./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8 --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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- 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-2329fc7 [2022-12-13 13:00:04,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:00:04,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:00:04,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:00:04,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:00:04,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:00:04,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:00:04,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:00:04,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:00:04,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:00:04,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:00:04,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:00:04,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:00:04,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:00:04,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:00:04,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:00:04,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:00:04,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:00:04,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:00:04,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:00:04,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:00:04,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:00:04,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:00:04,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:00:04,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:00:04,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:00:04,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:00:04,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:00:04,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:00:04,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:00:04,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:00:04,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:00:04,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:00:04,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:00:04,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:00:04,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:00:04,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:00:04,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:00:04,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:00:04,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:00:04,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:00:04,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:00:04,308 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:00:04,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:00:04,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:00:04,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:00:04,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:00:04,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:00:04,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:00:04,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:00:04,317 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:00:04,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:00:04,317 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:00:04,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:00:04,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:00:04,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:00:04,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:00:04,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:00:04,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:00:04,318 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:00:04,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:00:04,319 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:00:04,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:00:04,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:00:04,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:00:04,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:00:04,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:00:04,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:00:04,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:00:04,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:00:04,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:00:04,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:00:04,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:00:04,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:00:04,321 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:00:04,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:00:04,321 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:00:04,322 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_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2022-12-13 13:00:04,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:00:04,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:00:04,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:00:04,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:00:04,510 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:00:04,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loops/n.c24.i [2022-12-13 13:00:07,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:00:07,243 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:00:07,243 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/sv-benchmarks/c/loops/n.c24.i [2022-12-13 13:00:07,249 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/data/4c7b90181/3bd0e49ffe514491adeb03a03f6f673d/FLAG9edddbd58 [2022-12-13 13:00:07,259 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/data/4c7b90181/3bd0e49ffe514491adeb03a03f6f673d [2022-12-13 13:00:07,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:00:07,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:00:07,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:00:07,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:00:07,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:00:07,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ebc9a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07, skipping insertion in model container [2022-12-13 13:00:07,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:00:07,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:00:07,406 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_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/sv-benchmarks/c/loops/n.c24.i[805,818] [2022-12-13 13:00:07,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:00:07,457 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:00:07,468 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_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/sv-benchmarks/c/loops/n.c24.i[805,818] [2022-12-13 13:00:07,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:00:07,497 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:00:07,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07 WrapperNode [2022-12-13 13:00:07,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:00:07,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:00:07,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:00:07,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:00:07,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,526 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 154 [2022-12-13 13:00:07,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:00:07,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:00:07,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:00:07,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:00:07,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:00:07,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:00:07,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:00:07,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:00:07,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (1/1) ... [2022-12-13 13:00:07,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:00:07,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:07,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:00:07,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-12-13 13:00:07,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:00:07,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:00:07,662 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:00:07,663 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:00:07,838 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:00:07,843 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:00:07,843 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 13:00:07,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:00:07 BoogieIcfgContainer [2022-12-13 13:00:07,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:00:07,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:00:07,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:00:07,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:00:07,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:00:07" (1/3) ... [2022-12-13 13:00:07,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab61516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:00:07, skipping insertion in model container [2022-12-13 13:00:07,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:00:07" (2/3) ... [2022-12-13 13:00:07,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab61516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:00:07, skipping insertion in model container [2022-12-13 13:00:07,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:00:07" (3/3) ... [2022-12-13 13:00:07,851 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-12-13 13:00:07,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:00:07,864 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:00:07,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:00:07,903 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;@3d1795ae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:00:07,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 13:00:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 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) [2022-12-13 13:00:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 13:00:07,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:07,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:07,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:07,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:07,916 INFO L85 PathProgramCache]: Analyzing trace with hash 214843119, now seen corresponding path program 1 times [2022-12-13 13:00:07,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202860336] [2022-12-13 13:00:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:07,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:00:08,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:08,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202860336] [2022-12-13 13:00:08,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202860336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:00:08,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:00:08,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:00:08,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556694903] [2022-12-13 13:00:08,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:00:08,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:00:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:08,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:00:08,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:00:08,129 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-12-13 13:00:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:00:08,189 INFO L93 Difference]: Finished difference Result 90 states and 141 transitions. [2022-12-13 13:00:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:00:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-12-13 13:00:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:00:08,201 INFO L225 Difference]: With dead ends: 90 [2022-12-13 13:00:08,201 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 13:00:08,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:00:08,208 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:00:08,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:00:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 13:00:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2022-12-13 13:00:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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) [2022-12-13 13:00:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-12-13 13:00:08,243 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2022-12-13 13:00:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:00:08,244 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-12-13 13:00:08,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-12-13 13:00:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-12-13 13:00:08,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 13:00:08,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:08,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:08,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:00:08,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash 979779318, now seen corresponding path program 1 times [2022-12-13 13:00:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:08,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902261083] [2022-12-13 13:00:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:00:08,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:08,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902261083] [2022-12-13 13:00:08,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902261083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:08,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81383049] [2022-12-13 13:00:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:08,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:08,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:08,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:08,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:00:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:00:08,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:00:08,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:00:08,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81383049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:08,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:08,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 13:00:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908965446] [2022-12-13 13:00:08,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:08,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:00:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:00:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:00:08,480 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-12-13 13:00:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:00:08,561 INFO L93 Difference]: Finished difference Result 128 states and 180 transitions. [2022-12-13 13:00:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:00:08,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 [2022-12-13 13:00:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:00:08,563 INFO L225 Difference]: With dead ends: 128 [2022-12-13 13:00:08,563 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 13:00:08,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:00:08,565 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 176 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:00:08,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 116 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:00:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 13:00:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-12-13 13:00:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.38) internal successors, (138), 100 states have internal predecessors, (138), 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) [2022-12-13 13:00:08,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2022-12-13 13:00:08,578 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 15 [2022-12-13 13:00:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:00:08,579 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2022-12-13 13:00:08,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-12-13 13:00:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2022-12-13 13:00:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 13:00:08,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:08,580 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:08,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:00:08,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 13:00:08,782 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash -15587406, now seen corresponding path program 2 times [2022-12-13 13:00:08,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:08,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464076516] [2022-12-13 13:00:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:08,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 13:00:09,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:09,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464076516] [2022-12-13 13:00:09,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464076516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:00:09,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:00:09,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:00:09,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005338477] [2022-12-13 13:00:09,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:00:09,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:00:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:00:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:00:09,052 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-12-13 13:00:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:00:09,083 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2022-12-13 13:00:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:00:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 36 [2022-12-13 13:00:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:00:09,085 INFO L225 Difference]: With dead ends: 187 [2022-12-13 13:00:09,085 INFO L226 Difference]: Without dead ends: 183 [2022-12-13 13:00:09,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:00:09,087 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:00:09,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 111 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:00:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-13 13:00:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 102. [2022-12-13 13:00:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.386138613861386) internal successors, (140), 101 states have internal predecessors, (140), 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) [2022-12-13 13:00:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2022-12-13 13:00:09,101 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 36 [2022-12-13 13:00:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:00:09,101 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2022-12-13 13:00:09,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-12-13 13:00:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2022-12-13 13:00:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 13:00:09,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:09,103 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:09,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:00:09,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:09,104 INFO L85 PathProgramCache]: Analyzing trace with hash -569704896, now seen corresponding path program 1 times [2022-12-13 13:00:09,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:09,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50385973] [2022-12-13 13:00:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:09,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-13 13:00:09,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50385973] [2022-12-13 13:00:09,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50385973] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124744833] [2022-12-13 13:00:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:09,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:09,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:09,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:09,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:00:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:09,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:00:09,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-13 13:00:09,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-13 13:00:09,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124744833] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:09,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:09,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 13:00:09,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684171108] [2022-12-13 13:00:09,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:09,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:00:09,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:09,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:00:09,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:00:09,388 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 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) [2022-12-13 13:00:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:00:09,557 INFO L93 Difference]: Finished difference Result 351 states and 498 transitions. [2022-12-13 13:00:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:00:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 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 41 [2022-12-13 13:00:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:00:09,559 INFO L225 Difference]: With dead ends: 351 [2022-12-13 13:00:09,560 INFO L226 Difference]: Without dead ends: 260 [2022-12-13 13:00:09,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:00:09,561 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 640 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:00:09,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 280 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:00:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-13 13:00:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2022-12-13 13:00:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.389121338912134) internal successors, (332), 239 states have internal predecessors, (332), 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) [2022-12-13 13:00:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 332 transitions. [2022-12-13 13:00:09,577 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 332 transitions. Word has length 41 [2022-12-13 13:00:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:00:09,577 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 332 transitions. [2022-12-13 13:00:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 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) [2022-12-13 13:00:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 332 transitions. [2022-12-13 13:00:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 13:00:09,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:09,579 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:09,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:00:09,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:09,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash 663811572, now seen corresponding path program 2 times [2022-12-13 13:00:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:09,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082068578] [2022-12-13 13:00:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:09,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-12-13 13:00:10,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:10,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082068578] [2022-12-13 13:00:10,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082068578] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:10,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809280315] [2022-12-13 13:00:10,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:00:10,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:10,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:10,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:10,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:00:10,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:00:10,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:00:10,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:00:10,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-12-13 13:00:10,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-12-13 13:00:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809280315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:10,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:10,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 13:00:10,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895942772] [2022-12-13 13:00:10,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:10,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 13:00:10,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 13:00:10,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:00:10,441 INFO L87 Difference]: Start difference. First operand 240 states and 332 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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) [2022-12-13 13:00:10,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:00:10,814 INFO L93 Difference]: Finished difference Result 771 states and 1098 transitions. [2022-12-13 13:00:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:00:10,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 83 [2022-12-13 13:00:10,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:00:10,817 INFO L225 Difference]: With dead ends: 771 [2022-12-13 13:00:10,817 INFO L226 Difference]: Without dead ends: 554 [2022-12-13 13:00:10,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:00:10,819 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2409 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2409 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:00:10,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2409 Valid, 544 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:00:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-12-13 13:00:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 516. [2022-12-13 13:00:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.3902912621359222) internal successors, (716), 515 states have internal predecessors, (716), 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) [2022-12-13 13:00:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 716 transitions. [2022-12-13 13:00:10,856 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 716 transitions. Word has length 83 [2022-12-13 13:00:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:00:10,856 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 716 transitions. [2022-12-13 13:00:10,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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) [2022-12-13 13:00:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 716 transitions. [2022-12-13 13:00:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-13 13:00:10,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:10,862 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:10,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:00:11,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:11,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1319385436, now seen corresponding path program 3 times [2022-12-13 13:00:11,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:11,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851133680] [2022-12-13 13:00:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:11,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-12-13 13:00:11,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:11,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851133680] [2022-12-13 13:00:11,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851133680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829983883] [2022-12-13 13:00:11,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:00:11,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:11,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:11,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:11,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:00:12,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 13:00:12,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:00:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 13:00:12,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-12-13 13:00:12,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-12-13 13:00:12,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829983883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:12,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:12,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2022-12-13 13:00:12,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740342860] [2022-12-13 13:00:12,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:12,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 13:00:12,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 13:00:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 13:00:12,271 INFO L87 Difference]: Start difference. First operand 516 states and 716 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 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) [2022-12-13 13:00:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:00:17,147 INFO L93 Difference]: Finished difference Result 2608 states and 3704 transitions. [2022-12-13 13:00:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-12-13 13:00:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 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 167 [2022-12-13 13:00:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:00:17,152 INFO L225 Difference]: With dead ends: 2608 [2022-12-13 13:00:17,152 INFO L226 Difference]: Without dead ends: 2133 [2022-12-13 13:00:17,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11157 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=8191, Invalid=22609, Unknown=0, NotChecked=0, Total=30800 [2022-12-13 13:00:17,160 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 12861 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12861 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:00:17,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12861 Valid, 701 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:00:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2022-12-13 13:00:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 590. [2022-12-13 13:00:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.4023769100169778) internal successors, (826), 589 states have internal predecessors, (826), 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) [2022-12-13 13:00:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 826 transitions. [2022-12-13 13:00:17,205 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 826 transitions. Word has length 167 [2022-12-13 13:00:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:00:17,205 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 826 transitions. [2022-12-13 13:00:17,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 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) [2022-12-13 13:00:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 826 transitions. [2022-12-13 13:00:17,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-12-13 13:00:17,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:17,207 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:17,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:00:17,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:17,409 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash 914783370, now seen corresponding path program 4 times [2022-12-13 13:00:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:17,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745173672] [2022-12-13 13:00:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:17,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-12-13 13:00:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:18,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745173672] [2022-12-13 13:00:18,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745173672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:18,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781236151] [2022-12-13 13:00:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:00:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:18,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:18,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:00:18,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:00:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:00:18,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:00:18,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-12-13 13:00:18,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-12-13 13:00:18,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781236151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:18,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:18,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-12-13 13:00:18,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585243497] [2022-12-13 13:00:18,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:18,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 13:00:18,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 13:00:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 13:00:18,822 INFO L87 Difference]: Start difference. First operand 590 states and 826 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 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) [2022-12-13 13:00:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:00:20,013 INFO L93 Difference]: Finished difference Result 3058 states and 4504 transitions. [2022-12-13 13:00:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 13:00:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 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 189 [2022-12-13 13:00:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:00:20,020 INFO L225 Difference]: With dead ends: 3058 [2022-12-13 13:00:20,020 INFO L226 Difference]: Without dead ends: 2517 [2022-12-13 13:00:20,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 13:00:20,022 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4584 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4584 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:00:20,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4584 Valid, 1200 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:00:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2022-12-13 13:00:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1165. [2022-12-13 13:00:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 1.3969072164948453) internal successors, (1626), 1164 states have internal predecessors, (1626), 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) [2022-12-13 13:00:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1626 transitions. [2022-12-13 13:00:20,109 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1626 transitions. Word has length 189 [2022-12-13 13:00:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:00:20,109 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 1626 transitions. [2022-12-13 13:00:20,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 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) [2022-12-13 13:00:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1626 transitions. [2022-12-13 13:00:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-12-13 13:00:20,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:20,113 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:20,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:00:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 13:00:20,314 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:20,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:20,314 INFO L85 PathProgramCache]: Analyzing trace with hash 892851466, now seen corresponding path program 5 times [2022-12-13 13:00:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:20,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686835224] [2022-12-13 13:00:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:20,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2022-12-13 13:00:22,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686835224] [2022-12-13 13:00:22,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686835224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577812858] [2022-12-13 13:00:22,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:00:22,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:22,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:22,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:22,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:01:00,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-12-13 13:01:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:01:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 13:01:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:01:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2022-12-13 13:01:00,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:01:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2022-12-13 13:01:02,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577812858] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:01:02,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:01:02,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-12-13 13:01:02,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631266880] [2022-12-13 13:01:02,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:01:02,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-13 13:01:02,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:01:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-13 13:01:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 13:01:02,579 INFO L87 Difference]: Start difference. First operand 1165 states and 1626 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 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) [2022-12-13 13:01:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:01:11,169 INFO L93 Difference]: Finished difference Result 6083 states and 8954 transitions. [2022-12-13 13:01:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-13 13:01:11,170 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 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 364 [2022-12-13 13:01:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:01:11,178 INFO L225 Difference]: With dead ends: 6083 [2022-12-13 13:01:11,178 INFO L226 Difference]: Without dead ends: 5017 [2022-12-13 13:01:11,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 13:01:11,181 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 10065 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10065 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:01:11,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10065 Valid, 2412 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 13:01:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2022-12-13 13:01:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 2315. [2022-12-13 13:01:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 1.3941227312013829) internal successors, (3226), 2314 states have internal predecessors, (3226), 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) [2022-12-13 13:01:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3226 transitions. [2022-12-13 13:01:11,400 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3226 transitions. Word has length 364 [2022-12-13 13:01:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:01:11,400 INFO L495 AbstractCegarLoop]: Abstraction has 2315 states and 3226 transitions. [2022-12-13 13:01:11,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 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) [2022-12-13 13:01:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3226 transitions. [2022-12-13 13:01:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2022-12-13 13:01:11,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:01:11,414 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:01:11,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:01:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:11,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:01:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:01:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1941301934, now seen corresponding path program 6 times [2022-12-13 13:01:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:01:11,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728400551] [2022-12-13 13:01:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:01:11,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:01:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:01:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 24285 trivial. 0 not checked. [2022-12-13 13:01:19,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:01:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728400551] [2022-12-13 13:01:19,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728400551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:01:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276536765] [2022-12-13 13:01:19,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:01:19,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:01:19,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:01:19,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:01:19,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:01:19,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-12-13 13:01:19,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:01:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:01:19,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:01:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 680 proven. 34 refuted. 0 times theorem prover too weak. 33175 trivial. 0 not checked. [2022-12-13 13:01:20,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:01:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 680 proven. 34 refuted. 0 times theorem prover too weak. 33175 trivial. 0 not checked. [2022-12-13 13:01:20,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276536765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:01:20,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:01:20,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 9, 9] total 115 [2022-12-13 13:01:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560917148] [2022-12-13 13:01:20,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:01:20,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-12-13 13:01:20,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:01:20,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-12-13 13:01:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5127, Invalid=7983, Unknown=0, NotChecked=0, Total=13110 [2022-12-13 13:01:20,442 INFO L87 Difference]: Start difference. First operand 2315 states and 3226 transitions. Second operand has 115 states, 115 states have (on average 2.4) internal successors, (276), 115 states have internal predecessors, (276), 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) [2022-12-13 13:11:33,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:11:33,524 INFO L93 Difference]: Finished difference Result 23013 states and 33038 transitions. [2022-12-13 13:11:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2022-12-13 13:11:33,525 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.4) internal successors, (276), 115 states have internal predecessors, (276), 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 714 [2022-12-13 13:11:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:11:33,571 INFO L225 Difference]: With dead ends: 23013 [2022-12-13 13:11:33,571 INFO L226 Difference]: Without dead ends: 20885 [2022-12-13 13:11:33,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3629 GetRequests, 2017 SyntacticMatches, 0 SemanticMatches, 1612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213249 ImplicationChecksByTransitivity, 241.7s TimeCoverageRelationStatistics Valid=622983, Invalid=1980399, Unknown=0, NotChecked=0, Total=2603382 [2022-12-13 13:11:33,818 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 230204 mSDsluCounter, 2374 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 8128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230204 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 9387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 8128 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:11:33,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230204 Valid, 2404 Invalid, 9387 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [8128 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-12-13 13:11:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20885 states. [2022-12-13 13:11:34,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20885 to 2440. [2022-12-13 13:11:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.3997539975399753) internal successors, (3414), 2439 states have internal predecessors, (3414), 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) [2022-12-13 13:11:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3414 transitions. [2022-12-13 13:11:34,182 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3414 transitions. Word has length 714 [2022-12-13 13:11:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:11:34,182 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 3414 transitions. [2022-12-13 13:11:34,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.4) internal successors, (276), 115 states have internal predecessors, (276), 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) [2022-12-13 13:11:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3414 transitions. [2022-12-13 13:11:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2022-12-13 13:11:34,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:11:34,189 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:11:34,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:11:34,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:11:34,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:11:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:11:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1505500494, now seen corresponding path program 7 times [2022-12-13 13:11:34,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:11:34,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901163001] [2022-12-13 13:11:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:11:34,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:11:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2022-12-13 13:11:42,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:11:42,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901163001] [2022-12-13 13:11:42,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901163001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:11:42,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2895941] [2022-12-13 13:11:42,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:11:42,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:11:42,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:11:42,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:11:42,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:11:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:42,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 2918 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-13 13:11:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:11:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2022-12-13 13:11:42,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:11:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2022-12-13 13:11:50,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2895941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:11:50,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:11:50,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2022-12-13 13:11:50,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452712608] [2022-12-13 13:11:50,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:11:50,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-13 13:11:50,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:11:50,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-13 13:11:50,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-12-13 13:11:50,362 INFO L87 Difference]: Start difference. First operand 2440 states and 3414 transitions. Second operand has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 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) [2022-12-13 13:13:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:13:40,746 INFO L93 Difference]: Finished difference Result 22760 states and 34100 transitions. [2022-12-13 13:13:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-13 13:13:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 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 751 [2022-12-13 13:13:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:13:40,773 INFO L225 Difference]: With dead ends: 22760 [2022-12-13 13:13:40,773 INFO L226 Difference]: Without dead ends: 20521 [2022-12-13 13:13:40,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1602 GetRequests, 1401 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-12-13 13:13:40,780 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 24623 mSDsluCounter, 4792 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24623 SdHoareTripleChecker+Valid, 4824 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:13:40,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24623 Valid, 4824 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-13 13:13:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20521 states. [2022-12-13 13:13:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20521 to 4763. [2022-12-13 13:13:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 1.3956320873582528) internal successors, (6646), 4762 states have internal predecessors, (6646), 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) [2022-12-13 13:13:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 6646 transitions. [2022-12-13 13:13:41,537 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 6646 transitions. Word has length 751 [2022-12-13 13:13:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:13:41,537 INFO L495 AbstractCegarLoop]: Abstraction has 4763 states and 6646 transitions. [2022-12-13 13:13:41,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 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) [2022-12-13 13:13:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 6646 transitions. [2022-12-13 13:13:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1459 [2022-12-13 13:13:41,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:13:41,554 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 200, 200, 200, 200, 200, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:13:41,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:13:41,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecf29c71-a71a-47c5-ae3f-f3454259a1d4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 13:13:41,755 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:13:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash -605204102, now seen corresponding path program 8 times [2022-12-13 13:13:41,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:41,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863509771] [2022-12-13 13:13:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:41,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat