./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 11bff2dc480380b1206bedd51506b0437b9af4529e78b5beefb811437146f17f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:11:45,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:11:45,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:11:45,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:11:45,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:11:45,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:11:45,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:11:45,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:11:45,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:11:45,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:11:45,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:11:45,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:11:45,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:11:45,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:11:45,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:11:45,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:11:45,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:11:45,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:11:45,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:11:45,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:11:45,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:11:45,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:11:45,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:11:45,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:11:45,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:11:45,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:11:45,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:11:45,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:11:45,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:11:45,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:11:45,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:11:45,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:11:45,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:11:45,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:11:45,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:11:45,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:11:45,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:11:45,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:11:45,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:11:45,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:11:45,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:11:45,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:11:45,404 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:11:45,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:11:45,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:11:45,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:11:45,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:11:45,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:11:45,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:11:45,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:11:45,405 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:11:45,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:11:45,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:11:45,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:11:45,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:11:45,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:11:45,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:11:45,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:11:45,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:11:45,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:11:45,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:11:45,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:11:45,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:11:45,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:11:45,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:11:45,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:11:45,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:11:45,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:11:45,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:11:45,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:11:45,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:11:45,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:11:45,408 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:11:45,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:11:45,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:11:45,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:11:45,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bff2dc480380b1206bedd51506b0437b9af4529e78b5beefb811437146f17f [2021-12-07 01:11:45,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:11:45,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:11:45,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:11:45,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:11:45,627 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:11:45,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/reducercommutativity/sum05-2.i [2021-12-07 01:11:45,670 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/data/5b4267686/c2d68c23f2394337835ce27c68bfb774/FLAGf926ab4e0 [2021-12-07 01:11:46,062 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:11:46,063 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/sv-benchmarks/c/reducercommutativity/sum05-2.i [2021-12-07 01:11:46,067 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/data/5b4267686/c2d68c23f2394337835ce27c68bfb774/FLAGf926ab4e0 [2021-12-07 01:11:46,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/data/5b4267686/c2d68c23f2394337835ce27c68bfb774 [2021-12-07 01:11:46,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:11:46,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:11:46,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:11:46,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:11:46,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:11:46,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d17027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46, skipping insertion in model container [2021-12-07 01:11:46,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:11:46,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:11:46,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/sv-benchmarks/c/reducercommutativity/sum05-2.i[1271,1284] [2021-12-07 01:11:46,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:11:46,239 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:11:46,259 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/sv-benchmarks/c/reducercommutativity/sum05-2.i[1271,1284] [2021-12-07 01:11:46,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:11:46,273 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:11:46,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46 WrapperNode [2021-12-07 01:11:46,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:11:46,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:11:46,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:11:46,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:11:46,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,308 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-07 01:11:46,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:11:46,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:11:46,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:11:46,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:11:46,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:11:46,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:11:46,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:11:46,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:11:46,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (1/1) ... [2021-12-07 01:11:46,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:11:46,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:46,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:11:46,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:11:46,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:11:46,390 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-12-07 01:11:46,390 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-12-07 01:11:46,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:11:46,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:11:46,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:11:46,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:11:46,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:11:46,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:11:46,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:11:46,447 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:11:46,449 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:11:46,543 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:11:46,547 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:11:46,547 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 01:11:46,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:11:46 BoogieIcfgContainer [2021-12-07 01:11:46,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:11:46,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:11:46,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:11:46,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:11:46,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:11:46" (1/3) ... [2021-12-07 01:11:46,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3cc946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:11:46, skipping insertion in model container [2021-12-07 01:11:46,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:46" (2/3) ... [2021-12-07 01:11:46,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3cc946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:11:46, skipping insertion in model container [2021-12-07 01:11:46,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:11:46" (3/3) ... [2021-12-07 01:11:46,555 INFO L111 eAbstractionObserver]: Analyzing ICFG sum05-2.i [2021-12-07 01:11:46,559 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:11:46,559 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:11:46,595 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:11:46,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:11:46,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:11:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:11:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:11:46,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:46,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:46,619 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2021-12-07 01:11:46,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:46,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359908137] [2021-12-07 01:11:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:46,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:46,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:11:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:46,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-07 01:11:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-07 01:11:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 01:11:46,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:46,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359908137] [2021-12-07 01:11:46,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359908137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:46,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935951765] [2021-12-07 01:11:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:46,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:46,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:46,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:46,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:11:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:11:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:11:46,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:46,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935951765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:46,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:11:46,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-07 01:11:46,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376527755] [2021-12-07 01:11:46,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:46,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:11:46,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:11:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:11:46,968 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:11:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:46,990 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-07 01:11:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:11:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-07 01:11:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:46,999 INFO L225 Difference]: With dead ends: 50 [2021-12-07 01:11:46,999 INFO L226 Difference]: Without dead ends: 24 [2021-12-07 01:11:47,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:11:47,005 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:47,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-07 01:11:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-07 01:11:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:11:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-07 01:11:47,034 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-12-07 01:11:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:47,034 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-07 01:11:47,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:11:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-07 01:11:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:11:47,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:47,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:47,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:47,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:47,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2021-12-07 01:11:47,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:47,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796196757] [2021-12-07 01:11:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:47,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-07 01:11:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 01:11:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-07 01:11:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:11:47,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:47,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796196757] [2021-12-07 01:11:47,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796196757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:47,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045875861] [2021-12-07 01:11:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:47,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:47,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:47,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:47,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:11:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:11:47,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:11:47,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:47,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045875861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:47,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:11:47,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-07 01:11:47,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693810705] [2021-12-07 01:11:47,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:47,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:11:47,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:11:47,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:11:47,467 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:11:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:47,477 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-07 01:11:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:11:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-07 01:11:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:47,478 INFO L225 Difference]: With dead ends: 42 [2021-12-07 01:11:47,479 INFO L226 Difference]: Without dead ends: 25 [2021-12-07 01:11:47,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:11:47,481 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:47,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-07 01:11:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-07 01:11:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:11:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-07 01:11:47,487 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2021-12-07 01:11:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:47,488 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-07 01:11:47,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:11:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-07 01:11:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-07 01:11:47,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:47,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:47,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:11:47,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:47,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:47,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2021-12-07 01:11:47,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:47,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333375671] [2021-12-07 01:11:47,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:47,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-07 01:11:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-07 01:11:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-07 01:11:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:11:47,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333375671] [2021-12-07 01:11:47,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333375671] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:47,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724352681] [2021-12-07 01:11:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:47,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:47,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:47,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:47,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:11:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:11:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-07 01:11:48,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:48,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724352681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:48,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:11:48,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-07 01:11:48,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839934433] [2021-12-07 01:11:48,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:48,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:11:48,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:11:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:11:48,029 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:11:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:48,039 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-07 01:11:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:11:48,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-07 01:11:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:48,041 INFO L225 Difference]: With dead ends: 39 [2021-12-07 01:11:48,041 INFO L226 Difference]: Without dead ends: 26 [2021-12-07 01:11:48,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:11:48,042 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:48,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-07 01:11:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-07 01:11:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:11:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-07 01:11:48,046 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2021-12-07 01:11:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:48,047 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-07 01:11:48,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:11:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-07 01:11:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 01:11:48,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:48,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:48,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:11:48,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:48,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2021-12-07 01:11:48,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508927533] [2021-12-07 01:11:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:48,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-07 01:11:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-07 01:11:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:11:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:11:48,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508927533] [2021-12-07 01:11:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508927533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100478783] [2021-12-07 01:11:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:48,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:48,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:48,409 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:48,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:11:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:11:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:11:48,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:11:48,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100478783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:48,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:11:48,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-07 01:11:48,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23374102] [2021-12-07 01:11:48,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:48,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:11:48,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:48,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:11:48,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:11:48,553 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:48,579 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-07 01:11:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:11:48,580 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2021-12-07 01:11:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:48,580 INFO L225 Difference]: With dead ends: 54 [2021-12-07 01:11:48,580 INFO L226 Difference]: Without dead ends: 34 [2021-12-07 01:11:48,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:11:48,582 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:48,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-07 01:11:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-07 01:11:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:11:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-07 01:11:48,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2021-12-07 01:11:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:48,586 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-07 01:11:48,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-07 01:11:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-07 01:11:48,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:48,588 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:48,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:11:48,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:48,790 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:48,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2021-12-07 01:11:48,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:48,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488265599] [2021-12-07 01:11:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:48,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-07 01:11:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-07 01:11:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-07 01:11:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 01:11:48,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:48,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488265599] [2021-12-07 01:11:48,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488265599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:48,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636035604] [2021-12-07 01:11:48,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:48,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:48,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:48,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:48,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:11:49,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:11:49,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 01:11:49,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-07 01:11:49,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636035604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:49,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:11:49,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2021-12-07 01:11:49,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286689798] [2021-12-07 01:11:49,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:49,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:11:49,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:11:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:11:49,162 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:11:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:49,189 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-12-07 01:11:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:11:49,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2021-12-07 01:11:49,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:49,190 INFO L225 Difference]: With dead ends: 60 [2021-12-07 01:11:49,190 INFO L226 Difference]: Without dead ends: 38 [2021-12-07 01:11:49,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:11:49,192 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:49,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-07 01:11:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-12-07 01:11:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:11:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-07 01:11:49,197 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 50 [2021-12-07 01:11:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:49,197 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-07 01:11:49,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:11:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-07 01:11:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-07 01:11:49,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:49,198 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:49,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:11:49,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:49,399 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash -402148163, now seen corresponding path program 3 times [2021-12-07 01:11:49,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:49,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566542529] [2021-12-07 01:11:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:49,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:11:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:49,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-07 01:11:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:49,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:11:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 01:11:49,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:49,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566542529] [2021-12-07 01:11:49,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566542529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:49,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604049006] [2021-12-07 01:11:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:11:49,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:49,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:49,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:49,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:11:49,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:11:49,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:49,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:11:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 01:11:49,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-07 01:11:49,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604049006] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:49,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:11:49,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-07 01:11:49,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770368992] [2021-12-07 01:11:49,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:49,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:11:49,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:11:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:11:49,743 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:11:49,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:49,758 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-12-07 01:11:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:11:49,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2021-12-07 01:11:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:49,760 INFO L225 Difference]: With dead ends: 66 [2021-12-07 01:11:49,760 INFO L226 Difference]: Without dead ends: 43 [2021-12-07 01:11:49,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:11:49,761 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:49,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-07 01:11:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-07 01:11:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:11:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-12-07 01:11:49,766 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 54 [2021-12-07 01:11:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:49,767 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-12-07 01:11:49,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:11:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-12-07 01:11:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-07 01:11:49,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:49,768 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:49,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:49,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:49,970 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash 354187703, now seen corresponding path program 4 times [2021-12-07 01:11:49,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:49,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823857737] [2021-12-07 01:11:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:49,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:50,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:11:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:50,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 01:11:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-07 01:11:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-07 01:11:50,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:50,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823857737] [2021-12-07 01:11:50,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823857737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:50,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375433490] [2021-12-07 01:11:50,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:11:50,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:50,159 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:50,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:11:50,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:11:50,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:50,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:11:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 130 proven. 4 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-07 01:11:50,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-07 01:11:50,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375433490] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:50,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:11:50,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-07 01:11:50,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353922868] [2021-12-07 01:11:50,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:50,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:11:50,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:11:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:11:50,343 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:11:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:50,356 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-12-07 01:11:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:11:50,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2021-12-07 01:11:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:50,358 INFO L225 Difference]: With dead ends: 68 [2021-12-07 01:11:50,358 INFO L226 Difference]: Without dead ends: 47 [2021-12-07 01:11:50,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:11:50,359 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:50,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-07 01:11:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-07 01:11:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:11:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-07 01:11:50,363 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 72 [2021-12-07 01:11:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:50,364 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-07 01:11:50,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:11:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-07 01:11:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 01:11:50,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:50,365 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:50,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:11:50,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a477470-fc23-404e-a19b-06e190e993e5/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:50,567 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash -783200653, now seen corresponding path program 5 times [2021-12-07 01:11:50,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:50,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789618955] [2021-12-07 01:11:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:50,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:11:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:53,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 01:11:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:54,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-07 01:11:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat