./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label58.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label58.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 07792715f910a6428c32d8dd46a29e2e155fdc408a1bb959e7d2fa19719ab855 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:06:04,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:06:04,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:06:04,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:06:04,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:06:04,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:06:04,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:06:04,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:06:04,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:06:04,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:06:04,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:06:04,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:06:04,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:06:04,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:06:04,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:06:04,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:06:04,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:06:04,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:06:04,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:06:04,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:06:04,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:06:04,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:06:04,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:06:04,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:06:04,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:06:04,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:06:04,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:06:04,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:06:04,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:06:04,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:06:04,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:06:04,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:06:04,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:06:04,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:06:04,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:06:04,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:06:04,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:06:04,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:06:04,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:06:04,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:06:04,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:06:04,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:06:04,335 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:06:04,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:06:04,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:06:04,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:06:04,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:06:04,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:06:04,337 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:06:04,337 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:06:04,338 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:06:04,338 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:06:04,338 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:06:04,338 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:06:04,338 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:06:04,339 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:06:04,339 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:06:04,339 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:06:04,339 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:06:04,340 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:06:04,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:06:04,340 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:06:04,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:06:04,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:06:04,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:06:04,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:06:04,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:06:04,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:06:04,342 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:06:04,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:06:04,342 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:06:04,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:06:04,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:06:04,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:06:04,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:06:04,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:06:04,344 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:06:04,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:06:04,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:06:04,344 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:06:04,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:06:04,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:06:04,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:06:04,345 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_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07792715f910a6428c32d8dd46a29e2e155fdc408a1bb959e7d2fa19719ab855 [2022-11-23 14:06:04,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:06:04,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:06:04,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:06:04,603 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:06:04,604 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:06:04,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/eca-rers2012/Problem03_label58.c [2022-11-23 14:06:07,743 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:06:08,187 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:06:08,187 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/sv-benchmarks/c/eca-rers2012/Problem03_label58.c [2022-11-23 14:06:08,205 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/data/ae38dc31f/e2c7d7f019a244ccafb2cac896c3dce3/FLAG55791f1f1 [2022-11-23 14:06:08,228 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/data/ae38dc31f/e2c7d7f019a244ccafb2cac896c3dce3 [2022-11-23 14:06:08,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:06:08,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:06:08,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:06:08,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:06:08,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:06:08,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:08" (1/1) ... [2022-11-23 14:06:08,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6007cea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:08, skipping insertion in model container [2022-11-23 14:06:08,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:08" (1/1) ... [2022-11-23 14:06:08,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:06:08,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:06:08,991 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/sv-benchmarks/c/eca-rers2012/Problem03_label58.c[55815,55828] [2022-11-23 14:06:09,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:06:09,087 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:06:09,370 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/sv-benchmarks/c/eca-rers2012/Problem03_label58.c[55815,55828] [2022-11-23 14:06:09,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:06:09,407 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:06:09,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09 WrapperNode [2022-11-23 14:06:09,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:06:09,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:06:09,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:06:09,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:06:09,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,582 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-23 14:06:09,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:06:09,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:06:09,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:06:09,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:06:09,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,723 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:06:09,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:06:09,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:06:09,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:06:09,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (1/1) ... [2022-11-23 14:06:09,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:06:09,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:09,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:06:09,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:06:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:06:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:06:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:06:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:06:09,932 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:06:09,934 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:06:11,934 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:06:12,344 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:06:12,344 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:06:12,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:12 BoogieIcfgContainer [2022-11-23 14:06:12,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:06:12,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:06:12,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:06:12,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:06:12,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:08" (1/3) ... [2022-11-23 14:06:12,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aec9be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:12, skipping insertion in model container [2022-11-23 14:06:12,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:09" (2/3) ... [2022-11-23 14:06:12,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aec9be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:12, skipping insertion in model container [2022-11-23 14:06:12,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:12" (3/3) ... [2022-11-23 14:06:12,357 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label58.c [2022-11-23 14:06:12,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:06:12,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:06:12,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:06:12,440 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;@4cf0a38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:06:12,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:06:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2022-11-23 14:06:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:06:12,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:12,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:12,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1724865288, now seen corresponding path program 1 times [2022-11-23 14:06:12,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:12,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399630096] [2022-11-23 14:06:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:12,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:13,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:13,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399630096] [2022-11-23 14:06:13,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399630096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:13,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:13,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:13,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259152948] [2022-11-23 14:06:13,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:13,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:13,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:13,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:13,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:13,548 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-23 14:06:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:14,531 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-23 14:06:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:14,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2022-11-23 14:06:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:14,546 INFO L225 Difference]: With dead ends: 440 [2022-11-23 14:06:14,546 INFO L226 Difference]: Without dead ends: 289 [2022-11-23 14:06:14,549 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 [2022-11-23 14:06:14,552 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:14,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:06:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-23 14:06:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-23 14:06:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8680555555555556) internal successors, (538), 288 states have internal predecessors, (538), 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) [2022-11-23 14:06:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 538 transitions. [2022-11-23 14:06:14,629 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 538 transitions. Word has length 143 [2022-11-23 14:06:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:14,630 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 538 transitions. [2022-11-23 14:06:14,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-23 14:06:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 538 transitions. [2022-11-23 14:06:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 14:06:14,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:14,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:06:14,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1932981294, now seen corresponding path program 1 times [2022-11-23 14:06:14,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:14,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568585918] [2022-11-23 14:06:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:15,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:15,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568585918] [2022-11-23 14:06:15,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568585918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:15,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:15,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358407894] [2022-11-23 14:06:15,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:15,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:15,103 INFO L87 Difference]: Start difference. First operand 289 states and 538 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2022-11-23 14:06:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:16,011 INFO L93 Difference]: Finished difference Result 865 states and 1612 transitions. [2022-11-23 14:06:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 [2022-11-23 14:06:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:16,015 INFO L225 Difference]: With dead ends: 865 [2022-11-23 14:06:16,015 INFO L226 Difference]: Without dead ends: 577 [2022-11-23 14:06:16,021 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 [2022-11-23 14:06:16,025 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 187 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:16,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 41 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:06:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-23 14:06:16,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-11-23 14:06:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8344947735191637) internal successors, (1053), 574 states have internal predecessors, (1053), 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) [2022-11-23 14:06:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1053 transitions. [2022-11-23 14:06:16,060 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1053 transitions. Word has length 147 [2022-11-23 14:06:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:16,060 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1053 transitions. [2022-11-23 14:06:16,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2022-11-23 14:06:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1053 transitions. [2022-11-23 14:06:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-23 14:06:16,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:16,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:16,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:06:16,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:16,067 INFO L85 PathProgramCache]: Analyzing trace with hash -688086574, now seen corresponding path program 1 times [2022-11-23 14:06:16,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:16,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072666416] [2022-11-23 14:06:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:16,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072666416] [2022-11-23 14:06:16,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072666416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:16,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:16,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138189905] [2022-11-23 14:06:16,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:16,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:16,422 INFO L87 Difference]: Start difference. First operand 575 states and 1053 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-11-23 14:06:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:17,498 INFO L93 Difference]: Finished difference Result 1721 states and 3156 transitions. [2022-11-23 14:06:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2022-11-23 14:06:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:17,505 INFO L225 Difference]: With dead ends: 1721 [2022-11-23 14:06:17,505 INFO L226 Difference]: Without dead ends: 1147 [2022-11-23 14:06:17,507 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 [2022-11-23 14:06:17,508 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:17,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 43 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:06:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-23 14:06:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-11-23 14:06:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7155322862129145) internal successors, (1966), 1146 states have internal predecessors, (1966), 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) [2022-11-23 14:06:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1966 transitions. [2022-11-23 14:06:17,549 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1966 transitions. Word has length 153 [2022-11-23 14:06:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:17,550 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1966 transitions. [2022-11-23 14:06:17,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-11-23 14:06:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1966 transitions. [2022-11-23 14:06:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-23 14:06:17,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:17,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:06:17,556 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash -341454776, now seen corresponding path program 1 times [2022-11-23 14:06:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:17,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592119094] [2022-11-23 14:06:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:17,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:17,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:17,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592119094] [2022-11-23 14:06:17,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592119094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:17,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:17,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:17,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688254078] [2022-11-23 14:06:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:17,802 INFO L87 Difference]: Start difference. First operand 1147 states and 1966 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-11-23 14:06:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:18,754 INFO L93 Difference]: Finished difference Result 3439 states and 5896 transitions. [2022-11-23 14:06:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 157 [2022-11-23 14:06:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:18,765 INFO L225 Difference]: With dead ends: 3439 [2022-11-23 14:06:18,765 INFO L226 Difference]: Without dead ends: 2293 [2022-11-23 14:06:18,767 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 [2022-11-23 14:06:18,768 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:18,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 48 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:06:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-11-23 14:06:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2022-11-23 14:06:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.6) internal successors, (3664), 2290 states have internal predecessors, (3664), 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) [2022-11-23 14:06:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3664 transitions. [2022-11-23 14:06:18,823 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3664 transitions. Word has length 157 [2022-11-23 14:06:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:18,824 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3664 transitions. [2022-11-23 14:06:18,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-11-23 14:06:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3664 transitions. [2022-11-23 14:06:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-23 14:06:18,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:18,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:18,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:06:18,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2139841565, now seen corresponding path program 1 times [2022-11-23 14:06:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583393862] [2022-11-23 14:06:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:19,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583393862] [2022-11-23 14:06:19,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583393862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:19,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:19,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:19,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50335098] [2022-11-23 14:06:19,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:19,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:19,275 INFO L87 Difference]: Start difference. First operand 2291 states and 3664 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2022-11-23 14:06:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:20,184 INFO L93 Difference]: Finished difference Result 6726 states and 10775 transitions. [2022-11-23 14:06:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 162 [2022-11-23 14:06:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:20,200 INFO L225 Difference]: With dead ends: 6726 [2022-11-23 14:06:20,201 INFO L226 Difference]: Without dead ends: 4436 [2022-11-23 14:06:20,204 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 [2022-11-23 14:06:20,205 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 128 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:20,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 78 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:06:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2022-11-23 14:06:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 4436. [2022-11-23 14:06:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.5028184892897407) internal successors, (6665), 4435 states have internal predecessors, (6665), 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) [2022-11-23 14:06:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6665 transitions. [2022-11-23 14:06:20,305 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6665 transitions. Word has length 162 [2022-11-23 14:06:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:20,305 INFO L495 AbstractCegarLoop]: Abstraction has 4436 states and 6665 transitions. [2022-11-23 14:06:20,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2022-11-23 14:06:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6665 transitions. [2022-11-23 14:06:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-23 14:06:20,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:20,314 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:06:20,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash 60825918, now seen corresponding path program 1 times [2022-11-23 14:06:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:20,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86683639] [2022-11-23 14:06:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:20,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:20,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86683639] [2022-11-23 14:06:20,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86683639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:20,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902032390] [2022-11-23 14:06:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:20,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:20,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:20,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:06:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:20,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:20,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:06:20,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:20,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902032390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:20,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:06:20,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:06:20,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056832348] [2022-11-23 14:06:20,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:20,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:20,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:20,955 INFO L87 Difference]: Start difference. First operand 4436 states and 6665 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2022-11-23 14:06:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:21,955 INFO L93 Difference]: Finished difference Result 12160 states and 18455 transitions. [2022-11-23 14:06:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:21,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2022-11-23 14:06:21,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:21,985 INFO L225 Difference]: With dead ends: 12160 [2022-11-23 14:06:21,985 INFO L226 Difference]: Without dead ends: 7868 [2022-11-23 14:06:21,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:21,997 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 147 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:21,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 267 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:06:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-11-23 14:06:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7868. [2022-11-23 14:06:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7868 states, 7867 states have (on average 1.3237574679039024) internal successors, (10414), 7867 states have internal predecessors, (10414), 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) [2022-11-23 14:06:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7868 states to 7868 states and 10414 transitions. [2022-11-23 14:06:22,262 INFO L78 Accepts]: Start accepts. Automaton has 7868 states and 10414 transitions. Word has length 167 [2022-11-23 14:06:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:22,262 INFO L495 AbstractCegarLoop]: Abstraction has 7868 states and 10414 transitions. [2022-11-23 14:06:22,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2022-11-23 14:06:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7868 states and 10414 transitions. [2022-11-23 14:06:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-23 14:06:22,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:22,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:22,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 14:06:22,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:22,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1281571523, now seen corresponding path program 1 times [2022-11-23 14:06:22,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:22,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317949528] [2022-11-23 14:06:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:22,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:22,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317949528] [2022-11-23 14:06:22,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317949528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:22,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:22,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117482893] [2022-11-23 14:06:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:22,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:22,711 INFO L87 Difference]: Start difference. First operand 7868 states and 10414 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-11-23 14:06:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:23,711 INFO L93 Difference]: Finished difference Result 20311 states and 26958 transitions. [2022-11-23 14:06:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:23,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 168 [2022-11-23 14:06:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:23,775 INFO L225 Difference]: With dead ends: 20311 [2022-11-23 14:06:23,775 INFO L226 Difference]: Without dead ends: 12587 [2022-11-23 14:06:23,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:23,785 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 153 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:23,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 62 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:06:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12587 states. [2022-11-23 14:06:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12587 to 12587. [2022-11-23 14:06:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12587 states, 12586 states have (on average 1.2886540600667409) internal successors, (16219), 12586 states have internal predecessors, (16219), 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) [2022-11-23 14:06:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12587 states to 12587 states and 16219 transitions. [2022-11-23 14:06:24,148 INFO L78 Accepts]: Start accepts. Automaton has 12587 states and 16219 transitions. Word has length 168 [2022-11-23 14:06:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:24,148 INFO L495 AbstractCegarLoop]: Abstraction has 12587 states and 16219 transitions. [2022-11-23 14:06:24,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-11-23 14:06:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 12587 states and 16219 transitions. [2022-11-23 14:06:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-23 14:06:24,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:24,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:24,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:06:24,165 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:24,165 INFO L85 PathProgramCache]: Analyzing trace with hash 715210842, now seen corresponding path program 1 times [2022-11-23 14:06:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:24,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181336987] [2022-11-23 14:06:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:24,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:24,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:24,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181336987] [2022-11-23 14:06:24,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181336987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:24,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886657148] [2022-11-23 14:06:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:24,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:24,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:24,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:24,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:06:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:24,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:06:24,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:24,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886657148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:24,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:06:24,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-23 14:06:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124895201] [2022-11-23 14:06:24,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:24,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:24,977 INFO L87 Difference]: Start difference. First operand 12587 states and 16219 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-11-23 14:06:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:26,065 INFO L93 Difference]: Finished difference Result 28748 states and 37995 transitions. [2022-11-23 14:06:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 [2022-11-23 14:06:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:26,102 INFO L225 Difference]: With dead ends: 28748 [2022-11-23 14:06:26,103 INFO L226 Difference]: Without dead ends: 16305 [2022-11-23 14:06:26,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:26,183 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 140 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:26,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 86 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:06:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16305 states. [2022-11-23 14:06:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16305 to 16305. [2022-11-23 14:06:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16305 states, 16304 states have (on average 1.259138861629048) internal successors, (20529), 16304 states have internal predecessors, (20529), 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) [2022-11-23 14:06:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16305 states to 16305 states and 20529 transitions. [2022-11-23 14:06:26,509 INFO L78 Accepts]: Start accepts. Automaton has 16305 states and 20529 transitions. Word has length 169 [2022-11-23 14:06:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:26,510 INFO L495 AbstractCegarLoop]: Abstraction has 16305 states and 20529 transitions. [2022-11-23 14:06:26,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-11-23 14:06:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 16305 states and 20529 transitions. [2022-11-23 14:06:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-23 14:06:26,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:26,527 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:26,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:26,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 14:06:26,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1442960082, now seen corresponding path program 1 times [2022-11-23 14:06:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:26,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682592894] [2022-11-23 14:06:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:27,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:27,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682592894] [2022-11-23 14:06:27,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682592894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:27,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:27,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:27,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000561643] [2022-11-23 14:06:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:27,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:27,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:27,074 INFO L87 Difference]: Start difference. First operand 16305 states and 20529 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 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) [2022-11-23 14:06:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:28,358 INFO L93 Difference]: Finished difference Result 53632 states and 67531 transitions. [2022-11-23 14:06:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 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 184 [2022-11-23 14:06:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:28,441 INFO L225 Difference]: With dead ends: 53632 [2022-11-23 14:06:28,442 INFO L226 Difference]: Without dead ends: 37614 [2022-11-23 14:06:28,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:28,465 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 566 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:28,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 283 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:06:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37614 states. [2022-11-23 14:06:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37614 to 37612. [2022-11-23 14:06:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37612 states, 37611 states have (on average 1.2572385738214884) internal successors, (47286), 37611 states have internal predecessors, (47286), 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) [2022-11-23 14:06:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37612 states to 37612 states and 47286 transitions. [2022-11-23 14:06:29,363 INFO L78 Accepts]: Start accepts. Automaton has 37612 states and 47286 transitions. Word has length 184 [2022-11-23 14:06:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:29,363 INFO L495 AbstractCegarLoop]: Abstraction has 37612 states and 47286 transitions. [2022-11-23 14:06:29,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 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) [2022-11-23 14:06:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 37612 states and 47286 transitions. [2022-11-23 14:06:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-23 14:06:29,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:29,397 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:29,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:06:29,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:29,403 INFO L85 PathProgramCache]: Analyzing trace with hash 350427102, now seen corresponding path program 1 times [2022-11-23 14:06:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:29,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669169672] [2022-11-23 14:06:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:06:29,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669169672] [2022-11-23 14:06:29,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669169672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897330896] [2022-11-23 14:06:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:29,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:29,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:29,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:29,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:06:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:30,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:30,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 14:06:30,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:30,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897330896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:30,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:06:30,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-23 14:06:30,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987337313] [2022-11-23 14:06:30,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:30,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:30,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:30,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:30,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:30,279 INFO L87 Difference]: Start difference. First operand 37612 states and 47286 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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) [2022-11-23 14:06:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:31,194 INFO L93 Difference]: Finished difference Result 74222 states and 93197 transitions. [2022-11-23 14:06:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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 199 [2022-11-23 14:06:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:31,265 INFO L225 Difference]: With dead ends: 74222 [2022-11-23 14:06:31,266 INFO L226 Difference]: Without dead ends: 36897 [2022-11-23 14:06:31,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:31,290 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:31,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:06:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36897 states. [2022-11-23 14:06:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36897 to 36897. [2022-11-23 14:06:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36897 states, 36896 states have (on average 1.2404596704249784) internal successors, (45768), 36896 states have internal predecessors, (45768), 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) [2022-11-23 14:06:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36897 states to 36897 states and 45768 transitions. [2022-11-23 14:06:32,227 INFO L78 Accepts]: Start accepts. Automaton has 36897 states and 45768 transitions. Word has length 199 [2022-11-23 14:06:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:32,229 INFO L495 AbstractCegarLoop]: Abstraction has 36897 states and 45768 transitions. [2022-11-23 14:06:32,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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) [2022-11-23 14:06:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36897 states and 45768 transitions. [2022-11-23 14:06:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-23 14:06:32,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:32,268 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:32,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:06:32,476 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2142208158, now seen corresponding path program 1 times [2022-11-23 14:06:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:32,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85235591] [2022-11-23 14:06:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:32,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:06:32,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:32,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85235591] [2022-11-23 14:06:32,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85235591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:32,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:32,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:32,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022051552] [2022-11-23 14:06:32,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:32,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:32,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:32,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:32,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:32,954 INFO L87 Difference]: Start difference. First operand 36897 states and 45768 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 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) [2022-11-23 14:06:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:35,037 INFO L93 Difference]: Finished difference Result 131569 states and 163076 transitions. [2022-11-23 14:06:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 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 210 [2022-11-23 14:06:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:35,210 INFO L225 Difference]: With dead ends: 131569 [2022-11-23 14:06:35,210 INFO L226 Difference]: Without dead ends: 94959 [2022-11-23 14:06:35,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:35,241 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 600 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:35,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 149 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:06:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94959 states. [2022-11-23 14:06:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94959 to 84230. [2022-11-23 14:06:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84230 states, 84229 states have (on average 1.2498426907597147) internal successors, (105273), 84229 states have internal predecessors, (105273), 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) [2022-11-23 14:06:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84230 states to 84230 states and 105273 transitions. [2022-11-23 14:06:37,308 INFO L78 Accepts]: Start accepts. Automaton has 84230 states and 105273 transitions. Word has length 210 [2022-11-23 14:06:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:37,309 INFO L495 AbstractCegarLoop]: Abstraction has 84230 states and 105273 transitions. [2022-11-23 14:06:37,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 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) [2022-11-23 14:06:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 84230 states and 105273 transitions. [2022-11-23 14:06:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-23 14:06:37,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:37,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:37,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:06:37,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:37,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1791329220, now seen corresponding path program 1 times [2022-11-23 14:06:37,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:37,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839428206] [2022-11-23 14:06:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:37,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:38,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839428206] [2022-11-23 14:06:38,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839428206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:38,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:38,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511413244] [2022-11-23 14:06:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:38,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:38,399 INFO L87 Difference]: Start difference. First operand 84230 states and 105273 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2022-11-23 14:06:39,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:39,666 INFO L93 Difference]: Finished difference Result 168602 states and 210719 transitions. [2022-11-23 14:06:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:39,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 217 [2022-11-23 14:06:39,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:39,805 INFO L225 Difference]: With dead ends: 168602 [2022-11-23 14:06:39,807 INFO L226 Difference]: Without dead ends: 84516 [2022-11-23 14:06:39,860 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 [2022-11-23 14:06:39,861 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:39,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 101 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:06:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84516 states. [2022-11-23 14:06:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84516 to 84516. [2022-11-23 14:06:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84516 states, 84515 states have (on average 1.2494350115364137) internal successors, (105596), 84515 states have internal predecessors, (105596), 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) [2022-11-23 14:06:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84516 states to 84516 states and 105596 transitions. [2022-11-23 14:06:41,568 INFO L78 Accepts]: Start accepts. Automaton has 84516 states and 105596 transitions. Word has length 217 [2022-11-23 14:06:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:41,569 INFO L495 AbstractCegarLoop]: Abstraction has 84516 states and 105596 transitions. [2022-11-23 14:06:41,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2022-11-23 14:06:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 84516 states and 105596 transitions. [2022-11-23 14:06:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-23 14:06:41,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:41,589 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:41,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:06:41,589 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:41,590 INFO L85 PathProgramCache]: Analyzing trace with hash 523167521, now seen corresponding path program 1 times [2022-11-23 14:06:41,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:41,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122938270] [2022-11-23 14:06:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:41,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:06:42,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:42,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122938270] [2022-11-23 14:06:42,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122938270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:42,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705423039] [2022-11-23 14:06:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:42,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:42,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:06:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-23 14:06:42,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:42,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705423039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:42,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:06:42,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-23 14:06:42,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440625119] [2022-11-23 14:06:42,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:42,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:42,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:42,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:42,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:42,914 INFO L87 Difference]: Start difference. First operand 84516 states and 105596 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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) [2022-11-23 14:06:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:44,487 INFO L93 Difference]: Finished difference Result 202350 states and 255129 transitions. [2022-11-23 14:06:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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 232 [2022-11-23 14:06:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:44,671 INFO L225 Difference]: With dead ends: 202350 [2022-11-23 14:06:44,671 INFO L226 Difference]: Without dead ends: 118264 [2022-11-23 14:06:44,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:44,723 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:44,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:06:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118264 states. [2022-11-23 14:06:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118264 to 118264. [2022-11-23 14:06:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118264 states, 118263 states have (on average 1.2391703237699028) internal successors, (146548), 118263 states have internal predecessors, (146548), 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) [2022-11-23 14:06:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118264 states to 118264 states and 146548 transitions. [2022-11-23 14:06:47,218 INFO L78 Accepts]: Start accepts. Automaton has 118264 states and 146548 transitions. Word has length 232 [2022-11-23 14:06:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:47,218 INFO L495 AbstractCegarLoop]: Abstraction has 118264 states and 146548 transitions. [2022-11-23 14:06:47,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 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) [2022-11-23 14:06:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 118264 states and 146548 transitions. [2022-11-23 14:06:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-23 14:06:47,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:47,243 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:47,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:47,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:47,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1077315049, now seen corresponding path program 1 times [2022-11-23 14:06:47,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392931560] [2022-11-23 14:06:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-23 14:06:48,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:48,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392931560] [2022-11-23 14:06:48,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392931560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:48,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161426734] [2022-11-23 14:06:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:48,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:48,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:48,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:48,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:06:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:48,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:48,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:06:48,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:48,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161426734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:48,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:06:48,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 14:06:48,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461176392] [2022-11-23 14:06:48,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:48,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:48,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:48,616 INFO L87 Difference]: Start difference. First operand 118264 states and 146548 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-11-23 14:06:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:50,445 INFO L93 Difference]: Finished difference Result 249397 states and 309083 transitions. [2022-11-23 14:06:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:50,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 249 [2022-11-23 14:06:50,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:50,627 INFO L225 Difference]: With dead ends: 249397 [2022-11-23 14:06:50,627 INFO L226 Difference]: Without dead ends: 131563 [2022-11-23 14:06:50,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:50,683 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 135 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:50,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 213 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:06:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131563 states. [2022-11-23 14:06:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131563 to 131134. [2022-11-23 14:06:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131134 states, 131133 states have (on average 1.2034041774381734) internal successors, (157806), 131133 states have internal predecessors, (157806), 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) [2022-11-23 14:06:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131134 states to 131134 states and 157806 transitions. [2022-11-23 14:06:53,001 INFO L78 Accepts]: Start accepts. Automaton has 131134 states and 157806 transitions. Word has length 249 [2022-11-23 14:06:53,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:53,001 INFO L495 AbstractCegarLoop]: Abstraction has 131134 states and 157806 transitions. [2022-11-23 14:06:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-11-23 14:06:53,002 INFO L276 IsEmpty]: Start isEmpty. Operand 131134 states and 157806 transitions. [2022-11-23 14:06:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-23 14:06:53,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:53,028 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:53,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:06:53,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:06:53,234 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:53,234 INFO L85 PathProgramCache]: Analyzing trace with hash -525933747, now seen corresponding path program 1 times [2022-11-23 14:06:53,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:53,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407972736] [2022-11-23 14:06:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:53,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-23 14:06:54,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:54,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407972736] [2022-11-23 14:06:54,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407972736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:54,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16537896] [2022-11-23 14:06:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:54,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:54,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:54,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:06:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:54,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:06:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-23 14:06:54,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:54,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16537896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:54,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:06:54,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 14:06:54,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365120037] [2022-11-23 14:06:54,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:54,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:54,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:54,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:06:54,606 INFO L87 Difference]: Start difference. First operand 131134 states and 157806 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2022-11-23 14:06:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:57,354 INFO L93 Difference]: Finished difference Result 384677 states and 460412 transitions. [2022-11-23 14:06:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 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 253 [2022-11-23 14:06:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:57,709 INFO L225 Difference]: With dead ends: 384677 [2022-11-23 14:06:57,709 INFO L226 Difference]: Without dead ends: 253973 [2022-11-23 14:06:58,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:06:58,229 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 388 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:58,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 213 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:06:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253973 states. [2022-11-23 14:07:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253973 to 253113. [2022-11-23 14:07:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253113 states, 253112 states have (on average 1.1917846644963495) internal successors, (301655), 253112 states have internal predecessors, (301655), 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) [2022-11-23 14:07:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253113 states to 253113 states and 301655 transitions. [2022-11-23 14:07:03,230 INFO L78 Accepts]: Start accepts. Automaton has 253113 states and 301655 transitions. Word has length 253 [2022-11-23 14:07:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:03,230 INFO L495 AbstractCegarLoop]: Abstraction has 253113 states and 301655 transitions. [2022-11-23 14:07:03,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2022-11-23 14:07:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 253113 states and 301655 transitions. [2022-11-23 14:07:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-11-23 14:07:03,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:03,252 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:03,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:03,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:07:03,459 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2088313230, now seen corresponding path program 1 times [2022-11-23 14:07:03,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:03,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026514840] [2022-11-23 14:07:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:03,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-23 14:07:03,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:03,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026514840] [2022-11-23 14:07:03,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026514840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:03,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315133809] [2022-11-23 14:07:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:03,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:03,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:03,910 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:03,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccea35d8-c7d3-4eba-9b5c-1991b8a86fab/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:07:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:07:04,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-23 14:07:04,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:04,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315133809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:04,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:07:04,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 14:07:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336467374] [2022-11-23 14:07:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:04,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:04,194 INFO L87 Difference]: Start difference. First operand 253113 states and 301655 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2022-11-23 14:07:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:07,419 INFO L93 Difference]: Finished difference Result 503794 states and 599374 transitions. [2022-11-23 14:07:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 256 [2022-11-23 14:07:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:07,887 INFO L225 Difference]: With dead ends: 503794 [2022-11-23 14:07:07,888 INFO L226 Difference]: Without dead ends: 251111 [2022-11-23 14:07:07,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:07,991 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 133 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:07,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 236 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:07:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251111 states. [2022-11-23 14:07:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251111 to 247679. [2022-11-23 14:07:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247679 states, 247678 states have (on average 1.1781425883606942) internal successors, (291800), 247678 states have internal predecessors, (291800), 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)