18:58:18,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-19 18:58:18,810 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 14 states. [2019-11-19 18:58:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:18,929 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-19 18:58:18,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 18:58:18,930 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-11-19 18:58:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:18,931 INFO L225 Difference]: With dead ends: 33 [2019-11-19 18:58:18,931 INFO L226 Difference]: Without dead ends: 29 [2019-11-19 18:58:18,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-11-19 18:58:18,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-19 18:58:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-19 18:58:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-19 18:58:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-19 18:58:18,939 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-19 18:58:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:18,939 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-19 18:58:18,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 18:58:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-19 18:58:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-19 18:58:18,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:18,942 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:19,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:19,154 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:19,155 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-19 18:58:19,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:19,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137643981] [2019-11-19 18:58:19,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-19 18:58:19,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137643981] [2019-11-19 18:58:19,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992473591] [2019-11-19 18:58:19,430 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-19 18:58:19,478 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-19 18:58:19,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:58:19,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 18:58:19,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-19 18:58:19,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:19,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2019-11-19 18:58:19,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600966723] [2019-11-19 18:58:19,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-19 18:58:19,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:19,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-19 18:58:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2019-11-19 18:58:19,736 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 28 states. [2019-11-19 18:58:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:20,082 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-19 18:58:20,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 18:58:20,082 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2019-11-19 18:58:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:20,084 INFO L225 Difference]: With dead ends: 36 [2019-11-19 18:58:20,084 INFO L226 Difference]: Without dead ends: 32 [2019-11-19 18:58:20,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2019-11-19 18:58:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-19 18:58:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-19 18:58:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-19 18:58:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-19 18:58:20,092 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-19 18:58:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:20,092 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-19 18:58:20,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-19 18:58:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-19 18:58:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-19 18:58:20,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:20,094 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:20,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:20,299 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:20,300 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-19 18:58:20,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:20,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605208125] [2019-11-19 18:58:20,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-19 18:58:20,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605208125] [2019-11-19 18:58:20,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928094721] [2019-11-19 18:58:20,568 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-19 18:58:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:20,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 18:58:20,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-19 18:58:20,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:20,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2019-11-19 18:58:20,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267203291] [2019-11-19 18:58:20,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 18:58:20,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:20,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 18:58:20,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-19 18:58:20,727 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2019-11-19 18:58:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:20,881 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-19 18:58:20,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 18:58:20,884 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-11-19 18:58:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:20,885 INFO L225 Difference]: With dead ends: 39 [2019-11-19 18:58:20,885 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 18:58:20,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2019-11-19 18:58:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 18:58:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-19 18:58:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-19 18:58:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-19 18:58:20,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-19 18:58:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:20,896 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-19 18:58:20,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 18:58:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-19 18:58:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-19 18:58:20,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:20,899 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:21,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:21,100 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-19 18:58:21,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:21,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718249762] [2019-11-19 18:58:21,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-19 18:58:21,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718249762] [2019-11-19 18:58:21,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589240472] [2019-11-19 18:58:21,362 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-19 18:58:21,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 18:58:21,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:58:21,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 18:58:21,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-19 18:58:21,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:21,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2019-11-19 18:58:21,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862144150] [2019-11-19 18:58:21,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 18:58:21,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:21,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 18:58:21,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-19 18:58:21,480 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-11-19 18:58:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:21,634 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-19 18:58:21,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 18:58:21,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-11-19 18:58:21,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:21,636 INFO L225 Difference]: With dead ends: 42 [2019-11-19 18:58:21,636 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 18:58:21,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2019-11-19 18:58:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 18:58:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-19 18:58:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-19 18:58:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-19 18:58:21,644 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-19 18:58:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:21,645 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-19 18:58:21,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 18:58:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-19 18:58:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-19 18:58:21,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:21,647 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:21,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:21,848 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-19 18:58:21,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:21,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576518864] [2019-11-19 18:58:21,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-19 18:58:22,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576518864] [2019-11-19 18:58:22,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772374059] [2019-11-19 18:58:22,187 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-19 18:58:22,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-19 18:58:22,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:58:22,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 18:58:22,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-19 18:58:22,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:22,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2019-11-19 18:58:22,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442007541] [2019-11-19 18:58:22,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-19 18:58:22,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:22,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-19 18:58:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2019-11-19 18:58:22,744 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 37 states. [2019-11-19 18:58:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:23,258 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-19 18:58:23,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-19 18:58:23,258 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-11-19 18:58:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:23,259 INFO L225 Difference]: With dead ends: 45 [2019-11-19 18:58:23,259 INFO L226 Difference]: Without dead ends: 41 [2019-11-19 18:58:23,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2019-11-19 18:58:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-19 18:58:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-19 18:58:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-19 18:58:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-19 18:58:23,268 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-19 18:58:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:23,269 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-19 18:58:23,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-19 18:58:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-19 18:58:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-19 18:58:23,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:23,271 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:23,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:23,483 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-19 18:58:23,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:23,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804410440] [2019-11-19 18:58:23,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 18:58:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 18:58:23,526 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 18:58:23,526 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 18:58:23,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:58:23 BoogieIcfgContainer [2019-11-19 18:58:23,566 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 18:58:23,567 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 18:58:23,567 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 18:58:23,567 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 18:58:23,568 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:58:15" (3/4) ... [2019-11-19 18:58:23,571 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 18:58:23,659 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 18:58:23,660 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 18:58:23,662 INFO L168 Benchmark]: Toolchain (without parser) took 8969.39 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 288.4 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -155.0 MB). Peak memory consumption was 133.4 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:23,663 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 18:58:23,664 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.70 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:23,664 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.40 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 18:58:23,665 INFO L168 Benchmark]: Boogie Preprocessor took 80.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:23,665 INFO L168 Benchmark]: RCFGBuilder took 216.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:23,666 INFO L168 Benchmark]: TraceAbstraction took 8302.66 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 145.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.5 MB). Peak memory consumption was 154.7 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:23,666 INFO L168 Benchmark]: Witness Printer took 93.02 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2019-11-19 18:58:23,668 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 243.70 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.40 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 80.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 216.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8302.66 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 145.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.5 MB). Peak memory consumption was 154.7 MB. Max. memory is 11.5 GB. * Witness Printer took 93.02 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 8.2s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 179 SDslu, 555 SDs, 0 SdLazy, 604 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 780 NumberOfCodeBlocks, 775 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 692 ConstructedInterpolants, 0 QuantifiedInterpolants, 75824 SizeOfPredicates, 46 NumberOfNonLiveVariables, 826 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...