./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN --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 eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:34:26,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:34:26,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:34:26,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:34:26,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:34:26,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:34:26,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:34:26,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:34:26,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:34:26,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:34:26,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:34:26,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:34:26,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:34:26,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:34:26,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:34:26,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:34:26,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:34:26,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:34:26,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:34:26,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:34:26,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:34:26,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:34:26,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:34:26,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:34:26,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:34:26,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:34:26,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:34:26,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:34:26,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:34:26,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:34:26,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:34:26,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:34:26,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:34:26,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:34:26,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:34:26,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:34:26,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:34:26,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:34:26,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:34:26,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:34:26,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:34:26,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:34:26,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:34:26,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:34:26,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:34:26,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:34:26,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:34:26,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:34:26,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:34:26,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:34:26,341 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:34:26,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:34:26,341 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:34:26,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:34:26,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:34:26,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:34:26,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:34:26,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:34:26,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:34:26,342 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:34:26,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:34:26,343 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:34:26,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:34:26,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:34:26,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:34:26,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:34:26,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:34:26,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:34:26,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:34:26,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:34:26,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:34:26,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:34:26,345 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:34:26,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:34:26,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:34:26,345 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_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 [2022-11-20 10:34:26,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:34:26,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:34:26,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:34:26,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:34:26,627 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:34:26,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2022-11-20 10:34:29,768 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:34:29,980 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:34:29,980 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2022-11-20 10:34:29,987 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/data/357a093ca/7a4234e1923c4df49cdd03d24b000815/FLAG171a45ea8 [2022-11-20 10:34:30,009 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/data/357a093ca/7a4234e1923c4df49cdd03d24b000815 [2022-11-20 10:34:30,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:34:30,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:34:30,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:34:30,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:34:30,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:34:30,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c40a000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30, skipping insertion in model container [2022-11-20 10:34:30,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:34:30,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:34:30,216 WARN L237 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_b43ed425-f8a4-45eb-923c-8787e6fb15b9/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c[946,959] [2022-11-20 10:34:30,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:34:30,253 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:34:30,271 WARN L237 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_b43ed425-f8a4-45eb-923c-8787e6fb15b9/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c[946,959] [2022-11-20 10:34:30,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:34:30,287 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:34:30,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30 WrapperNode [2022-11-20 10:34:30,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:34:30,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:34:30,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:34:30,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:34:30,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,325 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-20 10:34:30,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:34:30,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:34:30,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:34:30,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:34:30,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,355 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:34:30,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:34:30,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:34:30,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:34:30,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (1/1) ... [2022-11-20 10:34:30,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:34:30,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:30,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:34:30,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:34:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:34:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:34:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-11-20 10:34:30,432 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-11-20 10:34:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-11-20 10:34:30,432 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-11-20 10:34:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:34:30,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:34:30,496 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:34:30,498 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:34:30,607 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:34:30,612 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:34:30,613 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 10:34:30,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:34:30 BoogieIcfgContainer [2022-11-20 10:34:30,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:34:30,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:34:30,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:34:30,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:34:30,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:34:30" (1/3) ... [2022-11-20 10:34:30,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55119909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:34:30, skipping insertion in model container [2022-11-20 10:34:30,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:34:30" (2/3) ... [2022-11-20 10:34:30,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55119909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:34:30, skipping insertion in model container [2022-11-20 10:34:30,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:34:30" (3/3) ... [2022-11-20 10:34:30,623 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2022-11-20 10:34:30,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:34:30,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:34:30,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:34:30,703 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@63b447c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:34:30,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:34:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 10:34:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:34:30,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:30,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:30,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2022-11-20 10:34:30,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:30,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192478925] [2022-11-20 10:34:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:30,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:30,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:31,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:31,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192478925] [2022-11-20 10:34:31,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192478925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:31,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:31,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:34:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381525037] [2022-11-20 10:34:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:31,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:31,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:31,042 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 10:34:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:31,155 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-20 10:34:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:34:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-20 10:34:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:31,165 INFO L225 Difference]: With dead ends: 43 [2022-11-20 10:34:31,166 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 10:34:31,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:31,182 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:31,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:34:31,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 10:34:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-20 10:34:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 10:34:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-20 10:34:31,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2022-11-20 10:34:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:31,232 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-20 10:34:31,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 10:34:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-20 10:34:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:34:31,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:31,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:31,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:34:31,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:31,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2022-11-20 10:34:31,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:31,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908640600] [2022-11-20 10:34:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:31,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:31,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:31,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908640600] [2022-11-20 10:34:31,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908640600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:31,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:31,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:34:31,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175996230] [2022-11-20 10:34:31,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:31,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:31,429 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 10:34:31,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:31,459 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-20 10:34:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:34:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-20 10:34:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:31,461 INFO L225 Difference]: With dead ends: 33 [2022-11-20 10:34:31,461 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 10:34:31,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:31,462 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:31,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:34:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 10:34:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-20 10:34:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 10:34:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-20 10:34:31,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2022-11-20 10:34:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:31,478 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-20 10:34:31,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 10:34:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-20 10:34:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:34:31,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:31,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:34:31,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2022-11-20 10:34:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:31,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303111091] [2022-11-20 10:34:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:31,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:31,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:31,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:34:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:31,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:31,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303111091] [2022-11-20 10:34:31,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303111091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:31,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770126209] [2022-11-20 10:34:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:31,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:31,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:31,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:31,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:34:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:31,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:34:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:31,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:32,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770126209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:32,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:32,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-11-20 10:34:32,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598531698] [2022-11-20 10:34:32,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:34:32,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:34:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:34:32,249 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 10:34:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:32,478 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-11-20 10:34:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:34:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2022-11-20 10:34:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:32,482 INFO L225 Difference]: With dead ends: 55 [2022-11-20 10:34:32,483 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 10:34:32,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:34:32,485 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:32,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 112 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:34:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 10:34:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-20 10:34:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 10:34:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-20 10:34:32,493 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2022-11-20 10:34:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:32,494 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-20 10:34:32,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 10:34:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-20 10:34:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:34:32,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:32,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:32,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:32,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:32,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:32,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2022-11-20 10:34:32,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:32,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657092286] [2022-11-20 10:34:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:32,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:32,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:32,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:32,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:32,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657092286] [2022-11-20 10:34:32,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657092286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:32,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463347512] [2022-11-20 10:34:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:32,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:32,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:32,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:32,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:34:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:32,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:34:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:33,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:33,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463347512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:33,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:33,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-11-20 10:34:33,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071352574] [2022-11-20 10:34:33,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:33,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:34:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:33,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:34:33,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:34:33,302 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 10:34:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:33,544 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-11-20 10:34:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:34:33,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2022-11-20 10:34:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:33,547 INFO L225 Difference]: With dead ends: 51 [2022-11-20 10:34:33,548 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 10:34:33,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:34:33,549 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:33,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 92 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:34:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 10:34:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-20 10:34:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-20 10:34:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-11-20 10:34:33,561 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2022-11-20 10:34:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:33,562 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-11-20 10:34:33,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 10:34:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-11-20 10:34:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 10:34:33,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:33,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:33,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:33,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:33,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2022-11-20 10:34:33,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:33,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655701794] [2022-11-20 10:34:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:33,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:33,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:33,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:33,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:33,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:34:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:33,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-20 10:34:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:34:33,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:33,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655701794] [2022-11-20 10:34:33,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655701794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:33,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001725776] [2022-11-20 10:34:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:33,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:33,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:33,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:33,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:34:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:34,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:34:34,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:34:34,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:34:34,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001725776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:34,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:34,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2022-11-20 10:34:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190505903] [2022-11-20 10:34:34,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:34,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:34:34,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:34,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:34:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:34:34,539 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 10:34:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:34,796 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2022-11-20 10:34:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:34:34,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2022-11-20 10:34:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:34,804 INFO L225 Difference]: With dead ends: 105 [2022-11-20 10:34:34,804 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 10:34:34,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:34:34,809 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:34,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 95 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:34:34,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 10:34:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 10:34:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-20 10:34:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2022-11-20 10:34:34,840 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2022-11-20 10:34:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:34,841 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2022-11-20 10:34:34,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 10:34:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2022-11-20 10:34:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:34:34,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:34,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:34,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:35,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:35,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2022-11-20 10:34:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:35,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718929062] [2022-11-20 10:34:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:35,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:35,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:35,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:35,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:35,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:35,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:34:35,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:35,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718929062] [2022-11-20 10:34:35,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718929062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677579103] [2022-11-20 10:34:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:35,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:35,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:35,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:35,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:34:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:35,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:34:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:34:35,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:34:35,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677579103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:35,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:35,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2022-11-20 10:34:35,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051170517] [2022-11-20 10:34:35,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:35,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:34:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:34:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:34:35,753 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 10:34:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:36,216 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2022-11-20 10:34:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:34:36,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2022-11-20 10:34:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:36,219 INFO L225 Difference]: With dead ends: 177 [2022-11-20 10:34:36,219 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 10:34:36,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:34:36,221 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:36,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 222 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:34:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 10:34:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-11-20 10:34:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2022-11-20 10:34:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2022-11-20 10:34:36,246 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2022-11-20 10:34:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:36,247 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2022-11-20 10:34:36,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 10:34:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2022-11-20 10:34:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 10:34:36,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:36,255 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:36,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:36,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:36,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2022-11-20 10:34:36,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:36,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771269756] [2022-11-20 10:34:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:36,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 10:34:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 10:34:36,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:36,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771269756] [2022-11-20 10:34:36,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771269756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:36,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620288193] [2022-11-20 10:34:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:36,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:36,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:36,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:36,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:34:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:34:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 10:34:36,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:34:37,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620288193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:37,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:37,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2022-11-20 10:34:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597632061] [2022-11-20 10:34:37,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:34:37,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:34:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:34:37,541 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-20 10:34:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:38,013 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2022-11-20 10:34:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:34:38,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 51 [2022-11-20 10:34:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:38,021 INFO L225 Difference]: With dead ends: 255 [2022-11-20 10:34:38,021 INFO L226 Difference]: Without dead ends: 155 [2022-11-20 10:34:38,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:34:38,024 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 100 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:38,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 158 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:34:38,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-20 10:34:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2022-11-20 10:34:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2022-11-20 10:34:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2022-11-20 10:34:38,063 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2022-11-20 10:34:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:38,063 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2022-11-20 10:34:38,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-20 10:34:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2022-11-20 10:34:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 10:34:38,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:38,074 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:38,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:38,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2022-11-20 10:34:38,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:38,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977499369] [2022-11-20 10:34:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:38,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:34:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 10:34:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 10:34:38,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:38,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977499369] [2022-11-20 10:34:38,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977499369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:38,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901941333] [2022-11-20 10:34:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:38,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:38,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:38,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:38,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:34:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:38,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:34:38,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 10:34:38,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 10:34:39,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901941333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:39,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:39,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 19 [2022-11-20 10:34:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541102414] [2022-11-20 10:34:39,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:34:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:39,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:34:39,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:34:39,298 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-20 10:34:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:39,693 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2022-11-20 10:34:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:34:39,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) Word has length 79 [2022-11-20 10:34:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:39,695 INFO L225 Difference]: With dead ends: 241 [2022-11-20 10:34:39,695 INFO L226 Difference]: Without dead ends: 120 [2022-11-20 10:34:39,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:34:39,697 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:39,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 167 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:34:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-20 10:34:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2022-11-20 10:34:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 19 states have call successors, (19), 10 states have call predecessors, (19), 12 states have return successors, (52), 20 states have call predecessors, (52), 19 states have call successors, (52) [2022-11-20 10:34:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2022-11-20 10:34:39,711 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 79 [2022-11-20 10:34:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:39,711 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2022-11-20 10:34:39,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-20 10:34:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2022-11-20 10:34:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-20 10:34:39,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:39,714 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:39,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:39,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:34:39,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:39,919 INFO L85 PathProgramCache]: Analyzing trace with hash 502211684, now seen corresponding path program 2 times [2022-11-20 10:34:39,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:39,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044928125] [2022-11-20 10:34:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:39,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:34:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:34:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 10:34:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 140 proven. 160 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-20 10:34:40,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:40,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044928125] [2022-11-20 10:34:40,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044928125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:40,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819623552] [2022-11-20 10:34:40,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:40,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:40,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:40,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:40,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:34:40,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:34:40,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:34:40,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 133 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-11-20 10:34:41,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 141 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-20 10:34:42,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819623552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:42,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:42,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 13] total 32 [2022-11-20 10:34:42,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934441342] [2022-11-20 10:34:42,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:42,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 10:34:42,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 10:34:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:34:42,141 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2022-11-20 10:34:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:43,052 INFO L93 Difference]: Finished difference Result 230 states and 432 transitions. [2022-11-20 10:34:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 10:34:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) Word has length 148 [2022-11-20 10:34:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:43,054 INFO L225 Difference]: With dead ends: 230 [2022-11-20 10:34:43,054 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 10:34:43,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 321 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 10:34:43,057 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 206 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:43,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 264 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:34:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 10:34:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2022-11-20 10:34:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (36), 17 states have call predecessors, (36), 17 states have call successors, (36) [2022-11-20 10:34:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2022-11-20 10:34:43,091 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 148 [2022-11-20 10:34:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:43,091 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2022-11-20 10:34:43,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2022-11-20 10:34:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2022-11-20 10:34:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 10:34:43,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:43,093 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:43,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:43,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:43,299 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:43,300 INFO L85 PathProgramCache]: Analyzing trace with hash 882144864, now seen corresponding path program 1 times [2022-11-20 10:34:43,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:43,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707922498] [2022-11-20 10:34:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:43,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:34:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 10:34:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-20 10:34:43,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:43,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707922498] [2022-11-20 10:34:43,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707922498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:43,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094202092] [2022-11-20 10:34:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:43,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:43,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:43,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:34:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:34:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-20 10:34:43,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-20 10:34:44,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094202092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:44,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:44,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 19 [2022-11-20 10:34:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147202774] [2022-11-20 10:34:44,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:44,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:34:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:34:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:34:44,292 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-20 10:34:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:44,620 INFO L93 Difference]: Finished difference Result 196 states and 283 transitions. [2022-11-20 10:34:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:34:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) Word has length 92 [2022-11-20 10:34:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:44,622 INFO L225 Difference]: With dead ends: 196 [2022-11-20 10:34:44,623 INFO L226 Difference]: Without dead ends: 109 [2022-11-20 10:34:44,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:34:44,624 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:44,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 196 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:34:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-20 10:34:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-11-20 10:34:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 71 states have internal predecessors, (88), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2022-11-20 10:34:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2022-11-20 10:34:44,638 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 92 [2022-11-20 10:34:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:44,639 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2022-11-20 10:34:44,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-20 10:34:44,639 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2022-11-20 10:34:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-20 10:34:44,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:44,641 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:44,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:44,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:34:44,847 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:44,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash -574358487, now seen corresponding path program 2 times [2022-11-20 10:34:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:44,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584698943] [2022-11-20 10:34:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:44,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:34:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:34:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 10:34:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:34:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:34:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:34:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 58 proven. 98 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-20 10:34:45,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:34:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584698943] [2022-11-20 10:34:45,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584698943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80405308] [2022-11-20 10:34:45,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:45,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:34:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:34:45,302 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:34:45,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:34:45,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:34:45,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:45,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:34:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 55 proven. 61 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-20 10:34:45,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 57 proven. 63 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-20 10:34:46,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80405308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:46,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:34:46,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 11] total 24 [2022-11-20 10:34:46,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408305335] [2022-11-20 10:34:46,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:46,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:34:46,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:34:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:34:46,187 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2022-11-20 10:34:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:46,518 INFO L93 Difference]: Finished difference Result 206 states and 292 transitions. [2022-11-20 10:34:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:34:46,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) Word has length 107 [2022-11-20 10:34:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:46,520 INFO L225 Difference]: With dead ends: 206 [2022-11-20 10:34:46,520 INFO L226 Difference]: Without dead ends: 113 [2022-11-20 10:34:46,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 231 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:34:46,522 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:46,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 163 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:34:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-20 10:34:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2022-11-20 10:34:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 69 states have internal predecessors, (86), 18 states have call successors, (18), 13 states have call predecessors, (18), 11 states have return successors, (31), 17 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-20 10:34:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2022-11-20 10:34:46,532 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 107 [2022-11-20 10:34:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:46,532 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2022-11-20 10:34:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2022-11-20 10:34:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2022-11-20 10:34:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 10:34:46,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:46,535 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:46,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:46,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:34:46,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:34:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:46,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2118534433, now seen corresponding path program 3 times [2022-11-20 10:34:46,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:34:46,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652514436] [2022-11-20 10:34:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:46,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:34:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:34:46,756 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:34:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:34:46,797 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:34:46,798 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:34:46,799 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 10:34:46,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:34:46,806 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:46,812 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 10:34:46,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:34:46 BoogieIcfgContainer [2022-11-20 10:34:46,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 10:34:46,879 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 10:34:46,879 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 10:34:46,879 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 10:34:46,880 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:34:30" (3/4) ... [2022-11-20 10:34:46,883 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 10:34:46,960 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 10:34:46,964 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 10:34:46,964 INFO L158 Benchmark]: Toolchain (without parser) took 16948.64ms. Allocated memory was 153.1MB in the beginning and 268.4MB in the end (delta: 115.3MB). Free memory was 119.7MB in the beginning and 159.0MB in the end (delta: -39.3MB). Peak memory consumption was 74.6MB. Max. memory is 16.1GB. [2022-11-20 10:34:46,965 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 121.6MB. Free memory is still 93.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:34:46,965 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.56ms. Allocated memory is still 153.1MB. Free memory was 119.7MB in the beginning and 123.6MB in the end (delta: -3.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 10:34:46,965 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.18ms. Allocated memory is still 153.1MB. Free memory was 123.6MB in the beginning and 122.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:34:46,966 INFO L158 Benchmark]: Boogie Preprocessor took 31.41ms. Allocated memory is still 153.1MB. Free memory was 122.3MB in the beginning and 121.6MB in the end (delta: 715.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:34:46,966 INFO L158 Benchmark]: RCFGBuilder took 256.54ms. Allocated memory is still 153.1MB. Free memory was 121.6MB in the beginning and 111.1MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 10:34:46,966 INFO L158 Benchmark]: TraceAbstraction took 16261.10ms. Allocated memory was 153.1MB in the beginning and 268.4MB in the end (delta: 115.3MB). Free memory was 110.4MB in the beginning and 163.2MB in the end (delta: -52.7MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. [2022-11-20 10:34:46,967 INFO L158 Benchmark]: Witness Printer took 85.08ms. Allocated memory is still 268.4MB. Free memory was 163.2MB in the beginning and 159.0MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:34:46,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 121.6MB. Free memory is still 93.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.56ms. Allocated memory is still 153.1MB. Free memory was 119.7MB in the beginning and 123.6MB in the end (delta: -3.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.18ms. Allocated memory is still 153.1MB. Free memory was 123.6MB in the beginning and 122.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.41ms. Allocated memory is still 153.1MB. Free memory was 122.3MB in the beginning and 121.6MB in the end (delta: 715.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 256.54ms. Allocated memory is still 153.1MB. Free memory was 121.6MB in the beginning and 111.1MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 16261.10ms. Allocated memory was 153.1MB in the beginning and 268.4MB in the end (delta: 115.3MB). Free memory was 110.4MB in the beginning and 163.2MB in the end (delta: -52.7MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. * Witness Printer took 85.08ms. Allocated memory is still 268.4MB. Free memory was 163.2MB in the beginning and 159.0MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 5; VAL [x=5] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L39] int result = fibo1(x); [L40] COND TRUE result == 5 VAL [result=5, x=5] [L41] reach_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.1s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 767 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 698 mSDsluCounter, 1714 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1410 mSDsCounter, 755 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3283 IncrementalHoareTripleChecker+Invalid, 4038 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 755 mSolverCounterUnsat, 304 mSDtfsCounter, 3283 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1543 GetRequests, 1283 SyntacticMatches, 34 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, InterpolantAutomatonStates: 169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 125 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 1321 NumberOfCodeBlocks, 1321 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1783 ConstructedInterpolants, 0 QuantifiedInterpolants, 3528 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1539 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 2771/3702 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-20 10:34:46,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b43ed425-f8a4-45eb-923c-8787e6fb15b9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE