./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.07.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.07.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur --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 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f --- 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-38b53e6 [2022-11-26 00:34:56,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:34:56,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:34:56,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:34:56,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:34:56,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:34:56,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:34:56,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:34:56,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:34:56,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:34:56,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:34:56,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:34:56,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:34:56,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:34:56,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:34:56,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:34:56,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:34:56,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:34:56,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:34:56,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:34:56,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:34:56,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:34:56,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:34:56,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:34:56,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:34:56,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:34:56,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:34:56,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:34:56,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:34:56,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:34:56,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:34:56,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:34:56,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:34:56,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:34:56,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:34:56,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:34:56,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:34:56,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:34:56,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:34:56,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:34:56,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:34:56,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:34:56,293 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:34:56,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:34:56,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:34:56,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:34:56,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:34:56,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:34:56,295 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:34:56,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:34:56,296 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:34:56,296 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:34:56,296 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:34:56,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:34:56,297 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:34:56,297 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:34:56,297 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:34:56,297 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:34:56,298 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:34:56,298 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:34:56,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:34:56,299 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:34:56,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:34:56,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:34:56,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:34:56,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:34:56,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:34:56,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:34:56,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:34:56,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:34:56,301 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:34:56,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:34:56,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:34:56,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:34:56,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:34:56,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:34:56,303 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:34:56,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:34:56,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:34:56,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:34:56,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:34:56,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:34:56,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:34:56,304 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_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f [2022-11-26 00:34:56,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:34:56,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:34:56,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:34:56,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:34:56,643 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:34:56,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/systemc/transmitter.07.cil.c [2022-11-26 00:34:59,780 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:35:00,000 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:35:00,000 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/sv-benchmarks/c/systemc/transmitter.07.cil.c [2022-11-26 00:35:00,012 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/data/49de4e643/f15e95af9e3a44ed858a4392b11dadc9/FLAGecb7a60a1 [2022-11-26 00:35:00,029 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/data/49de4e643/f15e95af9e3a44ed858a4392b11dadc9 [2022-11-26 00:35:00,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:35:00,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:35:00,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:35:00,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:35:00,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:35:00,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc09034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00, skipping insertion in model container [2022-11-26 00:35:00,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:35:00,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:35:00,311 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_d386a386-8567-4620-b183-b4d948273e8d/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2022-11-26 00:35:00,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:35:00,411 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:35:00,422 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_d386a386-8567-4620-b183-b4d948273e8d/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2022-11-26 00:35:00,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:35:00,502 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:35:00,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00 WrapperNode [2022-11-26 00:35:00,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:35:00,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:35:00,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:35:00,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:35:00,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,577 INFO L138 Inliner]: procedures = 42, calls = 51, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 549 [2022-11-26 00:35:00,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:35:00,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:35:00,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:35:00,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:35:00,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,636 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:35:00,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:35:00,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:35:00,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:35:00,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (1/1) ... [2022-11-26 00:35:00,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:35:00,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:00,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:35:00,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d386a386-8567-4620-b183-b4d948273e8d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:35:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:35:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-26 00:35:00,739 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-26 00:35:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-26 00:35:00,739 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-26 00:35:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-26 00:35:00,740 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-26 00:35:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-26 00:35:00,740 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-26 00:35:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-26 00:35:00,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-26 00:35:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:35:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-26 00:35:00,741 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-26 00:35:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:35:00,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:35:00,877 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:35:00,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:35:01,653 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:35:02,018 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:35:02,019 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-26 00:35:02,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:35:02 BoogieIcfgContainer [2022-11-26 00:35:02,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:35:02,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:35:02,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:35:02,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:35:02,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:35:00" (1/3) ... [2022-11-26 00:35:02,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de0011a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:35:02, skipping insertion in model container [2022-11-26 00:35:02,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:35:00" (2/3) ... [2022-11-26 00:35:02,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de0011a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:35:02, skipping insertion in model container [2022-11-26 00:35:02,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:35:02" (3/3) ... [2022-11-26 00:35:02,039 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.07.cil.c [2022-11-26 00:35:02,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:35:02,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:35:02,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:35:02,138 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;@3967dd6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:35:02,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:35:02,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 105 states have internal predecessors, (159), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-26 00:35:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:35:02,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:02,156 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] [2022-11-26 00:35:02,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1870750755, now seen corresponding path program 1 times [2022-11-26 00:35:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:02,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644015600] [2022-11-26 00:35:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:02,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:35:02,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:02,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644015600] [2022-11-26 00:35:02,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644015600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:02,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:02,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:35:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763305197] [2022-11-26 00:35:02,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:02,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:35:02,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:35:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:35:02,713 INFO L87 Difference]: Start difference. First operand has 131 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 105 states have internal predecessors, (159), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:03,223 INFO L93 Difference]: Finished difference Result 376 states and 589 transitions. [2022-11-26 00:35:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:35:03,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-11-26 00:35:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:03,242 INFO L225 Difference]: With dead ends: 376 [2022-11-26 00:35:03,243 INFO L226 Difference]: Without dead ends: 246 [2022-11-26 00:35:03,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:35:03,256 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 334 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:03,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 518 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:35:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-26 00:35:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2022-11-26 00:35:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 195 states have (on average 1.476923076923077) internal successors, (288), 196 states have internal predecessors, (288), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-26 00:35:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-11-26 00:35:03,339 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 57 [2022-11-26 00:35:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:03,340 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-11-26 00:35:03,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-11-26 00:35:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:35:03,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:03,343 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] [2022-11-26 00:35:03,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:35:03,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash 530774366, now seen corresponding path program 1 times [2022-11-26 00:35:03,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:03,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868717744] [2022-11-26 00:35:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:03,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:35:03,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:03,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868717744] [2022-11-26 00:35:03,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868717744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:03,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:03,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:35:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575615641] [2022-11-26 00:35:03,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:03,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:35:03,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:03,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:35:03,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:35:03,580 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:04,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:04,168 INFO L93 Difference]: Finished difference Result 825 states and 1227 transitions. [2022-11-26 00:35:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:35:04,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-11-26 00:35:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:04,179 INFO L225 Difference]: With dead ends: 825 [2022-11-26 00:35:04,179 INFO L226 Difference]: Without dead ends: 566 [2022-11-26 00:35:04,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:35:04,189 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 680 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:04,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 828 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:35:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-26 00:35:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 554. [2022-11-26 00:35:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 457 states have (on average 1.4704595185995624) internal successors, (672), 452 states have internal predecessors, (672), 68 states have call successors, (68), 26 states have call predecessors, (68), 28 states have return successors, (76), 76 states have call predecessors, (76), 68 states have call successors, (76) [2022-11-26 00:35:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 816 transitions. [2022-11-26 00:35:04,274 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 816 transitions. Word has length 57 [2022-11-26 00:35:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:04,274 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 816 transitions. [2022-11-26 00:35:04,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 816 transitions. [2022-11-26 00:35:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:35:04,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:04,277 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] [2022-11-26 00:35:04,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:35:04,277 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 45599647, now seen corresponding path program 1 times [2022-11-26 00:35:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:04,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536732948] [2022-11-26 00:35:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:35:04,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536732948] [2022-11-26 00:35:04,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536732948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:04,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:04,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:35:04,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291180719] [2022-11-26 00:35:04,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:04,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:35:04,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:04,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:35:04,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:35:04,407 INFO L87 Difference]: Start difference. First operand 554 states and 816 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:04,994 INFO L93 Difference]: Finished difference Result 1925 states and 2870 transitions. [2022-11-26 00:35:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:35:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-11-26 00:35:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:05,003 INFO L225 Difference]: With dead ends: 1925 [2022-11-26 00:35:05,003 INFO L226 Difference]: Without dead ends: 1337 [2022-11-26 00:35:05,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:35:05,013 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 680 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:05,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 809 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:35:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-11-26 00:35:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1045. [2022-11-26 00:35:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 864 states have (on average 1.4699074074074074) internal successors, (1270), 860 states have internal predecessors, (1270), 124 states have call successors, (124), 50 states have call predecessors, (124), 56 states have return successors, (147), 135 states have call predecessors, (147), 124 states have call successors, (147) [2022-11-26 00:35:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1541 transitions. [2022-11-26 00:35:05,136 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1541 transitions. Word has length 57 [2022-11-26 00:35:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:05,137 INFO L495 AbstractCegarLoop]: Abstraction has 1045 states and 1541 transitions. [2022-11-26 00:35:05,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1541 transitions. [2022-11-26 00:35:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:35:05,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:05,139 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] [2022-11-26 00:35:05,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:35:05,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash 568920318, now seen corresponding path program 1 times [2022-11-26 00:35:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:05,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246437372] [2022-11-26 00:35:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:05,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:35:05,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:05,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246437372] [2022-11-26 00:35:05,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246437372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:05,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:05,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:35:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950936966] [2022-11-26 00:35:05,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:35:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:35:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:35:05,255 INFO L87 Difference]: Start difference. First operand 1045 states and 1541 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:05,902 INFO L93 Difference]: Finished difference Result 3566 states and 5337 transitions. [2022-11-26 00:35:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:35:05,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-11-26 00:35:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:05,918 INFO L225 Difference]: With dead ends: 3566 [2022-11-26 00:35:05,918 INFO L226 Difference]: Without dead ends: 2452 [2022-11-26 00:35:05,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:35:05,923 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 680 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:05,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 680 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:35:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-11-26 00:35:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2001. [2022-11-26 00:35:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 1656 states have (on average 1.4673913043478262) internal successors, (2430), 1656 states have internal predecessors, (2430), 232 states have call successors, (232), 98 states have call predecessors, (232), 112 states have return successors, (283), 247 states have call predecessors, (283), 232 states have call successors, (283) [2022-11-26 00:35:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2945 transitions. [2022-11-26 00:35:06,091 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2945 transitions. Word has length 57 [2022-11-26 00:35:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:06,091 INFO L495 AbstractCegarLoop]: Abstraction has 2001 states and 2945 transitions. [2022-11-26 00:35:06,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2945 transitions. [2022-11-26 00:35:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:35:06,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:06,093 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] [2022-11-26 00:35:06,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:35:06,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:06,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1487894941, now seen corresponding path program 1 times [2022-11-26 00:35:06,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:06,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239720920] [2022-11-26 00:35:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:06,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:35:06,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:06,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239720920] [2022-11-26 00:35:06,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239720920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:06,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:06,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:35:06,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355488848] [2022-11-26 00:35:06,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:06,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:35:06,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:35:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:35:06,216 INFO L87 Difference]: Start difference. First operand 2001 states and 2945 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:07,017 INFO L93 Difference]: Finished difference Result 6728 states and 10091 transitions. [2022-11-26 00:35:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:35:07,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-11-26 00:35:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:07,040 INFO L225 Difference]: With dead ends: 6728 [2022-11-26 00:35:07,041 INFO L226 Difference]: Without dead ends: 4590 [2022-11-26 00:35:07,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:35:07,049 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 682 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:07,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 681 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:35:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2022-11-26 00:35:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 3889. [2022-11-26 00:35:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3208 states have (on average 1.4607231920199502) internal successors, (4686), 3216 states have internal predecessors, (4686), 456 states have call successors, (456), 194 states have call predecessors, (456), 224 states have return successors, (567), 479 states have call predecessors, (567), 456 states have call successors, (567) [2022-11-26 00:35:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 5709 transitions. [2022-11-26 00:35:07,386 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 5709 transitions. Word has length 57 [2022-11-26 00:35:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:07,388 INFO L495 AbstractCegarLoop]: Abstraction has 3889 states and 5709 transitions. [2022-11-26 00:35:07,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 5709 transitions. [2022-11-26 00:35:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:35:07,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:07,393 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:35:07,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:35:07,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:07,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2137262399, now seen corresponding path program 1 times [2022-11-26 00:35:07,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:07,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674726631] [2022-11-26 00:35:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:35:07,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:07,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674726631] [2022-11-26 00:35:07,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674726631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:07,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:07,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:35:07,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107275250] [2022-11-26 00:35:07,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:07,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:35:07,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:35:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:35:07,725 INFO L87 Difference]: Start difference. First operand 3889 states and 5709 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:08,571 INFO L93 Difference]: Finished difference Result 11946 states and 17635 transitions. [2022-11-26 00:35:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:35:08,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 74 [2022-11-26 00:35:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:08,615 INFO L225 Difference]: With dead ends: 11946 [2022-11-26 00:35:08,615 INFO L226 Difference]: Without dead ends: 8063 [2022-11-26 00:35:08,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:35:08,629 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 680 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:08,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 461 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:35:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8063 states. [2022-11-26 00:35:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8063 to 6503. [2022-11-26 00:35:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6503 states, 5426 states have (on average 1.4472908219683007) internal successors, (7853), 5441 states have internal predecessors, (7853), 692 states have call successors, (692), 324 states have call predecessors, (692), 384 states have return successors, (914), 738 states have call predecessors, (914), 692 states have call successors, (914) [2022-11-26 00:35:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 9459 transitions. [2022-11-26 00:35:09,185 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 9459 transitions. Word has length 74 [2022-11-26 00:35:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:09,186 INFO L495 AbstractCegarLoop]: Abstraction has 6503 states and 9459 transitions. [2022-11-26 00:35:09,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 9459 transitions. [2022-11-26 00:35:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 00:35:09,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:09,190 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:35:09,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:35:09,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash -128449713, now seen corresponding path program 1 times [2022-11-26 00:35:09,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:09,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780145779] [2022-11-26 00:35:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:35:09,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780145779] [2022-11-26 00:35:09,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780145779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:09,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:09,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:35:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060055271] [2022-11-26 00:35:09,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:35:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:35:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:35:09,427 INFO L87 Difference]: Start difference. First operand 6503 states and 9459 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:10,977 INFO L93 Difference]: Finished difference Result 23659 states and 34568 transitions. [2022-11-26 00:35:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:35:10,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 76 [2022-11-26 00:35:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:11,076 INFO L225 Difference]: With dead ends: 23659 [2022-11-26 00:35:11,076 INFO L226 Difference]: Without dead ends: 17162 [2022-11-26 00:35:11,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:35:11,152 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 663 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:11,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 511 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:35:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17162 states. [2022-11-26 00:35:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17162 to 12700. [2022-11-26 00:35:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12700 states, 10599 states have (on average 1.4392867251627512) internal successors, (15255), 10630 states have internal predecessors, (15255), 1332 states have call successors, (1332), 648 states have call predecessors, (1332), 768 states have return successors, (1746), 1422 states have call predecessors, (1746), 1332 states have call successors, (1746) [2022-11-26 00:35:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12700 states to 12700 states and 18333 transitions. [2022-11-26 00:35:12,595 INFO L78 Accepts]: Start accepts. Automaton has 12700 states and 18333 transitions. Word has length 76 [2022-11-26 00:35:12,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:12,596 INFO L495 AbstractCegarLoop]: Abstraction has 12700 states and 18333 transitions. [2022-11-26 00:35:12,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 12700 states and 18333 transitions. [2022-11-26 00:35:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 00:35:12,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:12,603 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] [2022-11-26 00:35:12,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:35:12,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1364751073, now seen corresponding path program 1 times [2022-11-26 00:35:12,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:12,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190366478] [2022-11-26 00:35:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:12,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:35:12,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190366478] [2022-11-26 00:35:12,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190366478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:12,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:12,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:35:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400072903] [2022-11-26 00:35:12,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:12,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:35:12,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:35:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:35:12,818 INFO L87 Difference]: Start difference. First operand 12700 states and 18333 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:14,672 INFO L93 Difference]: Finished difference Result 35860 states and 52089 transitions. [2022-11-26 00:35:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:35:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 78 [2022-11-26 00:35:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:14,787 INFO L225 Difference]: With dead ends: 35860 [2022-11-26 00:35:14,787 INFO L226 Difference]: Without dead ends: 23166 [2022-11-26 00:35:14,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:35:14,826 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 574 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:14,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 581 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:35:14,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23166 states. [2022-11-26 00:35:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23166 to 18788. [2022-11-26 00:35:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18788 states, 15655 states have (on average 1.4320664324496966) internal successors, (22419), 15688 states have internal predecessors, (22419), 1980 states have call successors, (1980), 976 states have call predecessors, (1980), 1152 states have return successors, (2572), 2124 states have call predecessors, (2572), 1980 states have call successors, (2572) [2022-11-26 00:35:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18788 states to 18788 states and 26971 transitions. [2022-11-26 00:35:17,038 INFO L78 Accepts]: Start accepts. Automaton has 18788 states and 26971 transitions. Word has length 78 [2022-11-26 00:35:17,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:17,039 INFO L495 AbstractCegarLoop]: Abstraction has 18788 states and 26971 transitions. [2022-11-26 00:35:17,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 18788 states and 26971 transitions. [2022-11-26 00:35:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:35:17,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:17,052 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:35:17,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:35:17,052 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1247671593, now seen corresponding path program 1 times [2022-11-26 00:35:17,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:17,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715295894] [2022-11-26 00:35:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:17,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:35:17,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:17,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715295894] [2022-11-26 00:35:17,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715295894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:17,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:17,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:35:17,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580774194] [2022-11-26 00:35:17,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:17,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:35:17,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:35:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:35:17,282 INFO L87 Difference]: Start difference. First operand 18788 states and 26971 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:19,830 INFO L93 Difference]: Finished difference Result 46656 states and 66893 transitions. [2022-11-26 00:35:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:35:19,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 80 [2022-11-26 00:35:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:19,960 INFO L225 Difference]: With dead ends: 46656 [2022-11-26 00:35:19,960 INFO L226 Difference]: Without dead ends: 27874 [2022-11-26 00:35:20,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:35:20,017 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 499 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:20,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 446 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:35:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27874 states. [2022-11-26 00:35:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27874 to 27872. [2022-11-26 00:35:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27872 states, 23195 states have (on average 1.4245742616943307) internal successors, (33043), 23220 states have internal predecessors, (33043), 2948 states have call successors, (2948), 1472 states have call predecessors, (2948), 1728 states have return successors, (3788), 3180 states have call predecessors, (3788), 2948 states have call successors, (3788) [2022-11-26 00:35:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27872 states to 27872 states and 39779 transitions. [2022-11-26 00:35:22,723 INFO L78 Accepts]: Start accepts. Automaton has 27872 states and 39779 transitions. Word has length 80 [2022-11-26 00:35:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:22,724 INFO L495 AbstractCegarLoop]: Abstraction has 27872 states and 39779 transitions. [2022-11-26 00:35:22,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 27872 states and 39779 transitions. [2022-11-26 00:35:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:35:22,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:22,732 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:35:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:35:22,733 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash 785546593, now seen corresponding path program 1 times [2022-11-26 00:35:22,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:22,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801906491] [2022-11-26 00:35:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:22,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:35:22,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:22,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801906491] [2022-11-26 00:35:22,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801906491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:22,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:22,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:35:22,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618491114] [2022-11-26 00:35:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:22,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:35:22,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:35:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:35:22,974 INFO L87 Difference]: Start difference. First operand 27872 states and 39779 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:27,293 INFO L93 Difference]: Finished difference Result 74218 states and 106645 transitions. [2022-11-26 00:35:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:35:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2022-11-26 00:35:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:27,484 INFO L225 Difference]: With dead ends: 74218 [2022-11-26 00:35:27,485 INFO L226 Difference]: Without dead ends: 46352 [2022-11-26 00:35:27,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:35:27,548 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 524 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:27,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 536 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:35:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46352 states. [2022-11-26 00:35:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46352 to 41566. [2022-11-26 00:35:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41566 states, 34575 states have (on average 1.417006507592191) internal successors, (48993), 34568 states have internal predecessors, (48993), 4398 states have call successors, (4398), 2224 states have call predecessors, (4398), 2592 states have return successors, (5578), 4774 states have call predecessors, (5578), 4398 states have call successors, (5578) [2022-11-26 00:35:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41566 states to 41566 states and 58969 transitions. [2022-11-26 00:35:31,388 INFO L78 Accepts]: Start accepts. Automaton has 41566 states and 58969 transitions. Word has length 82 [2022-11-26 00:35:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:31,389 INFO L495 AbstractCegarLoop]: Abstraction has 41566 states and 58969 transitions. [2022-11-26 00:35:31,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 41566 states and 58969 transitions. [2022-11-26 00:35:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-26 00:35:31,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:31,404 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:31,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:35:31,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:31,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:31,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1390026839, now seen corresponding path program 1 times [2022-11-26 00:35:31,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:31,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70379020] [2022-11-26 00:35:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:31,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:35:31,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70379020] [2022-11-26 00:35:31,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70379020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:35:31,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:35:31,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:35:31,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728840955] [2022-11-26 00:35:31,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:35:31,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:35:31,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:31,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:35:31,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:35:31,696 INFO L87 Difference]: Start difference. First operand 41566 states and 58969 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:35:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:39,357 INFO L93 Difference]: Finished difference Result 130646 states and 186342 transitions. [2022-11-26 00:35:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:35:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2022-11-26 00:35:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:39,727 INFO L225 Difference]: With dead ends: 130646 [2022-11-26 00:35:39,727 INFO L226 Difference]: Without dead ends: 89086 [2022-11-26 00:35:39,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:35:39,832 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 527 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:39,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 405 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:35:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89086 states.