./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc6dc2c99e05b6915f0a2e5b5d96221c996d96767aaa6be997dea59c4d6f5f0a --- 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-5e519f3 [2022-11-03 04:10:43,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:10:43,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:10:43,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:10:43,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:10:43,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:10:43,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:10:43,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:10:43,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:10:43,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:10:43,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:10:43,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:10:43,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:10:43,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:10:43,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:10:43,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:10:43,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:10:43,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:10:43,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:10:43,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:10:43,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:10:43,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:10:43,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:10:43,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:10:43,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:10:43,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:10:43,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:10:43,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:10:43,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:10:43,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:10:43,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:10:43,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:10:43,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:10:43,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:10:43,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:10:43,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:10:43,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:10:43,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:10:43,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:10:43,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:10:43,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:10:43,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:10:43,326 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:10:43,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:10:43,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:10:43,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:10:43,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:10:43,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:10:43,329 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:10:43,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:10:43,330 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:10:43,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:10:43,331 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:10:43,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:10:43,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:10:43,332 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:10:43,332 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:10:43,332 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:10:43,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:10:43,333 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:10:43,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:10:43,334 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:10:43,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:10:43,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:10:43,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:10:43,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:10:43,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:10:43,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:10:43,336 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:10:43,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:10:43,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:10:43,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:10:43,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:10:43,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:10:43,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:43,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:10:43,338 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:10:43,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:10:43,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:10:43,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:10:43,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:10:43,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:10:43,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:10:43,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc6dc2c99e05b6915f0a2e5b5d96221c996d96767aaa6be997dea59c4d6f5f0a [2022-11-03 04:10:43,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:10:43,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:10:43,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:10:43,659 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:10:43,660 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:10:43,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2022-11-03 04:10:43,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/data/7f1367285/21d51695e5084e8482146b7d65ef6421/FLAGc884861dc [2022-11-03 04:10:44,359 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:10:44,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/sv-benchmarks/c/systemc/token_ring.12.cil-2.c [2022-11-03 04:10:44,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/data/7f1367285/21d51695e5084e8482146b7d65ef6421/FLAGc884861dc [2022-11-03 04:10:44,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/data/7f1367285/21d51695e5084e8482146b7d65ef6421 [2022-11-03 04:10:44,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:10:44,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:10:44,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:44,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:10:44,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:10:44,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:44" (1/1) ... [2022-11-03 04:10:44,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48971299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:44, skipping insertion in model container [2022-11-03 04:10:44,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:44" (1/1) ... [2022-11-03 04:10:44,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:10:44,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:10:44,948 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/sv-benchmarks/c/systemc/token_ring.12.cil-2.c[671,684] [2022-11-03 04:10:45,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:45,116 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:10:45,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/sv-benchmarks/c/systemc/token_ring.12.cil-2.c[671,684] [2022-11-03 04:10:45,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:10:45,239 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:10:45,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45 WrapperNode [2022-11-03 04:10:45,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:10:45,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:45,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:10:45,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:10:45,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,334 INFO L138 Inliner]: procedures = 52, calls = 67, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 853 [2022-11-03 04:10:45,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:10:45,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:10:45,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:10:45,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:10:45,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,426 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:10:45,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:10:45,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:10:45,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:10:45,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (1/1) ... [2022-11-03 04:10:45,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:10:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:45,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:10:45,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:10:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:10:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 04:10:45,564 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 04:10:45,564 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 04:10:45,564 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 04:10:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 04:10:45,565 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 04:10:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 04:10:45,565 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 04:10:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 04:10:45,566 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 04:10:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 04:10:45,566 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 04:10:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:10:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:10:45,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:10:45,742 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:10:45,744 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:10:46,937 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:10:47,528 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:10:47,528 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-03 04:10:47,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:47 BoogieIcfgContainer [2022-11-03 04:10:47,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:10:47,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:10:47,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:10:47,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:10:47,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:10:44" (1/3) ... [2022-11-03 04:10:47,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5c3a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:47, skipping insertion in model container [2022-11-03 04:10:47,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:45" (2/3) ... [2022-11-03 04:10:47,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5c3a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:47, skipping insertion in model container [2022-11-03 04:10:47,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:47" (3/3) ... [2022-11-03 04:10:47,544 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-2.c [2022-11-03 04:10:47,566 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:10:47,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:10:47,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:10:47,654 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=FINITE_AUTOMATA, 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;@6c5fc2f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:10:47,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:10:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 188 states, 154 states have (on average 1.5584415584415585) internal successors, (240), 156 states have internal predecessors, (240), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-03 04:10:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 04:10:47,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:47,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:47,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1262094952, now seen corresponding path program 1 times [2022-11-03 04:10:47,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:47,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690618588] [2022-11-03 04:10:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:47,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:48,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:48,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690618588] [2022-11-03 04:10:48,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690618588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:48,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:48,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:48,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550128813] [2022-11-03 04:10:48,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:48,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:10:48,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:48,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:10:48,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:48,421 INFO L87 Difference]: Start difference. First operand has 188 states, 154 states have (on average 1.5584415584415585) internal successors, (240), 156 states have internal predecessors, (240), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 04:10:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:49,029 INFO L93 Difference]: Finished difference Result 548 states and 868 transitions. [2022-11-03 04:10:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:10:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-11-03 04:10:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:49,053 INFO L225 Difference]: With dead ends: 548 [2022-11-03 04:10:49,054 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 04:10:49,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:49,068 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 512 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:49,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 810 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:10:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 04:10:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 360. [2022-11-03 04:10:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 299 states have (on average 1.5250836120401339) internal successors, (456), 301 states have internal predecessors, (456), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-03 04:10:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 552 transitions. [2022-11-03 04:10:49,221 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 552 transitions. Word has length 66 [2022-11-03 04:10:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:49,222 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 552 transitions. [2022-11-03 04:10:49,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 04:10:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 552 transitions. [2022-11-03 04:10:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 04:10:49,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:49,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:49,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:10:49,241 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:49,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1731208306, now seen corresponding path program 1 times [2022-11-03 04:10:49,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:49,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886556057] [2022-11-03 04:10:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:49,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:10:49,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:49,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886556057] [2022-11-03 04:10:49,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886556057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:10:49,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056440941] [2022-11-03 04:10:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:49,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:49,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:49,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:49,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:10:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:10:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:10:50,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:50,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056440941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:50,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:10:50,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:10:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665493208] [2022-11-03 04:10:50,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:50,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:10:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:10:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:50,221 INFO L87 Difference]: Start difference. First operand 360 states and 552 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:50,454 INFO L93 Difference]: Finished difference Result 1063 states and 1659 transitions. [2022-11-03 04:10:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:10:50,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-11-03 04:10:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:50,461 INFO L225 Difference]: With dead ends: 1063 [2022-11-03 04:10:50,462 INFO L226 Difference]: Without dead ends: 708 [2022-11-03 04:10:50,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:50,465 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 232 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:50,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 514 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-11-03 04:10:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 704. [2022-11-03 04:10:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 589 states have (on average 1.5229202037351444) internal successors, (897), 592 states have internal predecessors, (897), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 04:10:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1077 transitions. [2022-11-03 04:10:50,516 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1077 transitions. Word has length 135 [2022-11-03 04:10:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:50,517 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 1077 transitions. [2022-11-03 04:10:50,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1077 transitions. [2022-11-03 04:10:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 04:10:50,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:50,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:50,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:50,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:50,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:50,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2096052334, now seen corresponding path program 1 times [2022-11-03 04:10:50,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:50,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2985151] [2022-11-03 04:10:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:50,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:10:50,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:50,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2985151] [2022-11-03 04:10:50,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2985151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:10:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202477527] [2022-11-03 04:10:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:50,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:50,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:50,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:50,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:10:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:51,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:10:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 04:10:51,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:51,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202477527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:51,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:10:51,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:10:51,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303914878] [2022-11-03 04:10:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:10:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:10:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:51,352 INFO L87 Difference]: Start difference. First operand 704 states and 1077 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:51,590 INFO L93 Difference]: Finished difference Result 2089 states and 3252 transitions. [2022-11-03 04:10:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:10:51,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-11-03 04:10:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:51,603 INFO L225 Difference]: With dead ends: 2089 [2022-11-03 04:10:51,604 INFO L226 Difference]: Without dead ends: 1390 [2022-11-03 04:10:51,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:51,610 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 241 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:51,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 502 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-11-03 04:10:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1384. [2022-11-03 04:10:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1163 states have (on average 1.5193465176268273) internal successors, (1767), 1168 states have internal predecessors, (1767), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-03 04:10:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2111 transitions. [2022-11-03 04:10:51,727 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2111 transitions. Word has length 135 [2022-11-03 04:10:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:51,729 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 2111 transitions. [2022-11-03 04:10:51,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2111 transitions. [2022-11-03 04:10:51,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 04:10:51,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:51,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:51,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 04:10:51,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:51,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash -258320498, now seen corresponding path program 1 times [2022-11-03 04:10:51,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:51,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679775840] [2022-11-03 04:10:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:51,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:10:52,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679775840] [2022-11-03 04:10:52,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679775840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:10:52,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672760088] [2022-11-03 04:10:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:52,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:52,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:52,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:10:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:52,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:10:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 04:10:52,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:52,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672760088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:52,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:10:52,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:10:52,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792199661] [2022-11-03 04:10:52,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:52,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:10:52,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:52,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:10:52,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:52,556 INFO L87 Difference]: Start difference. First operand 1384 states and 2111 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:52,831 INFO L93 Difference]: Finished difference Result 4117 states and 6388 transitions. [2022-11-03 04:10:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:10:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-11-03 04:10:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:52,847 INFO L225 Difference]: With dead ends: 4117 [2022-11-03 04:10:52,847 INFO L226 Difference]: Without dead ends: 2738 [2022-11-03 04:10:52,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:52,854 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 259 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:52,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 501 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2022-11-03 04:10:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2728. [2022-11-03 04:10:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2299 states have (on average 1.5150065245759026) internal successors, (3483), 2308 states have internal predecessors, (3483), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-11-03 04:10:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 4147 transitions. [2022-11-03 04:10:53,072 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 4147 transitions. Word has length 135 [2022-11-03 04:10:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:53,074 INFO L495 AbstractCegarLoop]: Abstraction has 2728 states and 4147 transitions. [2022-11-03 04:10:53,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 4147 transitions. [2022-11-03 04:10:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 04:10:53,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:53,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:53,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:53,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:53,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1185410734, now seen corresponding path program 1 times [2022-11-03 04:10:53,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:53,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131062016] [2022-11-03 04:10:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:53,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:10:53,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131062016] [2022-11-03 04:10:53,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131062016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:10:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950184642] [2022-11-03 04:10:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:53,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:53,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:53,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:10:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:10:53,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 04:10:53,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:53,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950184642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:53,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:10:53,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:10:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474370064] [2022-11-03 04:10:53,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:10:53,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:53,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:10:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:53,843 INFO L87 Difference]: Start difference. First operand 2728 states and 4147 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:54,222 INFO L93 Difference]: Finished difference Result 8125 states and 12560 transitions. [2022-11-03 04:10:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:10:54,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-11-03 04:10:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:54,254 INFO L225 Difference]: With dead ends: 8125 [2022-11-03 04:10:54,255 INFO L226 Difference]: Without dead ends: 5402 [2022-11-03 04:10:54,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:54,270 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 262 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:54,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 511 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:10:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2022-11-03 04:10:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 5384. [2022-11-03 04:10:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5384 states, 4547 states have (on average 1.510226522982186) internal successors, (6867), 4564 states have internal predecessors, (6867), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-11-03 04:10:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5384 states to 5384 states and 8155 transitions. [2022-11-03 04:10:54,624 INFO L78 Accepts]: Start accepts. Automaton has 5384 states and 8155 transitions. Word has length 135 [2022-11-03 04:10:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:54,625 INFO L495 AbstractCegarLoop]: Abstraction has 5384 states and 8155 transitions. [2022-11-03 04:10:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5384 states and 8155 transitions. [2022-11-03 04:10:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 04:10:54,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:54,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:54,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:54,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:54,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1580041102, now seen corresponding path program 1 times [2022-11-03 04:10:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:54,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772209092] [2022-11-03 04:10:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 04:10:55,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:55,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772209092] [2022-11-03 04:10:55,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772209092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:10:55,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655588901] [2022-11-03 04:10:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:55,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:55,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:55,037 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:55,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:10:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:10:55,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:10:55,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:55,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655588901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:55,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:10:55,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 04:10:55,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512022795] [2022-11-03 04:10:55,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:55,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:10:55,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:55,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:10:55,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:55,375 INFO L87 Difference]: Start difference. First operand 5384 states and 8155 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:55,992 INFO L93 Difference]: Finished difference Result 16045 states and 24704 transitions. [2022-11-03 04:10:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:10:55,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-11-03 04:10:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:56,051 INFO L225 Difference]: With dead ends: 16045 [2022-11-03 04:10:56,052 INFO L226 Difference]: Without dead ends: 10666 [2022-11-03 04:10:56,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:56,076 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 247 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:56,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 482 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10666 states. [2022-11-03 04:10:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10666 to 10632. [2022-11-03 04:10:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10632 states, 8995 states have (on average 1.5051695386325736) internal successors, (13539), 9028 states have internal predecessors, (13539), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-11-03 04:10:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10632 states to 10632 states and 16043 transitions. [2022-11-03 04:10:56,721 INFO L78 Accepts]: Start accepts. Automaton has 10632 states and 16043 transitions. Word has length 135 [2022-11-03 04:10:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:56,723 INFO L495 AbstractCegarLoop]: Abstraction has 10632 states and 16043 transitions. [2022-11-03 04:10:56,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 10632 states and 16043 transitions. [2022-11-03 04:10:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 04:10:56,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:56,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:56,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:57,000 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1551054162, now seen corresponding path program 1 times [2022-11-03 04:10:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:57,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876134806] [2022-11-03 04:10:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 04:10:57,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:57,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876134806] [2022-11-03 04:10:57,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876134806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:10:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681688334] [2022-11-03 04:10:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:57,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:57,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:57,210 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:57,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:10:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:10:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:10:57,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:57,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681688334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:57,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:10:57,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-03 04:10:57,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182044182] [2022-11-03 04:10:57,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:57,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:10:57,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:10:57,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:57,539 INFO L87 Difference]: Start difference. First operand 10632 states and 16043 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:10:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:58,707 INFO L93 Difference]: Finished difference Result 31693 states and 48592 transitions. [2022-11-03 04:10:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:10:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-11-03 04:10:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:58,834 INFO L225 Difference]: With dead ends: 31693 [2022-11-03 04:10:58,834 INFO L226 Difference]: Without dead ends: 21066 [2022-11-03 04:10:58,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:10:58,887 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 253 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:58,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 482 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21066 states. [2022-11-03 04:11:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21066 to 21000. [2022-11-03 04:11:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21000 states, 17795 states have (on average 1.499915706659174) internal successors, (26691), 17860 states have internal predecessors, (26691), 2436 states have call successors, (2436), 768 states have call predecessors, (2436), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-11-03 04:11:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21000 states to 21000 states and 31563 transitions. [2022-11-03 04:11:00,326 INFO L78 Accepts]: Start accepts. Automaton has 21000 states and 31563 transitions. Word has length 135 [2022-11-03 04:11:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:00,327 INFO L495 AbstractCegarLoop]: Abstraction has 21000 states and 31563 transitions. [2022-11-03 04:11:00,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:11:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 21000 states and 31563 transitions. [2022-11-03 04:11:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 04:11:00,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:00,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:00,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:00,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:00,594 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:00,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1662895666, now seen corresponding path program 1 times [2022-11-03 04:11:00,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:00,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879993434] [2022-11-03 04:11:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:00,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 04:11:00,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879993434] [2022-11-03 04:11:00,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879993434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:11:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692530062] [2022-11-03 04:11:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:00,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:00,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:00,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:11:00,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 04:11:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:11:01,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:11:01,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:01,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692530062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:01,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:11:01,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-03 04:11:01,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437137022] [2022-11-03 04:11:01,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:01,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:11:01,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:01,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:11:01,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:01,196 INFO L87 Difference]: Start difference. First operand 21000 states and 31563 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:11:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:03,166 INFO L93 Difference]: Finished difference Result 62605 states and 95568 transitions. [2022-11-03 04:11:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:11:03,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-11-03 04:11:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:03,464 INFO L225 Difference]: With dead ends: 62605 [2022-11-03 04:11:03,464 INFO L226 Difference]: Without dead ends: 41610 [2022-11-03 04:11:03,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:03,528 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 235 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:03,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 482 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:11:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41610 states. [2022-11-03 04:11:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41610 to 41480. [2022-11-03 04:11:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41480 states, 35203 states have (on average 1.4945033093770417) internal successors, (52611), 35332 states have internal predecessors, (52611), 4740 states have call successors, (4740), 1536 states have call predecessors, (4740), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-11-03 04:11:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41480 states to 41480 states and 62091 transitions. [2022-11-03 04:11:06,131 INFO L78 Accepts]: Start accepts. Automaton has 41480 states and 62091 transitions. Word has length 135 [2022-11-03 04:11:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:06,132 INFO L495 AbstractCegarLoop]: Abstraction has 41480 states and 62091 transitions. [2022-11-03 04:11:06,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:11:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 41480 states and 62091 transitions. [2022-11-03 04:11:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 04:11:06,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:06,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:06,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:06,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba270073-5baf-4bf7-a8be-fbae8de50bb3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 04:11:06,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:06,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2056990958, now seen corresponding path program 1 times [2022-11-03 04:11:06,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:06,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344958734] [2022-11-03 04:11:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:06,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 04:11:07,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:07,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344958734] [2022-11-03 04:11:07,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344958734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:07,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:07,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:07,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862710534] [2022-11-03 04:11:07,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:07,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:07,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:07,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:07,208 INFO L87 Difference]: Start difference. First operand 41480 states and 62091 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:11:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:11,039 INFO L93 Difference]: Finished difference Result 113420 states and 169933 transitions. [2022-11-03 04:11:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:11:11,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 135 [2022-11-03 04:11:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:11,664 INFO L225 Difference]: With dead ends: 113420 [2022-11-03 04:11:11,664 INFO L226 Difference]: Without dead ends: 71946 [2022-11-03 04:11:11,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:11,760 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 968 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:11,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 816 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:11:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71946 states. [2022-11-03 04:11:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71946 to 61704. [2022-11-03 04:11:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61704 states, 52355 states have (on average 1.4901919587431955) internal successors, (78019), 52548 states have internal predecessors, (78019), 7044 states have call successors, (7044), 2304 states have call predecessors, (7044), 2304 states have return successors, (7044), 6852 states have call predecessors, (7044), 7044 states have call successors, (7044) [2022-11-03 04:11:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61704 states to 61704 states and 92107 transitions. [2022-11-03 04:11:16,077 INFO L78 Accepts]: Start accepts. Automaton has 61704 states and 92107 transitions. Word has length 135 [2022-11-03 04:11:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:16,079 INFO L495 AbstractCegarLoop]: Abstraction has 61704 states and 92107 transitions. [2022-11-03 04:11:16,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:11:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 61704 states and 92107 transitions. [2022-11-03 04:11:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 04:11:16,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:16,180 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:16,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:11:16,181 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:16,182 INFO L85 PathProgramCache]: Analyzing trace with hash 487886790, now seen corresponding path program 1 times [2022-11-03 04:11:16,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:16,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612481252] [2022-11-03 04:11:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 04:11:17,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612481252] [2022-11-03 04:11:17,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612481252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:17,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:17,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:17,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442622675] [2022-11-03 04:11:17,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:17,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:17,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:17,178 INFO L87 Difference]: Start difference. First operand 61704 states and 92107 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:11:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:24,632 INFO L93 Difference]: Finished difference Result 216332 states and 322510 transitions. [2022-11-03 04:11:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:11:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2022-11-03 04:11:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:25,488 INFO L225 Difference]: With dead ends: 216332 [2022-11-03 04:11:25,489 INFO L226 Difference]: Without dead ends: 154634 [2022-11-03 04:11:25,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:11:25,670 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1130 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:25,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 717 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:11:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154634 states. [2022-11-03 04:11:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154634 to 121096. [2022-11-03 04:11:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121096 states, 102787 states have (on average 1.4844192358955899) internal successors, (152579), 103172 states have internal predecessors, (152579), 13700 states have call successors, (13700), 4608 states have call predecessors, (13700), 4608 states have return successors, (13700), 13316 states have call predecessors, (13700), 13700 states have call successors, (13700) [2022-11-03 04:11:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121096 states to 121096 states and 179979 transitions. [2022-11-03 04:11:33,438 INFO L78 Accepts]: Start accepts. Automaton has 121096 states and 179979 transitions. Word has length 136 [2022-11-03 04:11:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:33,439 INFO L495 AbstractCegarLoop]: Abstraction has 121096 states and 179979 transitions. [2022-11-03 04:11:33,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:11:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 121096 states and 179979 transitions. [2022-11-03 04:11:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 04:11:33,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:33,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:11:33,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:33,671 INFO L85 PathProgramCache]: Analyzing trace with hash -633911574, now seen corresponding path program 1 times [2022-11-03 04:11:33,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:33,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185647993] [2022-11-03 04:11:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 04:11:34,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:11:34,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185647993] [2022-11-03 04:11:34,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185647993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:34,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:34,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:11:34,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817208868] [2022-11-03 04:11:34,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:34,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:11:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:34,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:11:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:11:34,372 INFO L87 Difference]: Start difference. First operand 121096 states and 179979 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)