./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R --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 abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- 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-38b53e6 [2022-11-25 17:18:38,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:18:38,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:18:38,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:18:38,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:18:38,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:18:38,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:18:38,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:18:38,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:18:38,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:18:38,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:18:38,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:18:38,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:18:38,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:18:38,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:18:38,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:18:38,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:18:38,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:18:38,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:18:38,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:18:38,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:18:38,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:18:38,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:18:38,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:18:38,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:18:38,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:18:38,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:18:38,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:18:38,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:18:38,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:18:38,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:18:38,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:18:38,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:18:38,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:18:38,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:18:38,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:18:38,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:18:38,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:18:38,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:18:38,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:18:38,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:18:38,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:18:38,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:18:38,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:18:38,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:18:38,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:18:38,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:18:38,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:18:38,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:18:38,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:18:38,425 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:18:38,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:18:38,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:18:38,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:18:38,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:18:38,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:18:38,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:18:38,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:18:38,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:18:38,428 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:18:38,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:18:38,428 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:18:38,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:18:38,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:18:38,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:18:38,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:18:38,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:38,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:18:38,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:18:38,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:18:38,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:18:38,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:18:38,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:18:38,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:18:38,432 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:18:38,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:18:38,432 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2022-11-25 17:18:38,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:18:38,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:18:38,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:18:38,828 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:18:38,829 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:18:38,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/loop-simple/deep-nested.c [2022-11-25 17:18:41,790 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:18:42,024 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:18:42,025 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/sv-benchmarks/c/loop-simple/deep-nested.c [2022-11-25 17:18:42,031 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/data/5d12855f6/0f7cbfeddb1a4b37904b850b7116a3e0/FLAG892aa45ef [2022-11-25 17:18:42,051 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/data/5d12855f6/0f7cbfeddb1a4b37904b850b7116a3e0 [2022-11-25 17:18:42,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:18:42,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:18:42,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:42,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:18:42,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:18:42,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f8583fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42, skipping insertion in model container [2022-11-25 17:18:42,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:18:42,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:18:42,295 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_a2f732a7-acd7-4944-b0ec-c64400cf7be3/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-11-25 17:18:42,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:42,316 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:18:42,335 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_a2f732a7-acd7-4944-b0ec-c64400cf7be3/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-11-25 17:18:42,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:18:42,349 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:18:42,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42 WrapperNode [2022-11-25 17:18:42,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:18:42,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:18:42,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:18:42,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:18:42,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,386 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-11-25 17:18:42,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:18:42,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:18:42,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:18:42,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:18:42,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:18:42,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:18:42,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:18:42,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:18:42,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (1/1) ... [2022-11-25 17:18:42,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:42,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:42,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:18:42,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:18:42,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:18:42,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:18:42,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:18:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:18:42,544 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:18:42,546 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:18:42,698 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:18:42,706 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:18:42,709 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 17:18:42,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:18:42 BoogieIcfgContainer [2022-11-25 17:18:42,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:18:42,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:18:42,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:18:42,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:18:42,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:18:42" (1/3) ... [2022-11-25 17:18:42,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133ddbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:18:42, skipping insertion in model container [2022-11-25 17:18:42,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:18:42" (2/3) ... [2022-11-25 17:18:42,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133ddbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:18:42, skipping insertion in model container [2022-11-25 17:18:42,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:18:42" (3/3) ... [2022-11-25 17:18:42,721 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2022-11-25 17:18:42,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:18:42,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:18:42,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:18:42,823 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;@5066ae87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:18:42,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:18:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:18:42,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:42,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:42,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:42,840 INFO L85 PathProgramCache]: Analyzing trace with hash -180366952, now seen corresponding path program 1 times [2022-11-25 17:18:42,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:42,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077162446] [2022-11-25 17:18:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:42,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:43,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:43,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077162446] [2022-11-25 17:18:43,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077162446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:43,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:43,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:18:43,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624600585] [2022-11-25 17:18:43,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:43,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:18:43,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:18:43,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:18:43,396 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:43,541 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2022-11-25 17:18:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:18:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 17:18:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:43,554 INFO L225 Difference]: With dead ends: 39 [2022-11-25 17:18:43,556 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 17:18:43,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:18:43,565 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:43,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:18:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 17:18:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-11-25 17:18:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-25 17:18:43,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-11-25 17:18:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:43,598 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 17:18:43,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-25 17:18:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 17:18:43,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:43,600 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:43,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:18:43,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash -303894894, now seen corresponding path program 1 times [2022-11-25 17:18:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:43,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501012332] [2022-11-25 17:18:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:43,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:18:44,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501012332] [2022-11-25 17:18:44,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501012332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:44,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:44,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:18:44,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903836788] [2022-11-25 17:18:44,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:44,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:18:44,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:18:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:18:44,189 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:44,272 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-25 17:18:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:18:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 17:18:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:44,276 INFO L225 Difference]: With dead ends: 32 [2022-11-25 17:18:44,276 INFO L226 Difference]: Without dead ends: 30 [2022-11-25 17:18:44,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:18:44,284 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:44,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:18:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-25 17:18:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-25 17:18:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-11-25 17:18:44,311 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2022-11-25 17:18:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:44,312 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-11-25 17:18:44,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-11-25 17:18:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 17:18:44,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:44,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:44,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:18:44,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1056396073, now seen corresponding path program 1 times [2022-11-25 17:18:44,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:44,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004622607] [2022-11-25 17:18:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:44,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004622607] [2022-11-25 17:18:44,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004622607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:44,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674697474] [2022-11-25 17:18:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:44,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:44,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:44,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:44,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:18:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:44,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:18:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:18:44,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:44,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674697474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:44,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:18:44,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-25 17:18:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112466010] [2022-11-25 17:18:44,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:44,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:18:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:18:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:18:44,793 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:44,915 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-11-25 17:18:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:18:44,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 17:18:44,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:44,919 INFO L225 Difference]: With dead ends: 67 [2022-11-25 17:18:44,919 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 17:18:44,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:18:44,923 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:44,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 18 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:18:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 17:18:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-11-25 17:18:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-25 17:18:44,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2022-11-25 17:18:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:44,940 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-25 17:18:44,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-25 17:18:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 17:18:44,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:44,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:44,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:45,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 17:18:45,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1212980556, now seen corresponding path program 1 times [2022-11-25 17:18:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938499007] [2022-11-25 17:18:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:45,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:18:45,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:45,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938499007] [2022-11-25 17:18:45,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938499007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:45,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159821429] [2022-11-25 17:18:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:45,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:45,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:45,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:45,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:18:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:45,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:18:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:18:45,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:45,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159821429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:45,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:18:45,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-25 17:18:45,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804033423] [2022-11-25 17:18:45,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:45,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:18:45,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:18:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:18:45,526 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:45,653 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2022-11-25 17:18:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:18:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-25 17:18:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:45,656 INFO L225 Difference]: With dead ends: 76 [2022-11-25 17:18:45,656 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 17:18:45,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:18:45,660 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:45,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:18:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 17:18:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2022-11-25 17:18:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-25 17:18:45,683 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2022-11-25 17:18:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:45,684 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-25 17:18:45,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-25 17:18:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:18:45,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:45,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:45,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:45,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:45,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1901462963, now seen corresponding path program 1 times [2022-11-25 17:18:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:45,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919405878] [2022-11-25 17:18:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:45,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:18:46,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:46,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919405878] [2022-11-25 17:18:46,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919405878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:46,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458222963] [2022-11-25 17:18:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:46,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:46,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:46,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:46,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:18:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:46,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:18:46,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:18:46,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:46,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458222963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:46,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:18:46,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-25 17:18:46,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092974963] [2022-11-25 17:18:46,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:46,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:18:46,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:46,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:18:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:18:46,287 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:46,385 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-11-25 17:18:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:18:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 17:18:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:46,386 INFO L225 Difference]: With dead ends: 76 [2022-11-25 17:18:46,386 INFO L226 Difference]: Without dead ends: 48 [2022-11-25 17:18:46,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:18:46,388 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:46,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:18:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-25 17:18:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-11-25 17:18:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-25 17:18:46,400 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 21 [2022-11-25 17:18:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:46,400 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-25 17:18:46,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-25 17:18:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 17:18:46,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:46,403 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:46,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:46,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:46,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1208008852, now seen corresponding path program 1 times [2022-11-25 17:18:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:46,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075226870] [2022-11-25 17:18:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:46,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:18:46,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:46,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075226870] [2022-11-25 17:18:46,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075226870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090702033] [2022-11-25 17:18:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:46,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:46,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:46,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:46,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:18:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:18:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:18:47,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:18:47,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090702033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:47,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:47,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 17:18:47,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869670968] [2022-11-25 17:18:47,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:47,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:18:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:18:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:18:47,405 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:49,631 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2022-11-25 17:18:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 17:18:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-25 17:18:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:49,633 INFO L225 Difference]: With dead ends: 186 [2022-11-25 17:18:49,633 INFO L226 Difference]: Without dead ends: 111 [2022-11-25 17:18:49,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=509, Invalid=1843, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:18:49,635 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 436 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:49,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 64 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:18:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-25 17:18:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2022-11-25 17:18:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-11-25 17:18:49,662 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 27 [2022-11-25 17:18:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:49,663 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-11-25 17:18:49,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-11-25 17:18:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:18:49,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:49,664 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:49,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:49,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:18:49,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:49,871 INFO L85 PathProgramCache]: Analyzing trace with hash -971666175, now seen corresponding path program 2 times [2022-11-25 17:18:49,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:49,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484395468] [2022-11-25 17:18:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 17:18:50,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:50,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484395468] [2022-11-25 17:18:50,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484395468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:50,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70807299] [2022-11-25 17:18:50,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:18:50,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:50,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:50,258 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:50,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:18:50,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:18:50,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:18:50,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-25 17:18:50,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:50,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70807299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:50,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:18:50,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-25 17:18:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267582512] [2022-11-25 17:18:50,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:18:50,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:50,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:18:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:18:50,489 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:50,562 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-11-25 17:18:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:18:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-25 17:18:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:50,565 INFO L225 Difference]: With dead ends: 73 [2022-11-25 17:18:50,565 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 17:18:50,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:18:50,567 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:50,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:18:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 17:18:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-11-25 17:18:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-11-25 17:18:50,608 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 48 [2022-11-25 17:18:50,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:50,608 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-11-25 17:18:50,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-11-25 17:18:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 17:18:50,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:50,610 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:50,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:50,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:18:50,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash -414140084, now seen corresponding path program 3 times [2022-11-25 17:18:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:50,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275210986] [2022-11-25 17:18:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:50,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-25 17:18:51,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:51,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275210986] [2022-11-25 17:18:51,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275210986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:51,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357663281] [2022-11-25 17:18:51,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:18:51,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:51,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:51,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:51,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:18:51,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:18:51,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:51,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:18:51,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-25 17:18:51,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357663281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:51,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:18:51,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-25 17:18:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812285871] [2022-11-25 17:18:51,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:51,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:18:51,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:51,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:18:51,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:18:51,531 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:51,604 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2022-11-25 17:18:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:18:51,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-25 17:18:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:51,607 INFO L225 Difference]: With dead ends: 117 [2022-11-25 17:18:51,607 INFO L226 Difference]: Without dead ends: 115 [2022-11-25 17:18:51,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:18:51,609 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:51,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:18:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-25 17:18:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2022-11-25 17:18:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2022-11-25 17:18:51,648 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 63 [2022-11-25 17:18:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:51,649 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2022-11-25 17:18:51,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2022-11-25 17:18:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 17:18:51,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:51,651 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:51,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 17:18:51,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:51,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1648728410, now seen corresponding path program 4 times [2022-11-25 17:18:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:51,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355305565] [2022-11-25 17:18:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-25 17:18:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355305565] [2022-11-25 17:18:52,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355305565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934198768] [2022-11-25 17:18:52,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:18:52,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:52,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:52,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:52,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:18:52,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:18:52,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:18:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 88 proven. 71 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-25 17:18:52,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 30 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-25 17:18:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934198768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:53,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-11-25 17:18:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025517744] [2022-11-25 17:18:53,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:53,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:18:53,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:18:53,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:18:53,108 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:53,776 INFO L93 Difference]: Finished difference Result 251 states and 317 transitions. [2022-11-25 17:18:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:18:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-25 17:18:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:53,777 INFO L225 Difference]: With dead ends: 251 [2022-11-25 17:18:53,777 INFO L226 Difference]: Without dead ends: 120 [2022-11-25 17:18:53,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:18:53,779 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:53,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 75 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:18:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-25 17:18:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2022-11-25 17:18:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-11-25 17:18:53,819 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 75 [2022-11-25 17:18:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:53,819 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-11-25 17:18:53,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-11-25 17:18:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-25 17:18:53,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:53,825 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:53,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:54,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:54,032 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:54,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1372721946, now seen corresponding path program 5 times [2022-11-25 17:18:54,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:54,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414028517] [2022-11-25 17:18:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:54,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 20 proven. 270 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2022-11-25 17:18:54,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414028517] [2022-11-25 17:18:54,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414028517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504255362] [2022-11-25 17:18:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:18:54,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:54,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:54,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:18:56,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-25 17:18:56,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:56,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:18:56,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 438 proven. 84 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-25 17:18:56,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 420 proven. 102 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-25 17:18:56,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504255362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:56,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:56,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-11-25 17:18:56,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645126277] [2022-11-25 17:18:56,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:56,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:18:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:18:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:18:56,649 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:58,433 INFO L93 Difference]: Finished difference Result 514 states and 609 transitions. [2022-11-25 17:18:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:18:58,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-11-25 17:18:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:58,436 INFO L225 Difference]: With dead ends: 514 [2022-11-25 17:18:58,436 INFO L226 Difference]: Without dead ends: 330 [2022-11-25 17:18:58,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 17:18:58,438 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 186 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:58,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 65 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:18:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-25 17:18:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 231. [2022-11-25 17:18:58,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.1) internal successors, (253), 230 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 253 transitions. [2022-11-25 17:18:58,509 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 253 transitions. Word has length 105 [2022-11-25 17:18:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:58,509 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 253 transitions. [2022-11-25 17:18:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 253 transitions. [2022-11-25 17:18:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-25 17:18:58,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:58,519 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:58,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:58,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:18:58,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:58,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1843530466, now seen corresponding path program 6 times [2022-11-25 17:18:58,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:58,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324871570] [2022-11-25 17:18:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:58,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-25 17:19:00,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:00,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324871570] [2022-11-25 17:19:00,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324871570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:00,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890299384] [2022-11-25 17:19:00,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:19:00,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:00,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:00,189 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:00,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:19:00,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:19:00,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:19:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 2534 proven. 902 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2022-11-25 17:19:00,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 3436 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2022-11-25 17:19:01,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890299384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:01,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:01,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2022-11-25 17:19:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417919384] [2022-11-25 17:19:01,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:19:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:19:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:19:01,560 INFO L87 Difference]: Start difference. First operand 231 states and 253 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:03,952 INFO L93 Difference]: Finished difference Result 1121 states and 1280 transitions. [2022-11-25 17:19:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 17:19:03,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2022-11-25 17:19:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:03,957 INFO L225 Difference]: With dead ends: 1121 [2022-11-25 17:19:03,957 INFO L226 Difference]: Without dead ends: 895 [2022-11-25 17:19:03,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 17:19:03,960 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:03,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 54 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:19:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-25 17:19:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 457. [2022-11-25 17:19:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.081140350877193) internal successors, (493), 456 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 493 transitions. [2022-11-25 17:19:04,047 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 493 transitions. Word has length 228 [2022-11-25 17:19:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:04,048 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 493 transitions. [2022-11-25 17:19:04,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 493 transitions. [2022-11-25 17:19:04,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-11-25 17:19:04,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:04,066 INFO L195 NwaCegarLoop]: trace histogram [120, 119, 119, 17, 16, 16, 8, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:04,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:04,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:04,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:04,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1421354286, now seen corresponding path program 7 times [2022-11-25 17:19:04,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:04,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237116506] [2022-11-25 17:19:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:04,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 23893 backedges. 44 proven. 2781 refuted. 0 times theorem prover too weak. 21068 trivial. 0 not checked. [2022-11-25 17:19:07,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237116506] [2022-11-25 17:19:07,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237116506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806095736] [2022-11-25 17:19:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:19:07,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:07,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:07,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:19:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:07,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:19:07,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 23893 backedges. 4986 proven. 206 refuted. 0 times theorem prover too weak. 18701 trivial. 0 not checked. [2022-11-25 17:19:08,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23893 backedges. 4986 proven. 206 refuted. 0 times theorem prover too weak. 18701 trivial. 0 not checked. [2022-11-25 17:19:08,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806095736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:08,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:08,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-11-25 17:19:08,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447493038] [2022-11-25 17:19:08,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:08,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:19:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:08,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:19:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:19:08,539 INFO L87 Difference]: Start difference. First operand 457 states and 493 transitions. Second operand has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:18,265 INFO L93 Difference]: Finished difference Result 2182 states and 2489 transitions. [2022-11-25 17:19:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-25 17:19:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 456 [2022-11-25 17:19:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:18,271 INFO L225 Difference]: With dead ends: 2182 [2022-11-25 17:19:18,272 INFO L226 Difference]: Without dead ends: 1730 [2022-11-25 17:19:18,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1583, Invalid=8719, Unknown=0, NotChecked=0, Total=10302 [2022-11-25 17:19:18,277 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 425 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:18,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 84 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 17:19:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2022-11-25 17:19:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1563. [2022-11-25 17:19:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 1.0435339308578746) internal successors, (1630), 1562 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 1630 transitions. [2022-11-25 17:19:18,577 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 1630 transitions. Word has length 456 [2022-11-25 17:19:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:18,578 INFO L495 AbstractCegarLoop]: Abstraction has 1563 states and 1630 transitions. [2022-11-25 17:19:18,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 1630 transitions. [2022-11-25 17:19:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1561 [2022-11-25 17:19:18,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:18,627 INFO L195 NwaCegarLoop]: trace histogram [457, 456, 456, 48, 47, 47, 8, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:18,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:19:18,829 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash -175132519, now seen corresponding path program 8 times [2022-11-25 17:19:18,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:18,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673636363] [2022-11-25 17:19:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:18,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 337414 backedges. 75 proven. 14944 refuted. 0 times theorem prover too weak. 322395 trivial. 0 not checked. [2022-11-25 17:19:31,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673636363] [2022-11-25 17:19:31,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673636363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774872202] [2022-11-25 17:19:31,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:19:31,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:31,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:31,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:19:31,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:19:31,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:31,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:19:31,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 337414 backedges. 53384 proven. 1076 refuted. 0 times theorem prover too weak. 282954 trivial. 0 not checked. [2022-11-25 17:19:32,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 337414 backedges. 52748 proven. 1712 refuted. 0 times theorem prover too weak. 282954 trivial. 0 not checked. [2022-11-25 17:19:34,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774872202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:34,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:34,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 23] total 57 [2022-11-25 17:19:34,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644974429] [2022-11-25 17:19:34,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:34,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-25 17:19:34,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-25 17:19:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2818, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 17:19:34,324 INFO L87 Difference]: Start difference. First operand 1563 states and 1630 transitions. Second operand has 57 states, 57 states have (on average 3.456140350877193) internal successors, (197), 57 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:20:40,983 INFO L93 Difference]: Finished difference Result 4921 states and 5667 transitions. [2022-11-25 17:20:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:20:40,983 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.456140350877193) internal successors, (197), 57 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1560 [2022-11-25 17:20:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:20:40,994 INFO L225 Difference]: With dead ends: 4921 [2022-11-25 17:20:40,994 INFO L226 Difference]: Without dead ends: 3363 [2022-11-25 17:20:40,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3162 GetRequests, 3081 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=991, Invalid=5814, Unknown=1, NotChecked=0, Total=6806 [2022-11-25 17:20:40,999 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 240 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:20:40,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 123 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-25 17:20:41,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-11-25 17:20:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3362. [2022-11-25 17:20:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 3361 states have (on average 1.0202320737875632) internal successors, (3429), 3361 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 3429 transitions. [2022-11-25 17:20:41,583 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 3429 transitions. Word has length 1560 [2022-11-25 17:20:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:20:41,583 INFO L495 AbstractCegarLoop]: Abstraction has 3362 states and 3429 transitions. [2022-11-25 17:20:41,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.456140350877193) internal successors, (197), 57 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 3429 transitions. [2022-11-25 17:20:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3358 [2022-11-25 17:20:41,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:20:41,663 INFO L195 NwaCegarLoop]: trace histogram [1056, 1055, 1055, 48, 47, 47, 8, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:41,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:41,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:20:41,875 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:20:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash -320132413, now seen corresponding path program 9 times [2022-11-25 17:20:41,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:41,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676944125] [2022-11-25 17:20:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:41,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1723500 backedges. 75 proven. 72062 refuted. 0 times theorem prover too weak. 1651363 trivial. 0 not checked. [2022-11-25 17:21:15,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:15,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676944125] [2022-11-25 17:21:15,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676944125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618209262] [2022-11-25 17:21:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:21:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:15,512 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:21:15,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:21:15,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:15,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:21:15,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1723500 backedges. 0 proven. 647232 refuted. 0 times theorem prover too weak. 1076268 trivial. 0 not checked. [2022-11-25 17:21:39,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1723500 backedges. 0 proven. 647232 refuted. 0 times theorem prover too weak. 1076268 trivial. 0 not checked. [2022-11-25 17:21:54,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618209262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:54,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:54,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2022-11-25 17:21:54,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381868065] [2022-11-25 17:21:54,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:54,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:21:54,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:21:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:21:54,520 INFO L87 Difference]: Start difference. First operand 3362 states and 3429 transitions. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:22:08,991 INFO L93 Difference]: Finished difference Result 15467 states and 16009 transitions. [2022-11-25 17:22:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-25 17:22:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3357 [2022-11-25 17:22:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:22:09,027 INFO L225 Difference]: With dead ends: 15467 [2022-11-25 17:22:09,028 INFO L226 Difference]: Without dead ends: 11835 [2022-11-25 17:22:09,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6864 GetRequests, 6711 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7748 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1870, Invalid=22000, Unknown=0, NotChecked=0, Total=23870 [2022-11-25 17:22:09,039 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 347 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 3613 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 3613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:22:09,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 132 Invalid, 3747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 3613 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 17:22:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2022-11-25 17:22:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 6216. [2022-11-25 17:22:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6216 states, 6215 states have (on average 1.019147224456959) internal successors, (6334), 6215 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 6334 transitions. [2022-11-25 17:22:10,418 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 6334 transitions. Word has length 3357 [2022-11-25 17:22:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:22:10,419 INFO L495 AbstractCegarLoop]: Abstraction has 6216 states and 6334 transitions. [2022-11-25 17:22:10,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 6334 transitions. [2022-11-25 17:22:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6214 [2022-11-25 17:22:10,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:22:10,647 INFO L195 NwaCegarLoop]: trace histogram [1957, 1956, 1956, 84, 83, 83, 14, 13, 13, 13, 12, 12, 5, 4, 4, 1, 1, 1, 1] [2022-11-25 17:22:10,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:10,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:10,848 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:22:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1772466518, now seen corresponding path program 10 times [2022-11-25 17:22:10,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:10,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105289490] [2022-11-25 17:22:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5914396 backedges. 141 proven. 145919 refuted. 0 times theorem prover too weak. 5768336 trivial. 0 not checked. [2022-11-25 17:23:32,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:32,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105289490] [2022-11-25 17:23:32,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105289490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839269366] [2022-11-25 17:23:32,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:23:32,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:32,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:32,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2f732a7-acd7-4944-b0ec-c64400cf7be3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:23:34,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:23:34,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 8549 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:23:34,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5914396 backedges. 2935886 proven. 51572 refuted. 0 times theorem prover too weak. 2926938 trivial. 0 not checked. [2022-11-25 17:23:50,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5914396 backedges. 2398296 proven. 589162 refuted. 0 times theorem prover too weak. 2926938 trivial. 0 not checked. [2022-11-25 17:24:04,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839269366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:04,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:24:04,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 59 [2022-11-25 17:24:04,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874756613] [2022-11-25 17:24:04,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:04,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-25 17:24:04,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:04,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-25 17:24:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=3046, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 17:24:04,634 INFO L87 Difference]: Start difference. First operand 6216 states and 6334 transitions. Second operand has 59 states, 59 states have (on average 4.1525423728813555) internal successors, (245), 59 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)