./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW --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 64bit --witnessprinter.graph.data.programhash 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- 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-4e7fbc6 [2022-11-23 15:53:55,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:53:55,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:53:55,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:53:55,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:53:55,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:53:55,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:53:55,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:53:55,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:53:55,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:53:55,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:53:55,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:53:55,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:53:55,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:53:55,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:53:55,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:53:55,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:53:55,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:53:55,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:53:55,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:53:55,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:53:55,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:53:55,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:53:55,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:53:55,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:53:55,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:53:55,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:53:55,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:53:55,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:53:55,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:53:55,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:53:55,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:53:55,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:53:55,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:53:55,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:53:55,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:53:55,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:53:55,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:53:55,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:53:55,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:53:55,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:53:55,348 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:53:55,392 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:53:55,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:53:55,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:53:55,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:53:55,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:53:55,394 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:53:55,394 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:53:55,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:53:55,395 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:53:55,395 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:53:55,396 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:53:55,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:53:55,396 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:53:55,397 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:53:55,397 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:53:55,397 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:53:55,397 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:53:55,397 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:53:55,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:53:55,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:53:55,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:53:55,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:53:55,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:53:55,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:53:55,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:53:55,399 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:53:55,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:53:55,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:53:55,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:53:55,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:53:55,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:53:55,401 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:53:55,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:53:55,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:53:55,401 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:53:55,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:53:55,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:53:55,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:53:55,402 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_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2022-11-23 15:53:55,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:53:55,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:53:55,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:53:55,691 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:53:55,692 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:53:55,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-23 15:53:58,662 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:53:59,252 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:53:59,253 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-23 15:53:59,297 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/data/c36c78a51/0e0d719c78b9425c8df0070975715625/FLAGf2f459da6 [2022-11-23 15:53:59,323 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/data/c36c78a51/0e0d719c78b9425c8df0070975715625 [2022-11-23 15:53:59,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:53:59,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:53:59,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:53:59,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:53:59,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:53:59,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:53:59" (1/1) ... [2022-11-23 15:53:59,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3760c5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:59, skipping insertion in model container [2022-11-23 15:53:59,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:53:59" (1/1) ... [2022-11-23 15:53:59,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:53:59,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:54:00,442 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-23 15:54:01,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:54:01,039 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:54:01,208 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-23 15:54:01,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:54:01,349 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:54:01,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01 WrapperNode [2022-11-23 15:54:01,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:54:01,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:54:01,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:54:01,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:54:01,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,588 INFO L138 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2009 [2022-11-23 15:54:01,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:54:01,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:54:01,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:54:01,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:54:01,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,772 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:54:01,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:54:01,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:54:01,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:54:01,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (1/1) ... [2022-11-23 15:54:01,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:54:01,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:01,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:54:01,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:54:01,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2022-11-23 15:54:01,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2022-11-23 15:54:01,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:54:01,894 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-23 15:54:01,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:54:01,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:54:01,894 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:54:01,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:54:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:54:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 15:54:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 15:54:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:54:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:54:01,896 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-23 15:54:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-23 15:54:01,896 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:54:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:54:01,896 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 15:54:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 15:54:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2022-11-23 15:54:01,897 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2022-11-23 15:54:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-23 15:54:01,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-23 15:54:01,898 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:54:01,898 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:54:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2022-11-23 15:54:01,899 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2022-11-23 15:54:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:54:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2022-11-23 15:54:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2022-11-23 15:54:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 15:54:01,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 15:54:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:54:01,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:54:01,902 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-23 15:54:01,902 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-23 15:54:01,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:54:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:54:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 15:54:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 15:54:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:54:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-23 15:54:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-23 15:54:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2022-11-23 15:54:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2022-11-23 15:54:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:54:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2022-11-23 15:54:01,905 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2022-11-23 15:54:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2022-11-23 15:54:01,906 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2022-11-23 15:54:01,906 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-23 15:54:01,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-23 15:54:01,907 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2022-11-23 15:54:01,907 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2022-11-23 15:54:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2022-11-23 15:54:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2022-11-23 15:54:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:54:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:54:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-23 15:54:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-23 15:54:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2022-11-23 15:54:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2022-11-23 15:54:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-23 15:54:01,910 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-23 15:54:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:54:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-23 15:54:01,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-23 15:54:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2022-11-23 15:54:01,910 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2022-11-23 15:54:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 15:54:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-23 15:54:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:54:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-23 15:54:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-23 15:54:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:54:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-23 15:54:01,913 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-23 15:54:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2022-11-23 15:54:01,913 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2022-11-23 15:54:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 15:54:01,913 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 15:54:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 15:54:01,914 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 15:54:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 15:54:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 15:54:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 15:54:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 15:54:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 15:54:01,916 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 15:54:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 15:54:01,916 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 15:54:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:54:01,917 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-23 15:54:01,917 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-23 15:54:01,917 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-11-23 15:54:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-11-23 15:54:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:54:01,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-23 15:54:01,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-23 15:54:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:54:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:54:01,919 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-23 15:54:01,919 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-23 15:54:02,505 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:54:02,508 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:54:02,850 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:54:04,270 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:54:04,640 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:54:04,640 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 15:54:04,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:04 BoogieIcfgContainer [2022-11-23 15:54:04,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:54:04,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:54:04,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:54:04,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:54:04,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:53:59" (1/3) ... [2022-11-23 15:54:04,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a98296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:04, skipping insertion in model container [2022-11-23 15:54:04,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:01" (2/3) ... [2022-11-23 15:54:04,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a98296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:04, skipping insertion in model container [2022-11-23 15:54:04,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:04" (3/3) ... [2022-11-23 15:54:04,653 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-23 15:54:04,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:54:04,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:54:04,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:54:04,743 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;@467059b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:54:04,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:54:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 555 states, 359 states have (on average 1.392757660167131) internal successors, (500), 375 states have internal predecessors, (500), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-23 15:54:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 15:54:04,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:04,781 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-23 15:54:04,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash -581364251, now seen corresponding path program 1 times [2022-11-23 15:54:04,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090201398] [2022-11-23 15:54:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:04,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:54:05,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:05,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090201398] [2022-11-23 15:54:05,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090201398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:05,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:05,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:54:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671956815] [2022-11-23 15:54:05,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:05,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:54:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:05,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:54:05,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:05,474 INFO L87 Difference]: Start difference. First operand has 555 states, 359 states have (on average 1.392757660167131) internal successors, (500), 375 states have internal predecessors, (500), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 15:54:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:06,271 INFO L93 Difference]: Finished difference Result 1610 states and 2376 transitions. [2022-11-23 15:54:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:54:06,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-23 15:54:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:06,296 INFO L225 Difference]: With dead ends: 1610 [2022-11-23 15:54:06,297 INFO L226 Difference]: Without dead ends: 1052 [2022-11-23 15:54:06,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:06,308 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 733 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:06,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 1510 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:54:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-23 15:54:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2022-11-23 15:54:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 690 states have (on average 1.3695652173913044) internal successors, (945), 708 states have internal predecessors, (945), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-11-23 15:54:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1502 transitions. [2022-11-23 15:54:06,470 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1502 transitions. Word has length 46 [2022-11-23 15:54:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:06,471 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 1502 transitions. [2022-11-23 15:54:06,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 15:54:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1502 transitions. [2022-11-23 15:54:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 15:54:06,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:06,478 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-23 15:54:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:54:06,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1240527917, now seen corresponding path program 1 times [2022-11-23 15:54:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:06,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503592120] [2022-11-23 15:54:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:06,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:06,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152295818] [2022-11-23 15:54:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:06,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:06,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:06,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:54:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:07,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:54:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:54:07,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:07,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:07,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503592120] [2022-11-23 15:54:07,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152295818] [2022-11-23 15:54:07,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152295818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:07,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:07,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:54:07,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960335715] [2022-11-23 15:54:07,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:54:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:54:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:54:07,076 INFO L87 Difference]: Start difference. First operand 1052 states and 1502 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 15:54:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:07,743 INFO L93 Difference]: Finished difference Result 2093 states and 3044 transitions. [2022-11-23 15:54:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:54:07,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-11-23 15:54:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:07,756 INFO L225 Difference]: With dead ends: 2093 [2022-11-23 15:54:07,757 INFO L226 Difference]: Without dead ends: 2075 [2022-11-23 15:54:07,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:54:07,760 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 763 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:07,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 2385 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:54:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-11-23 15:54:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2067. [2022-11-23 15:54:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1355 states have (on average 1.3712177121771219) internal successors, (1858), 1391 states have internal predecessors, (1858), 547 states have call successors, (547), 165 states have call predecessors, (547), 164 states have return successors, (602), 538 states have call predecessors, (602), 546 states have call successors, (602) [2022-11-23 15:54:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3007 transitions. [2022-11-23 15:54:07,886 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3007 transitions. Word has length 46 [2022-11-23 15:54:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:07,887 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 3007 transitions. [2022-11-23 15:54:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 15:54:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3007 transitions. [2022-11-23 15:54:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 15:54:07,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:07,895 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:07,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:54:08,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 15:54:08,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:08,104 INFO L85 PathProgramCache]: Analyzing trace with hash -350464264, now seen corresponding path program 1 times [2022-11-23 15:54:08,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416273331] [2022-11-23 15:54:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:08,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:08,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416273331] [2022-11-23 15:54:08,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 15:54:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674102046] [2022-11-23 15:54:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:08,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:08,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:08,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:08,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:54:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:08,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:54:08,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:54:08,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:08,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674102046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:08,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:08,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:54:08,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272764411] [2022-11-23 15:54:08,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:08,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:54:08,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:08,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:54:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:08,721 INFO L87 Difference]: Start difference. First operand 2067 states and 3007 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:54:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:09,351 INFO L93 Difference]: Finished difference Result 5833 states and 8456 transitions. [2022-11-23 15:54:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:54:09,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-11-23 15:54:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:09,403 INFO L225 Difference]: With dead ends: 5833 [2022-11-23 15:54:09,405 INFO L226 Difference]: Without dead ends: 3777 [2022-11-23 15:54:09,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:09,415 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 627 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:09,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1418 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:54:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2022-11-23 15:54:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3771. [2022-11-23 15:54:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 2512 states have (on average 1.3730095541401275) internal successors, (3449), 2573 states have internal predecessors, (3449), 946 states have call successors, (946), 313 states have call predecessors, (946), 312 states have return successors, (1021), 932 states have call predecessors, (1021), 945 states have call successors, (1021) [2022-11-23 15:54:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 5416 transitions. [2022-11-23 15:54:09,704 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 5416 transitions. Word has length 77 [2022-11-23 15:54:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:09,708 INFO L495 AbstractCegarLoop]: Abstraction has 3771 states and 5416 transitions. [2022-11-23 15:54:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:54:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 5416 transitions. [2022-11-23 15:54:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 15:54:09,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:09,715 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2022-11-23 15:54:09,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:54:09,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 15:54:09,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1795402869, now seen corresponding path program 1 times [2022-11-23 15:54:09,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:09,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759586667] [2022-11-23 15:54:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:09,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:10,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:10,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759586667] [2022-11-23 15:54:10,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 15:54:10,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665836954] [2022-11-23 15:54:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:10,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:10,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:10,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:10,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:54:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:54:10,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:54:10,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:10,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665836954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:10,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:10,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:54:10,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254718791] [2022-11-23 15:54:10,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:10,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:54:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:54:10,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:10,487 INFO L87 Difference]: Start difference. First operand 3771 states and 5416 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 15:54:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:11,433 INFO L93 Difference]: Finished difference Result 10415 states and 14928 transitions. [2022-11-23 15:54:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:54:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 86 [2022-11-23 15:54:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:11,482 INFO L225 Difference]: With dead ends: 10415 [2022-11-23 15:54:11,482 INFO L226 Difference]: Without dead ends: 6655 [2022-11-23 15:54:11,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:11,502 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 612 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:11,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1428 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:54:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2022-11-23 15:54:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 6639. [2022-11-23 15:54:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 4516 states have (on average 1.3768821966341895) internal successors, (6218), 4629 states have internal predecessors, (6218), 1548 states have call successors, (1548), 575 states have call predecessors, (1548), 574 states have return successors, (1683), 1510 states have call predecessors, (1683), 1547 states have call successors, (1683) [2022-11-23 15:54:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 9449 transitions. [2022-11-23 15:54:11,911 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 9449 transitions. Word has length 86 [2022-11-23 15:54:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:11,912 INFO L495 AbstractCegarLoop]: Abstraction has 6639 states and 9449 transitions. [2022-11-23 15:54:11,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 15:54:11,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 9449 transitions. [2022-11-23 15:54:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:54:11,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:11,921 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 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] [2022-11-23 15:54:11,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:54:12,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:12,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:12,130 INFO L85 PathProgramCache]: Analyzing trace with hash 565474349, now seen corresponding path program 1 times [2022-11-23 15:54:12,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:12,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930870566] [2022-11-23 15:54:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:12,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:12,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930870566] [2022-11-23 15:54:12,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 15:54:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413257939] [2022-11-23 15:54:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:12,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:12,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:12,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:54:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:54:12,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 15:54:12,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:12,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413257939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:12,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:12,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:54:12,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023855722] [2022-11-23 15:54:12,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:54:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:54:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:12,816 INFO L87 Difference]: Start difference. First operand 6639 states and 9449 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:54:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:13,665 INFO L93 Difference]: Finished difference Result 17063 states and 24236 transitions. [2022-11-23 15:54:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:54:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-11-23 15:54:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:13,731 INFO L225 Difference]: With dead ends: 17063 [2022-11-23 15:54:13,732 INFO L226 Difference]: Without dead ends: 10435 [2022-11-23 15:54:13,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:13,762 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 538 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:13,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1577 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:54:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2022-11-23 15:54:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10422. [2022-11-23 15:54:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10422 states, 7157 states have (on average 1.3667737878999582) internal successors, (9782), 7331 states have internal predecessors, (9782), 2322 states have call successors, (2322), 943 states have call predecessors, (2322), 942 states have return successors, (2559), 2267 states have call predecessors, (2559), 2321 states have call successors, (2559) [2022-11-23 15:54:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10422 states to 10422 states and 14663 transitions. [2022-11-23 15:54:14,438 INFO L78 Accepts]: Start accepts. Automaton has 10422 states and 14663 transitions. Word has length 101 [2022-11-23 15:54:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:14,439 INFO L495 AbstractCegarLoop]: Abstraction has 10422 states and 14663 transitions. [2022-11-23 15:54:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:54:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 10422 states and 14663 transitions. [2022-11-23 15:54:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 15:54:14,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:14,452 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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, 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] [2022-11-23 15:54:14,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:54:14,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:14,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1891144612, now seen corresponding path program 1 times [2022-11-23 15:54:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:14,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469981334] [2022-11-23 15:54:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:14,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:14,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:14,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369006581] [2022-11-23 15:54:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:14,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:14,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:14,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:54:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:15,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:54:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-23 15:54:15,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:15,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:15,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469981334] [2022-11-23 15:54:15,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:15,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369006581] [2022-11-23 15:54:15,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369006581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:15,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:15,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:54:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617326833] [2022-11-23 15:54:15,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:54:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:54:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:15,285 INFO L87 Difference]: Start difference. First operand 10422 states and 14663 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 15:54:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:16,519 INFO L93 Difference]: Finished difference Result 30836 states and 43263 transitions. [2022-11-23 15:54:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:54:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 106 [2022-11-23 15:54:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:16,729 INFO L225 Difference]: With dead ends: 30836 [2022-11-23 15:54:16,729 INFO L226 Difference]: Without dead ends: 20433 [2022-11-23 15:54:16,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:16,769 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 724 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:16,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1406 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:54:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20433 states. [2022-11-23 15:54:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20433 to 16183. [2022-11-23 15:54:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16183 states, 11063 states have (on average 1.3618367531411009) internal successors, (15066), 11350 states have internal predecessors, (15066), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1508 states have return successors, (3956), 3523 states have call predecessors, (3956), 3610 states have call successors, (3956) [2022-11-23 15:54:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16183 states to 16183 states and 22633 transitions. [2022-11-23 15:54:17,678 INFO L78 Accepts]: Start accepts. Automaton has 16183 states and 22633 transitions. Word has length 106 [2022-11-23 15:54:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:17,678 INFO L495 AbstractCegarLoop]: Abstraction has 16183 states and 22633 transitions. [2022-11-23 15:54:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 15:54:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 16183 states and 22633 transitions. [2022-11-23 15:54:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 15:54:17,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:17,689 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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, 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] [2022-11-23 15:54:17,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:54:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:54:17,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash 857034110, now seen corresponding path program 1 times [2022-11-23 15:54:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:17,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710997116] [2022-11-23 15:54:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:17,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:17,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:17,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714801833] [2022-11-23 15:54:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:17,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:17,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:17,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:17,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:54:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:54:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-23 15:54:18,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:18,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:18,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710997116] [2022-11-23 15:54:18,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714801833] [2022-11-23 15:54:18,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714801833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:18,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:18,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:54:18,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667133534] [2022-11-23 15:54:18,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:18,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:54:18,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:54:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:18,515 INFO L87 Difference]: Start difference. First operand 16183 states and 22633 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:54:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:19,565 INFO L93 Difference]: Finished difference Result 24481 states and 34660 transitions. [2022-11-23 15:54:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:54:19,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 106 [2022-11-23 15:54:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:19,646 INFO L225 Difference]: With dead ends: 24481 [2022-11-23 15:54:19,647 INFO L226 Difference]: Without dead ends: 16271 [2022-11-23 15:54:19,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:19,799 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 4 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:19,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1356 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:54:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16271 states. [2022-11-23 15:54:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16271 to 16271. [2022-11-23 15:54:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16271 states, 11129 states have (on average 1.359690897654776) internal successors, (15132), 11438 states have internal predecessors, (15132), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1530 states have return successors, (3998), 3523 states have call predecessors, (3998), 3610 states have call successors, (3998) [2022-11-23 15:54:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16271 states to 16271 states and 22741 transitions. [2022-11-23 15:54:20,564 INFO L78 Accepts]: Start accepts. Automaton has 16271 states and 22741 transitions. Word has length 106 [2022-11-23 15:54:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:20,566 INFO L495 AbstractCegarLoop]: Abstraction has 16271 states and 22741 transitions. [2022-11-23 15:54:20,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:54:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 16271 states and 22741 transitions. [2022-11-23 15:54:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 15:54:20,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:20,580 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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, 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] [2022-11-23 15:54:20,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 15:54:20,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:20,787 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1481355727, now seen corresponding path program 1 times [2022-11-23 15:54:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419615641] [2022-11-23 15:54:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:20,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:20,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:20,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354235946] [2022-11-23 15:54:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:20,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:20,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:20,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:54:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:54:21,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:54:21,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:21,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:21,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419615641] [2022-11-23 15:54:21,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:21,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354235946] [2022-11-23 15:54:21,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354235946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:21,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:21,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:54:21,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088066862] [2022-11-23 15:54:21,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:21,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:54:21,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:21,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:54:21,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:54:21,473 INFO L87 Difference]: Start difference. First operand 16271 states and 22741 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-23 15:54:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:25,447 INFO L93 Difference]: Finished difference Result 33305 states and 46934 transitions. [2022-11-23 15:54:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:54:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 107 [2022-11-23 15:54:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:25,509 INFO L225 Difference]: With dead ends: 33305 [2022-11-23 15:54:25,510 INFO L226 Difference]: Without dead ends: 17053 [2022-11-23 15:54:25,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:54:25,542 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 877 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:25,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 1999 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 15:54:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17053 states. [2022-11-23 15:54:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17053 to 16603. [2022-11-23 15:54:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16603 states, 11315 states have (on average 1.3507733097657977) internal successors, (15284), 11622 states have internal predecessors, (15284), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-23 15:54:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16603 states to 16603 states and 22937 transitions. [2022-11-23 15:54:26,451 INFO L78 Accepts]: Start accepts. Automaton has 16603 states and 22937 transitions. Word has length 107 [2022-11-23 15:54:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:26,452 INFO L495 AbstractCegarLoop]: Abstraction has 16603 states and 22937 transitions. [2022-11-23 15:54:26,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-23 15:54:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 16603 states and 22937 transitions. [2022-11-23 15:54:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 15:54:26,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:26,467 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 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, 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] [2022-11-23 15:54:26,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:54:26,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:54:26,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash 772223790, now seen corresponding path program 1 times [2022-11-23 15:54:26,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132145400] [2022-11-23 15:54:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:26,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:26,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:26,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333073896] [2022-11-23 15:54:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:26,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:26,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:26,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:26,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:54:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:54:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 15:54:27,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:27,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132145400] [2022-11-23 15:54:27,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333073896] [2022-11-23 15:54:27,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333073896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:27,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:27,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:54:27,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10816523] [2022-11-23 15:54:27,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:27,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:54:27,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:54:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:54:27,437 INFO L87 Difference]: Start difference. First operand 16603 states and 22937 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 15:54:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:29,012 INFO L93 Difference]: Finished difference Result 16753 states and 23152 transitions. [2022-11-23 15:54:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:54:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 116 [2022-11-23 15:54:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:29,073 INFO L225 Difference]: With dead ends: 16753 [2022-11-23 15:54:29,074 INFO L226 Difference]: Without dead ends: 16717 [2022-11-23 15:54:29,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:54:29,082 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 713 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:29,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1060 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:54:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16717 states. [2022-11-23 15:54:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16717 to 16615. [2022-11-23 15:54:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16615 states, 11327 states have (on average 1.3504016950648892) internal successors, (15296), 11634 states have internal predecessors, (15296), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-23 15:54:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16615 states to 16615 states and 22949 transitions. [2022-11-23 15:54:30,060 INFO L78 Accepts]: Start accepts. Automaton has 16615 states and 22949 transitions. Word has length 116 [2022-11-23 15:54:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:30,061 INFO L495 AbstractCegarLoop]: Abstraction has 16615 states and 22949 transitions. [2022-11-23 15:54:30,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 15:54:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 16615 states and 22949 transitions. [2022-11-23 15:54:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 15:54:30,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:30,074 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 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, 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] [2022-11-23 15:54:30,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:54:30,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:30,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2137238135, now seen corresponding path program 1 times [2022-11-23 15:54:30,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:30,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422898840] [2022-11-23 15:54:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:30,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:30,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:30,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868467546] [2022-11-23 15:54:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:30,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:30,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:30,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:54:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:30,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:54:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 15:54:30,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:54:30,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:30,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422898840] [2022-11-23 15:54:30,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:30,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868467546] [2022-11-23 15:54:30,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868467546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:54:30,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:54:30,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:54:30,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566199843] [2022-11-23 15:54:30,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:54:30,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:54:30,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:54:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:30,981 INFO L87 Difference]: Start difference. First operand 16615 states and 22949 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 15:54:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:31,652 INFO L93 Difference]: Finished difference Result 24975 states and 34511 transitions. [2022-11-23 15:54:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:54:31,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2022-11-23 15:54:31,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:31,683 INFO L225 Difference]: With dead ends: 24975 [2022-11-23 15:54:31,683 INFO L226 Difference]: Without dead ends: 8071 [2022-11-23 15:54:31,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:54:31,716 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 692 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:31,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 921 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:54:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2022-11-23 15:54:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 8071. [2022-11-23 15:54:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8071 states, 5486 states have (on average 1.344331024425811) internal successors, (7375), 5642 states have internal predecessors, (7375), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2022-11-23 15:54:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8071 states to 8071 states and 11118 transitions. [2022-11-23 15:54:32,121 INFO L78 Accepts]: Start accepts. Automaton has 8071 states and 11118 transitions. Word has length 118 [2022-11-23 15:54:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:32,122 INFO L495 AbstractCegarLoop]: Abstraction has 8071 states and 11118 transitions. [2022-11-23 15:54:32,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 15:54:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8071 states and 11118 transitions. [2022-11-23 15:54:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 15:54:32,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:32,130 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 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, 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] [2022-11-23 15:54:32,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 15:54:32,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:54:32,338 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1453794403, now seen corresponding path program 1 times [2022-11-23 15:54:32,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:32,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668947594] [2022-11-23 15:54:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:32,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:32,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:54:32,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977943368] [2022-11-23 15:54:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:32,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:32,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:32,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:54:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:54:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 15:54:33,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:54:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 15:54:33,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668947594] [2022-11-23 15:54:33,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:54:33,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977943368] [2022-11-23 15:54:33,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977943368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:54:33,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688188731] [2022-11-23 15:54:33,350 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-11-23 15:54:33,351 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:54:33,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:54:33,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:54:33,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:54:34,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-23 15:54:34,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-23 15:54:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:35,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:35,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:35,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-23 15:54:36,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:36,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:36,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:54:36,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-23 15:54:56,192 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 82 for LOIs [2022-11-23 15:54:56,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:55:13,340 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 638 DAG size of output: 636 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:55:19,736 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 650 DAG size of output: 648 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:55:26,364 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 661 DAG size of output: 652 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:55:33,384 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 671 DAG size of output: 662 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:55:40,433 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 679 DAG size of output: 666 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:55:48,377 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 713 DAG size of output: 700 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:55:56,734 WARN L233 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 736 DAG size of output: 705 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:05,315 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 748 DAG size of output: 717 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:14,228 WARN L233 SmtUtils]: Spent 8.61s on a formula simplification. DAG size of input: 759 DAG size of output: 728 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:23,243 WARN L233 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 761 DAG size of output: 730 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:32,103 WARN L233 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 751 DAG size of output: 720 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:41,280 WARN L233 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 762 DAG size of output: 731 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:50,611 WARN L233 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 764 DAG size of output: 733 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:59,617 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 754 DAG size of output: 723 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:09,288 WARN L233 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 785 DAG size of output: 746 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:18,544 WARN L233 SmtUtils]: Spent 8.83s on a formula simplification. DAG size of input: 764 DAG size of output: 733 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:27,487 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 752 DAG size of output: 721 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:36,574 WARN L233 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 754 DAG size of output: 723 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:36,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1688188731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:57:36,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:57:36,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [4, 5] total 32 [2022-11-23 15:57:36,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014837467] [2022-11-23 15:57:36,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:57:36,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 15:57:36,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:57:36,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 15:57:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-11-23 15:57:36,582 INFO L87 Difference]: Start difference. First operand 8071 states and 11118 transitions. Second operand has 26 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-23 15:57:46,274 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 801 DAG size of output: 800 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:55,968 WARN L233 SmtUtils]: Spent 9.45s on a formula simplification. DAG size of input: 809 DAG size of output: 808 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:58:05,749 WARN L233 SmtUtils]: Spent 9.54s on a formula simplification. DAG size of input: 815 DAG size of output: 814 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:58:37,735 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 842 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:58:43,652 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 846 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:58:49,839 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification that was a NOOP. DAG size: 880 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:58:56,501 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 885 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:59:28,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:28,605 INFO L93 Difference]: Finished difference Result 16175 states and 22299 transitions. [2022-11-23 15:59:28,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 15:59:28,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 121 [2022-11-23 15:59:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:28,634 INFO L225 Difference]: With dead ends: 16175 [2022-11-23 15:59:28,635 INFO L226 Difference]: Without dead ends: 8123 [2022-11-23 15:59:28,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 236.4s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 15:59:28,652 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 76 mSDsluCounter, 7596 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 8253 SdHoareTripleChecker+Invalid, 4540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:28,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 8253 Invalid, 4540 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 35.3s Time] [2022-11-23 15:59:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2022-11-23 15:59:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 8100. [2022-11-23 15:59:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8100 states, 5510 states have (on average 1.3439201451905627) internal successors, (7405), 5666 states have internal predecessors, (7405), 1816 states have call successors, (1816), 737 states have call predecessors, (1816), 773 states have return successors, (1944), 1793 states have call predecessors, (1944), 1815 states have call successors, (1944) [2022-11-23 15:59:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8100 states to 8100 states and 11165 transitions. [2022-11-23 15:59:29,186 INFO L78 Accepts]: Start accepts. Automaton has 8100 states and 11165 transitions. Word has length 121 [2022-11-23 15:59:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:29,187 INFO L495 AbstractCegarLoop]: Abstraction has 8100 states and 11165 transitions. [2022-11-23 15:59:29,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-23 15:59:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8100 states and 11165 transitions. [2022-11-23 15:59:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:59:29,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:29,197 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 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, 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] [2022-11-23 15:59:29,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:29,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:29,404 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash 785051788, now seen corresponding path program 1 times [2022-11-23 15:59:29,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:29,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597248284] [2022-11-23 15:59:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:29,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:29,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:59:29,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490721406] [2022-11-23 15:59:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:29,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:29,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:29,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:29,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:59:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:29,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:59:29,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 15:59:30,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 15:59:30,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:30,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597248284] [2022-11-23 15:59:30,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:59:30,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490721406] [2022-11-23 15:59:30,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490721406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085668229] [2022-11-23 15:59:30,262 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-11-23 15:59:30,263 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:30,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:30,263 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:30,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:30,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-23 15:59:30,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-23 15:59:31,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:59:31,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:59:31,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-23 15:59:32,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:32,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:32,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:32,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-23 15:59:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:33,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:33,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:59:33,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-23 15:59:38,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 15:59:38,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-23 15:59:38,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 15:59:42,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 15:59:42,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 15:59:42,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-23 15:59:51,991 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 154 for LOIs [2022-11-23 15:59:52,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:59:52,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:59:52,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-23 15:59:53,501 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 182 for LOIs [2022-11-23 15:59:53,652 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:00:18,047 WARN L233 SmtUtils]: Spent 17.76s on a formula simplification. DAG size of input: 713 DAG size of output: 673 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:00:35,766 WARN L233 SmtUtils]: Spent 17.52s on a formula simplification. DAG size of input: 723 DAG size of output: 651 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:01:02,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1085668229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:02,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:01:02,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 5] total 36 [2022-11-23 16:01:02,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797010281] [2022-11-23 16:01:02,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:02,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 16:01:02,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:02,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 16:01:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 16:01:02,720 INFO L87 Difference]: Start difference. First operand 8100 states and 11165 transitions. Second operand has 30 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-23 16:01:14,146 WARN L233 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 863 DAG size of output: 811 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:01:25,731 WARN L233 SmtUtils]: Spent 11.26s on a formula simplification. DAG size of input: 871 DAG size of output: 819 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:01:37,400 WARN L233 SmtUtils]: Spent 11.37s on a formula simplification. DAG size of input: 876 DAG size of output: 822 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:01:50,504 WARN L233 SmtUtils]: Spent 12.64s on a formula simplification. DAG size of input: 899 DAG size of output: 845 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:02:01,564 WARN L233 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 851 DAG size of output: 829 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:02:21,361 WARN L233 SmtUtils]: Spent 19.43s on a formula simplification. DAG size of input: 881 DAG size of output: 830 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:02:32,804 WARN L233 SmtUtils]: Spent 11.09s on a formula simplification. DAG size of input: 855 DAG size of output: 833 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:02:54,188 WARN L233 SmtUtils]: Spent 21.03s on a formula simplification. DAG size of input: 828 DAG size of output: 828 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:05,300 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification. DAG size of input: 844 DAG size of output: 842 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:16,717 WARN L233 SmtUtils]: Spent 10.96s on a formula simplification. DAG size of input: 854 DAG size of output: 845 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:27,728 WARN L233 SmtUtils]: Spent 10.53s on a formula simplification. DAG size of input: 840 DAG size of output: 812 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:38,044 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification. DAG size of input: 823 DAG size of output: 819 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:48,788 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 830 DAG size of output: 821 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:03:59,426 WARN L233 SmtUtils]: Spent 10.37s on a formula simplification. DAG size of input: 841 DAG size of output: 832 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:10,492 WARN L233 SmtUtils]: Spent 10.51s on a formula simplification. DAG size of input: 845 DAG size of output: 834 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:22,437 WARN L233 SmtUtils]: Spent 11.63s on a formula simplification. DAG size of input: 880 DAG size of output: 869 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:36,188 WARN L233 SmtUtils]: Spent 13.15s on a formula simplification. DAG size of input: 929 DAG size of output: 896 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:04:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:58,455 INFO L93 Difference]: Finished difference Result 16179 states and 22297 transitions. [2022-11-23 16:04:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 16:04:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 123 [2022-11-23 16:04:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:58,486 INFO L225 Difference]: With dead ends: 16179 [2022-11-23 16:04:58,487 INFO L226 Difference]: Without dead ends: 8127 [2022-11-23 16:04:58,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 279.5s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 16:04:58,506 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 48 mSDsluCounter, 11901 mSDsCounter, 0 mSdLazyCounter, 6365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 12558 SdHoareTripleChecker+Invalid, 6388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 6365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:58,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 12558 Invalid, 6388 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [23 Valid, 6365 Invalid, 0 Unknown, 0 Unchecked, 24.6s Time] [2022-11-23 16:04:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8127 states. [2022-11-23 16:04:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8127 to 8089. [2022-11-23 16:04:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8089 states, 5504 states have (on average 1.344295058139535) internal successors, (7399), 5660 states have internal predecessors, (7399), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2022-11-23 16:04:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8089 states to 8089 states and 11142 transitions. [2022-11-23 16:04:59,077 INFO L78 Accepts]: Start accepts. Automaton has 8089 states and 11142 transitions. Word has length 123 [2022-11-23 16:04:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:59,077 INFO L495 AbstractCegarLoop]: Abstraction has 8089 states and 11142 transitions. [2022-11-23 16:04:59,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-23 16:04:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 8089 states and 11142 transitions. [2022-11-23 16:04:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 16:04:59,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:59,086 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 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, 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] [2022-11-23 16:04:59,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 16:04:59,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 16:04:59,294 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash 942720917, now seen corresponding path program 1 times [2022-11-23 16:04:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:59,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309726691] [2022-11-23 16:04:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:59,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:04:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712057349] [2022-11-23 16:04:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:59,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:04:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:04:59,346 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:04:59,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e28a9e-329f-4305-971a-45d0246d86c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 16:04:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:59,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:04:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:05:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 16:05:00,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:05:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:05:00,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:05:00,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309726691] [2022-11-23 16:05:00,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:05:00,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712057349] [2022-11-23 16:05:00,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712057349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:05:00,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540168222] [2022-11-23 16:05:00,161 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-23 16:05:00,161 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:05:00,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:05:00,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:05:00,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:05:00,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-23 16:05:00,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-23 16:05:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:01,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-23 16:05:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:02,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-23 16:05:49,461 INFO L197 IcfgInterpreter]: Interpreting procedure __kmalloc with input of size 630 for LOIs [2022-11-23 16:05:51,138 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 82 for LOIs [2022-11-23 16:05:51,156 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 630 for LOIs [2022-11-23 16:05:51,586 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:06:08,912 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 638 DAG size of output: 636 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:06:15,503 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 650 DAG size of output: 648 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:06:22,283 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 661 DAG size of output: 652 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:06:29,310 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 671 DAG size of output: 662 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:06:36,583 WARN L233 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 679 DAG size of output: 666 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:06:44,915 WARN L233 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 713 DAG size of output: 700 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:06:53,616 WARN L233 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 736 DAG size of output: 705 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:02,691 WARN L233 SmtUtils]: Spent 8.77s on a formula simplification. DAG size of input: 748 DAG size of output: 717 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:12,119 WARN L233 SmtUtils]: Spent 9.09s on a formula simplification. DAG size of input: 759 DAG size of output: 728 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:21,462 WARN L233 SmtUtils]: Spent 9.02s on a formula simplification. DAG size of input: 761 DAG size of output: 730 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:30,521 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 751 DAG size of output: 720 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:40,049 WARN L233 SmtUtils]: Spent 9.11s on a formula simplification. DAG size of input: 762 DAG size of output: 731 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)