./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c802d0dd4f8edaf03f1251784a424c8f295192f6a4e7c65ec93469eacce08251 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:34:44,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:34:44,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:34:44,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:34:44,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:34:44,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:34:44,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:34:44,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:34:44,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:34:44,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:34:44,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:34:44,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:34:44,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:34:44,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:34:44,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:34:44,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:34:44,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:34:44,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:34:44,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:34:44,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:34:44,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:34:44,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:34:44,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:34:44,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:34:44,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:34:44,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:34:44,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:34:44,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:34:44,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:34:44,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:34:44,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:34:44,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:34:44,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:34:44,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:34:44,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:34:44,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:34:44,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:34:44,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:34:44,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:34:44,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:34:44,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:34:44,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:34:44,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:34:44,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:34:44,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:34:44,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:34:44,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:34:44,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:34:44,352 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:34:44,352 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:34:44,352 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:34:44,352 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:34:44,353 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:34:44,353 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:34:44,354 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:34:44,354 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:34:44,354 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:34:44,354 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:34:44,354 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:34:44,355 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:34:44,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:34:44,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:34:44,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:34:44,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:34:44,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:34:44,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:34:44,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:34:44,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:34:44,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:34:44,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:34:44,359 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:34:44,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:34:44,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:34:44,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:34:44,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:44,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:34:44,360 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:34:44,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:34:44,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:34:44,361 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:34:44,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:34:44,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:34:44,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:34:44,362 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_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c802d0dd4f8edaf03f1251784a424c8f295192f6a4e7c65ec93469eacce08251 [2022-11-03 02:34:44,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:34:44,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:34:44,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:34:44,674 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:34:44,675 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:34:44,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c [2022-11-03 02:34:44,749 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/data/663aa15b7/7a8940bbd2b64e62b12a04f7121d3552/FLAGc912e8ddb [2022-11-03 02:34:45,259 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:34:45,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c [2022-11-03 02:34:45,275 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/data/663aa15b7/7a8940bbd2b64e62b12a04f7121d3552/FLAGc912e8ddb [2022-11-03 02:34:45,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/data/663aa15b7/7a8940bbd2b64e62b12a04f7121d3552 [2022-11-03 02:34:45,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:34:45,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:34:45,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:45,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:34:45,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:34:45,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:45" (1/1) ... [2022-11-03 02:34:45,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9c0b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:45, skipping insertion in model container [2022-11-03 02:34:45,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:45" (1/1) ... [2022-11-03 02:34:45,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:34:45,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:34:45,908 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c[44628,44641] [2022-11-03 02:34:45,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:45,936 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:34:45,988 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/sv-benchmarks/c/bitvector/s3_srvr_3a_alt.BV.c.cil.c[44628,44641] [2022-11-03 02:34:45,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:46,003 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:34:46,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46 WrapperNode [2022-11-03 02:34:46,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:46,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:46,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:34:46,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:34:46,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,055 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 522 [2022-11-03 02:34:46,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:46,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:34:46,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:34:46,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:34:46,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,100 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:34:46,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:34:46,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:34:46,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:34:46,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (1/1) ... [2022-11-03 02:34:46,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:46,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:34:46,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:34:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:34:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:34:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:34:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:34:46,332 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:34:46,334 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:34:46,364 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-03 02:34:46,926 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-11-03 02:34:46,927 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-11-03 02:34:46,927 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:34:47,075 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:34:47,076 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:34:47,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:47 BoogieIcfgContainer [2022-11-03 02:34:47,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:34:47,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:34:47,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:34:47,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:34:47,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:34:45" (1/3) ... [2022-11-03 02:34:47,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3862b110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:47, skipping insertion in model container [2022-11-03 02:34:47,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:46" (2/3) ... [2022-11-03 02:34:47,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3862b110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:47, skipping insertion in model container [2022-11-03 02:34:47,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:47" (3/3) ... [2022-11-03 02:34:47,087 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr_3a_alt.BV.c.cil.c [2022-11-03 02:34:47,105 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:34:47,106 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:34:47,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:34:47,177 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;@68619a66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:34:47,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:34:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 102 states have (on average 1.7843137254901962) internal successors, (182), 103 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:34:47,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:47,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:47,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1721560473, now seen corresponding path program 1 times [2022-11-03 02:34:47,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:47,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572731916] [2022-11-03 02:34:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:47,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:47,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572731916] [2022-11-03 02:34:47,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572731916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:47,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:47,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:34:47,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912759116] [2022-11-03 02:34:47,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:47,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:47,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:47,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:47,782 INFO L87 Difference]: Start difference. First operand has 104 states, 102 states have (on average 1.7843137254901962) internal successors, (182), 103 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:48,030 INFO L93 Difference]: Finished difference Result 215 states and 374 transitions. [2022-11-03 02:34:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-03 02:34:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:48,047 INFO L225 Difference]: With dead ends: 215 [2022-11-03 02:34:48,047 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 02:34:48,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:48,056 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:48,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:34:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 02:34:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-11-03 02:34:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.4509803921568627) internal successors, (148), 102 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-11-03 02:34:48,123 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 39 [2022-11-03 02:34:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:48,124 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-11-03 02:34:48,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-11-03 02:34:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:34:48,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:48,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:48,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:34:48,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash -836000812, now seen corresponding path program 1 times [2022-11-03 02:34:48,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:48,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259123650] [2022-11-03 02:34:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:48,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:48,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:48,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259123650] [2022-11-03 02:34:48,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259123650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:48,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:48,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078134160] [2022-11-03 02:34:48,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:48,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:48,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:48,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:48,274 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:48,452 INFO L93 Difference]: Finished difference Result 215 states and 315 transitions. [2022-11-03 02:34:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:48,453 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-03 02:34:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:48,454 INFO L225 Difference]: With dead ends: 215 [2022-11-03 02:34:48,455 INFO L226 Difference]: Without dead ends: 124 [2022-11-03 02:34:48,455 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 [2022-11-03 02:34:48,457 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:48,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 170 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-03 02:34:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-03 02:34:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.4049586776859504) internal successors, (170), 121 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 170 transitions. [2022-11-03 02:34:48,469 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 170 transitions. Word has length 53 [2022-11-03 02:34:48,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:48,470 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 170 transitions. [2022-11-03 02:34:48,470 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 170 transitions. [2022-11-03 02:34:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:34:48,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:48,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:34:48,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:34:48,473 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash 735763446, now seen corresponding path program 1 times [2022-11-03 02:34:48,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:48,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238633925] [2022-11-03 02:34:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:48,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:34:48,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:48,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238633925] [2022-11-03 02:34:48,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238633925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:48,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:48,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:48,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998074317] [2022-11-03 02:34:48,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:48,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:48,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:48,636 INFO L87 Difference]: Start difference. First operand 122 states and 170 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:48,943 INFO L93 Difference]: Finished difference Result 276 states and 402 transitions. [2022-11-03 02:34:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:34:48,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-03 02:34:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:48,945 INFO L225 Difference]: With dead ends: 276 [2022-11-03 02:34:48,950 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 02:34:48,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:48,952 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 30 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:48,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 218 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:34:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 02:34:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2022-11-03 02:34:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3333333333333333) internal successors, (212), 159 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 212 transitions. [2022-11-03 02:34:48,980 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 212 transitions. Word has length 70 [2022-11-03 02:34:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:48,980 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 212 transitions. [2022-11-03 02:34:48,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 212 transitions. [2022-11-03 02:34:48,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:34:48,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:48,983 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-11-03 02:34:48,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:34:48,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:48,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:48,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1739467776, now seen corresponding path program 1 times [2022-11-03 02:34:48,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:48,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148102396] [2022-11-03 02:34:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:48,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:34:49,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:49,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148102396] [2022-11-03 02:34:49,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148102396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:49,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:49,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:49,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186090527] [2022-11-03 02:34:49,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:49,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:49,115 INFO L87 Difference]: Start difference. First operand 160 states and 212 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:49,266 INFO L93 Difference]: Finished difference Result 341 states and 465 transitions. [2022-11-03 02:34:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-03 02:34:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:49,268 INFO L225 Difference]: With dead ends: 341 [2022-11-03 02:34:49,269 INFO L226 Difference]: Without dead ends: 193 [2022-11-03 02:34:49,269 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 [2022-11-03 02:34:49,270 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:49,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 181 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-03 02:34:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2022-11-03 02:34:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.3076923076923077) internal successors, (238), 182 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 238 transitions. [2022-11-03 02:34:49,292 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 238 transitions. Word has length 89 [2022-11-03 02:34:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:49,292 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 238 transitions. [2022-11-03 02:34:49,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 238 transitions. [2022-11-03 02:34:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:34:49,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:49,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:49,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:34:49,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:49,302 INFO L85 PathProgramCache]: Analyzing trace with hash -245002917, now seen corresponding path program 1 times [2022-11-03 02:34:49,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:49,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023618565] [2022-11-03 02:34:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:49,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:49,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:49,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023618565] [2022-11-03 02:34:49,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023618565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:34:49,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535371420] [2022-11-03 02:34:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:49,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:49,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:49,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:49,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:34:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:49,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:49,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:49,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-03 02:34:50,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535371420] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:34:50,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:34:50,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 6 [2022-11-03 02:34:50,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532530948] [2022-11-03 02:34:50,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:50,148 INFO L87 Difference]: Start difference. First operand 183 states and 238 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:50,200 INFO L93 Difference]: Finished difference Result 353 states and 463 transitions. [2022-11-03 02:34:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 02:34:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:50,208 INFO L225 Difference]: With dead ends: 353 [2022-11-03 02:34:50,209 INFO L226 Difference]: Without dead ends: 351 [2022-11-03 02:34:50,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:50,212 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 84 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:50,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 246 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:34:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-03 02:34:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 350. [2022-11-03 02:34:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.3180515759312321) internal successors, (460), 349 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 460 transitions. [2022-11-03 02:34:50,255 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 460 transitions. Word has length 108 [2022-11-03 02:34:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:50,256 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 460 transitions. [2022-11-03 02:34:50,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 460 transitions. [2022-11-03 02:34:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:34:50,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:50,261 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:34:50,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:50,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:50,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1820991148, now seen corresponding path program 1 times [2022-11-03 02:34:50,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:50,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634488147] [2022-11-03 02:34:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:50,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:34:50,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165014734] [2022-11-03 02:34:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:50,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:50,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:50,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:50,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:34:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:34:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:34:50,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:50,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:50,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634488147] [2022-11-03 02:34:50,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:34:50,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165014734] [2022-11-03 02:34:50,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165014734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:50,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:50,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:50,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108648473] [2022-11-03 02:34:50,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:50,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:50,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:50,705 INFO L87 Difference]: Start difference. First operand 350 states and 460 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:50,867 INFO L93 Difference]: Finished difference Result 770 states and 1052 transitions. [2022-11-03 02:34:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-11-03 02:34:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:50,870 INFO L225 Difference]: With dead ends: 770 [2022-11-03 02:34:50,870 INFO L226 Difference]: Without dead ends: 432 [2022-11-03 02:34:50,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:50,872 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:50,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-03 02:34:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2022-11-03 02:34:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.2740046838407495) internal successors, (544), 427 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 544 transitions. [2022-11-03 02:34:50,886 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 544 transitions. Word has length 142 [2022-11-03 02:34:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:50,887 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 544 transitions. [2022-11-03 02:34:50,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 544 transitions. [2022-11-03 02:34:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:34:50,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:50,889 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:50,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:51,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:34:51,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -800930616, now seen corresponding path program 1 times [2022-11-03 02:34:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054890272] [2022-11-03 02:34:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:51,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:51,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:34:51,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432171887] [2022-11-03 02:34:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:51,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:51,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:51,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:34:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:34:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:34:51,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:51,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054890272] [2022-11-03 02:34:51,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:34:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432171887] [2022-11-03 02:34:51,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432171887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:51,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:51,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:51,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432790528] [2022-11-03 02:34:51,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:51,319 INFO L87 Difference]: Start difference. First operand 428 states and 544 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:51,485 INFO L93 Difference]: Finished difference Result 940 states and 1244 transitions. [2022-11-03 02:34:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:51,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-11-03 02:34:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:51,487 INFO L225 Difference]: With dead ends: 940 [2022-11-03 02:34:51,488 INFO L226 Difference]: Without dead ends: 500 [2022-11-03 02:34:51,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:51,489 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 56 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:51,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 130 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-03 02:34:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 486. [2022-11-03 02:34:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.3072164948453608) internal successors, (634), 485 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 634 transitions. [2022-11-03 02:34:51,504 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 634 transitions. Word has length 147 [2022-11-03 02:34:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:51,505 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 634 transitions. [2022-11-03 02:34:51,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 634 transitions. [2022-11-03 02:34:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-03 02:34:51,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:51,507 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:51,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:51,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:51,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash 186140274, now seen corresponding path program 1 times [2022-11-03 02:34:51,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:51,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691600722] [2022-11-03 02:34:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:51,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:51,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:51,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691600722] [2022-11-03 02:34:51,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:34:51,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756674322] [2022-11-03 02:34:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:51,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:51,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:51,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:51,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:34:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:34:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-03 02:34:51,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756674322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:51,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:51,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180565919] [2022-11-03 02:34:51,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:51,957 INFO L87 Difference]: Start difference. First operand 486 states and 634 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:52,112 INFO L93 Difference]: Finished difference Result 1046 states and 1404 transitions. [2022-11-03 02:34:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2022-11-03 02:34:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:52,115 INFO L225 Difference]: With dead ends: 1046 [2022-11-03 02:34:52,115 INFO L226 Difference]: Without dead ends: 548 [2022-11-03 02:34:52,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:52,116 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 59 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:52,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 120 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-11-03 02:34:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 540. [2022-11-03 02:34:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.3432282003710576) internal successors, (724), 539 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 724 transitions. [2022-11-03 02:34:52,134 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 724 transitions. Word has length 169 [2022-11-03 02:34:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:52,134 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 724 transitions. [2022-11-03 02:34:52,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 724 transitions. [2022-11-03 02:34:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:34:52,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:52,137 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2022-11-03 02:34:52,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:52,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:52,362 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1636497485, now seen corresponding path program 1 times [2022-11-03 02:34:52,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:52,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278429893] [2022-11-03 02:34:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:52,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278429893] [2022-11-03 02:34:52,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:34:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334321868] [2022-11-03 02:34:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:52,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:52,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:52,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:52,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:34:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:52,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:34:52,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-03 02:34:52,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:52,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334321868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:52,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:52,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426247939] [2022-11-03 02:34:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:52,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:52,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:52,574 INFO L87 Difference]: Start difference. First operand 540 states and 724 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:52,767 INFO L93 Difference]: Finished difference Result 1208 states and 1670 transitions. [2022-11-03 02:34:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-11-03 02:34:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:52,770 INFO L225 Difference]: With dead ends: 1208 [2022-11-03 02:34:52,770 INFO L226 Difference]: Without dead ends: 672 [2022-11-03 02:34:52,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:52,772 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 45 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:52,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 154 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:34:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-03 02:34:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 648. [2022-11-03 02:34:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.276661514683153) internal successors, (826), 647 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 826 transitions. [2022-11-03 02:34:52,794 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 826 transitions. Word has length 174 [2022-11-03 02:34:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:52,794 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 826 transitions. [2022-11-03 02:34:52,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 826 transitions. [2022-11-03 02:34:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-03 02:34:52,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:52,797 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2022-11-03 02:34:52,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:53,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:53,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:53,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1250272793, now seen corresponding path program 1 times [2022-11-03 02:34:53,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:53,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708654655] [2022-11-03 02:34:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:53,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:53,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:34:53,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509116238] [2022-11-03 02:34:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:53,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:53,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:53,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:34:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:34:53,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-03 02:34:53,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:53,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708654655] [2022-11-03 02:34:53,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:34:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509116238] [2022-11-03 02:34:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509116238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:53,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:53,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:34:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567331412] [2022-11-03 02:34:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:53,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:34:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:34:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:53,364 INFO L87 Difference]: Start difference. First operand 648 states and 826 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:53,570 INFO L93 Difference]: Finished difference Result 1389 states and 1808 transitions. [2022-11-03 02:34:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:34:53,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2022-11-03 02:34:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:53,574 INFO L225 Difference]: With dead ends: 1389 [2022-11-03 02:34:53,574 INFO L226 Difference]: Without dead ends: 692 [2022-11-03 02:34:53,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:34:53,575 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 48 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:53,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 191 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:34:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-11-03 02:34:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 669. [2022-11-03 02:34:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 1.2664670658682635) internal successors, (846), 668 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 846 transitions. [2022-11-03 02:34:53,597 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 846 transitions. Word has length 200 [2022-11-03 02:34:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:53,597 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 846 transitions. [2022-11-03 02:34:53,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 846 transitions. [2022-11-03 02:34:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-03 02:34:53,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:53,601 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-03 02:34:53,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:53,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:34:53,821 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:53,822 INFO L85 PathProgramCache]: Analyzing trace with hash -20273858, now seen corresponding path program 1 times [2022-11-03 02:34:53,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:53,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295965879] [2022-11-03 02:34:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:53,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:53,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:34:53,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677132694] [2022-11-03 02:34:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:53,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:53,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:53,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:53,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84f25c28-52fb-4d08-902b-29faa7a3659c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:34:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:34:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 02:34:54,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 02:34:54,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:54,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295965879] [2022-11-03 02:34:54,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:34:54,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677132694] [2022-11-03 02:34:54,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677132694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088724038] [2022-11-03 02:34:54,236 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-03 02:34:54,237 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:34:54,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:34:54,247 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:34:54,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs