./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0 --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 b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 --- 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-e04fb08 [2022-11-16 20:10:16,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:10:16,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:10:16,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:10:16,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:10:16,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:10:16,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:10:16,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:10:16,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:10:16,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:10:16,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:10:16,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:10:16,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:10:16,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:10:16,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:10:16,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:10:16,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:10:16,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:10:16,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:10:16,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:10:16,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:10:16,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:10:16,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:10:16,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:10:16,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:10:16,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:10:16,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:10:16,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:10:16,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:10:16,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:10:16,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:10:16,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:10:16,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:10:16,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:10:16,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:10:16,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:10:16,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:10:16,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:10:16,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:10:16,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:10:16,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:10:16,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:10:16,251 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:10:16,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:10:16,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:10:16,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:10:16,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:10:16,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:10:16,258 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:10:16,258 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:10:16,259 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:10:16,259 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:10:16,260 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:10:16,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:10:16,260 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:10:16,261 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:10:16,261 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:10:16,261 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:10:16,261 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:10:16,262 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:10:16,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:10:16,263 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:10:16,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:10:16,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:10:16,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:10:16,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:10:16,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:10:16,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:10:16,264 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:10:16,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:10:16,266 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:10:16,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:10:16,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:10:16,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:10:16,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:10:16,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:10:16,267 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:10:16,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:10:16,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:10:16,268 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:10:16,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:10:16,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:10:16,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:10:16,270 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_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 [2022-11-16 20:10:16,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:10:16,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:10:16,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:10:16,602 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:10:16,602 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:10:16,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-16 20:10:16,679 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/data/b3619ccd2/3b9c54fac8a54cef9f041a9de06c0b0e/FLAG36b7a17c9 [2022-11-16 20:10:17,303 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:10:17,304 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-16 20:10:17,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/data/b3619ccd2/3b9c54fac8a54cef9f041a9de06c0b0e/FLAG36b7a17c9 [2022-11-16 20:10:17,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/data/b3619ccd2/3b9c54fac8a54cef9f041a9de06c0b0e [2022-11-16 20:10:17,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:10:17,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:10:17,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:10:17,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:10:17,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:10:17,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:10:17" (1/1) ... [2022-11-16 20:10:17,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8cffc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:17, skipping insertion in model container [2022-11-16 20:10:17,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:10:17" (1/1) ... [2022-11-16 20:10:17,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:10:17,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:10:17,887 WARN L229 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_5363de7f-5cc0-4672-98e6-6bd3e3004489/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2022-11-16 20:10:17,978 WARN L229 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_5363de7f-5cc0-4672-98e6-6bd3e3004489/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2022-11-16 20:10:18,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:10:18,144 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:10:18,163 WARN L229 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_5363de7f-5cc0-4672-98e6-6bd3e3004489/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2022-11-16 20:10:18,195 WARN L229 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_5363de7f-5cc0-4672-98e6-6bd3e3004489/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2022-11-16 20:10:18,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:10:18,246 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:10:18,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18 WrapperNode [2022-11-16 20:10:18,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:10:18,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:10:18,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:10:18,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:10:18,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,353 INFO L138 Inliner]: procedures = 67, calls = 78, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 750 [2022-11-16 20:10:18,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:10:18,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:10:18,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:10:18,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:10:18,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,425 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:10:18,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:10:18,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:10:18,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:10:18,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (1/1) ... [2022-11-16 20:10:18,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:10:18,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:18,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:10:18,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:10:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:10:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 20:10:18,527 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 20:10:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-16 20:10:18,528 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-16 20:10:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 20:10:18,528 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 20:10:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 20:10:18,528 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 20:10:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-16 20:10:18,529 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-16 20:10:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 20:10:18,529 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 20:10:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 20:10:18,529 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 20:10:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-16 20:10:18,529 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-16 20:10:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-16 20:10:18,530 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-16 20:10:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-16 20:10:18,530 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-16 20:10:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 20:10:18,530 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 20:10:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:10:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 20:10:18,531 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 20:10:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-16 20:10:18,531 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-16 20:10:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:10:18,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:10:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 20:10:18,532 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 20:10:18,716 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:10:18,718 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:10:19,584 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:10:20,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:10:20,154 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-16 20:10:20,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:10:20 BoogieIcfgContainer [2022-11-16 20:10:20,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:10:20,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:10:20,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:10:20,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:10:20,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:10:17" (1/3) ... [2022-11-16 20:10:20,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cadf614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:10:20, skipping insertion in model container [2022-11-16 20:10:20,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:18" (2/3) ... [2022-11-16 20:10:20,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cadf614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:10:20, skipping insertion in model container [2022-11-16 20:10:20,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:10:20" (3/3) ... [2022-11-16 20:10:20,175 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-16 20:10:20,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:10:20,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 20:10:20,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:10:20,305 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;@403a7b07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:10:20,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 20:10:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 153 states have (on average 1.522875816993464) internal successors, (233), 159 states have internal predecessors, (233), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-16 20:10:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 20:10:20,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:20,328 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] [2022-11-16 20:10:20,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -828462110, now seen corresponding path program 1 times [2022-11-16 20:10:20,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:20,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835866476] [2022-11-16 20:10:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:20,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:20,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835866476] [2022-11-16 20:10:20,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835866476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:20,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:20,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:10:20,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419714777] [2022-11-16 20:10:20,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:20,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:10:20,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:10:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:10:20,811 INFO L87 Difference]: Start difference. First operand has 205 states, 153 states have (on average 1.522875816993464) internal successors, (233), 159 states have internal predecessors, (233), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:10:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:22,059 INFO L93 Difference]: Finished difference Result 830 states and 1204 transitions. [2022-11-16 20:10:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:10:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-16 20:10:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:22,091 INFO L225 Difference]: With dead ends: 830 [2022-11-16 20:10:22,091 INFO L226 Difference]: Without dead ends: 611 [2022-11-16 20:10:22,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:10:22,111 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 909 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:22,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1014 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 20:10:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-16 20:10:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 540. [2022-11-16 20:10:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 387 states have (on average 1.3385012919896642) internal successors, (518), 391 states have internal predecessors, (518), 90 states have call successors, (90), 62 states have call predecessors, (90), 61 states have return successors, (103), 88 states have call predecessors, (103), 88 states have call successors, (103) [2022-11-16 20:10:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 711 transitions. [2022-11-16 20:10:22,251 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 711 transitions. Word has length 45 [2022-11-16 20:10:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:22,252 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 711 transitions. [2022-11-16 20:10:22,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:10:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 711 transitions. [2022-11-16 20:10:22,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 20:10:22,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:22,256 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] [2022-11-16 20:10:22,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:10:22,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2107454651, now seen corresponding path program 1 times [2022-11-16 20:10:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:22,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873725981] [2022-11-16 20:10:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:22,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:22,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873725981] [2022-11-16 20:10:22,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873725981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:22,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:22,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 20:10:22,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836756289] [2022-11-16 20:10:22,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:22,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:10:22,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:10:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:10:22,617 INFO L87 Difference]: Start difference. First operand 540 states and 711 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 20:10:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:23,512 INFO L93 Difference]: Finished difference Result 1301 states and 1658 transitions. [2022-11-16 20:10:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:10:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-16 20:10:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:23,520 INFO L225 Difference]: With dead ends: 1301 [2022-11-16 20:10:23,520 INFO L226 Difference]: Without dead ends: 898 [2022-11-16 20:10:23,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:10:23,523 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 426 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:23,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 851 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:10:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-16 20:10:23,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 869. [2022-11-16 20:10:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 610 states have (on average 1.2934426229508196) internal successors, (789), 615 states have internal predecessors, (789), 146 states have call successors, (146), 110 states have call predecessors, (146), 111 states have return successors, (177), 145 states have call predecessors, (177), 144 states have call successors, (177) [2022-11-16 20:10:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1112 transitions. [2022-11-16 20:10:23,635 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1112 transitions. Word has length 46 [2022-11-16 20:10:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:23,635 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1112 transitions. [2022-11-16 20:10:23,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 20:10:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1112 transitions. [2022-11-16 20:10:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 20:10:23,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:23,638 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] [2022-11-16 20:10:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:10:23,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -223685774, now seen corresponding path program 1 times [2022-11-16 20:10:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762579746] [2022-11-16 20:10:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:23,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762579746] [2022-11-16 20:10:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762579746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:23,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:23,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:10:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253367612] [2022-11-16 20:10:23,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:23,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:10:23,695 INFO L87 Difference]: Start difference. First operand 869 states and 1112 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:23,911 INFO L93 Difference]: Finished difference Result 1810 states and 2271 transitions. [2022-11-16 20:10:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:23,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-16 20:10:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:23,918 INFO L225 Difference]: With dead ends: 1810 [2022-11-16 20:10:23,919 INFO L226 Difference]: Without dead ends: 1128 [2022-11-16 20:10:23,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:10:23,922 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:23,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 473 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:10:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-11-16 20:10:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1106. [2022-11-16 20:10:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 771 states have (on average 1.2749675745784694) internal successors, (983), 776 states have internal predecessors, (983), 188 states have call successors, (188), 148 states have call predecessors, (188), 145 states have return successors, (223), 183 states have call predecessors, (223), 186 states have call successors, (223) [2022-11-16 20:10:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1394 transitions. [2022-11-16 20:10:24,029 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1394 transitions. Word has length 47 [2022-11-16 20:10:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:24,029 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1394 transitions. [2022-11-16 20:10:24,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1394 transitions. [2022-11-16 20:10:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 20:10:24,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:24,032 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:24,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:10:24,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1556248517, now seen corresponding path program 1 times [2022-11-16 20:10:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:24,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830423724] [2022-11-16 20:10:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:10:24,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:24,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830423724] [2022-11-16 20:10:24,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830423724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:24,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:24,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:10:24,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169473661] [2022-11-16 20:10:24,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:24,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:10:24,088 INFO L87 Difference]: Start difference. First operand 1106 states and 1394 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:24,256 INFO L93 Difference]: Finished difference Result 1512 states and 1884 transitions. [2022-11-16 20:10:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-16 20:10:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:24,261 INFO L225 Difference]: With dead ends: 1512 [2022-11-16 20:10:24,262 INFO L226 Difference]: Without dead ends: 957 [2022-11-16 20:10:24,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:10:24,264 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 257 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:24,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 314 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:10:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-11-16 20:10:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 751. [2022-11-16 20:10:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 535 states have (on average 1.2710280373831775) internal successors, (680), 539 states have internal predecessors, (680), 125 states have call successors, (125), 94 states have call predecessors, (125), 89 states have return successors, (131), 119 states have call predecessors, (131), 123 states have call successors, (131) [2022-11-16 20:10:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 936 transitions. [2022-11-16 20:10:24,354 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 936 transitions. Word has length 53 [2022-11-16 20:10:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:24,354 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 936 transitions. [2022-11-16 20:10:24,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 936 transitions. [2022-11-16 20:10:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 20:10:24,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:24,357 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:24,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:10:24,357 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1834653725, now seen corresponding path program 1 times [2022-11-16 20:10:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:24,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066814604] [2022-11-16 20:10:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:24,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:24,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:24,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066814604] [2022-11-16 20:10:24,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066814604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:24,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:24,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:10:24,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221689482] [2022-11-16 20:10:24,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:24,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:10:24,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:24,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:10:24,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:10:24,459 INFO L87 Difference]: Start difference. First operand 751 states and 936 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 20:10:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:24,798 INFO L93 Difference]: Finished difference Result 1006 states and 1237 transitions. [2022-11-16 20:10:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:10:24,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-16 20:10:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:24,804 INFO L225 Difference]: With dead ends: 1006 [2022-11-16 20:10:24,805 INFO L226 Difference]: Without dead ends: 1003 [2022-11-16 20:10:24,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:24,810 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 473 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:24,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 293 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:10:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-16 20:10:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 750. [2022-11-16 20:10:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 535 states have (on average 1.2598130841121495) internal successors, (674), 538 states have internal predecessors, (674), 124 states have call successors, (124), 94 states have call predecessors, (124), 89 states have return successors, (131), 119 states have call predecessors, (131), 123 states have call successors, (131) [2022-11-16 20:10:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 929 transitions. [2022-11-16 20:10:24,936 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 929 transitions. Word has length 54 [2022-11-16 20:10:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:24,938 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 929 transitions. [2022-11-16 20:10:24,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 20:10:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 929 transitions. [2022-11-16 20:10:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 20:10:24,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:24,941 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] [2022-11-16 20:10:24,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:10:24,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1361671707, now seen corresponding path program 1 times [2022-11-16 20:10:24,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394857433] [2022-11-16 20:10:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:24,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:25,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394857433] [2022-11-16 20:10:25,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394857433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:25,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:25,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:10:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877600460] [2022-11-16 20:10:25,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:25,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:10:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:10:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:25,117 INFO L87 Difference]: Start difference. First operand 750 states and 929 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2022-11-16 20:10:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:26,037 INFO L93 Difference]: Finished difference Result 1353 states and 1903 transitions. [2022-11-16 20:10:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:10:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 52 [2022-11-16 20:10:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:26,044 INFO L225 Difference]: With dead ends: 1353 [2022-11-16 20:10:26,044 INFO L226 Difference]: Without dead ends: 1227 [2022-11-16 20:10:26,045 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 [2022-11-16 20:10:26,050 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 983 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:26,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 994 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 20:10:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-11-16 20:10:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1216. [2022-11-16 20:10:26,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 912 states have (on average 1.355263157894737) internal successors, (1236), 918 states have internal predecessors, (1236), 189 states have call successors, (189), 118 states have call predecessors, (189), 113 states have return successors, (238), 181 states have call predecessors, (238), 188 states have call successors, (238) [2022-11-16 20:10:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1663 transitions. [2022-11-16 20:10:26,176 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1663 transitions. Word has length 52 [2022-11-16 20:10:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:26,178 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 1663 transitions. [2022-11-16 20:10:26,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2022-11-16 20:10:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1663 transitions. [2022-11-16 20:10:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 20:10:26,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:26,181 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:26,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:10:26,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:26,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:26,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1040757541, now seen corresponding path program 1 times [2022-11-16 20:10:26,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:26,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369800497] [2022-11-16 20:10:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:26,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:26,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:26,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369800497] [2022-11-16 20:10:26,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369800497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:10:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203007292] [2022-11-16 20:10:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:26,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:26,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:26,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:26,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:10:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:10:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:26,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:10:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:27,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203007292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:10:27,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314792770] [2022-11-16 20:10:27,217 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-16 20:10:27,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:10:27,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:10:27,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:10:27,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:10:31,089 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 155 for LOIs [2022-11-16 20:10:31,123 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 151 for LOIs [2022-11-16 20:10:31,150 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 159 for LOIs [2022-11-16 20:10:31,886 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2022-11-16 20:10:31,969 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 155 for LOIs [2022-11-16 20:10:32,052 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 155 for LOIs [2022-11-16 20:10:32,085 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 162 for LOIs [2022-11-16 20:10:32,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:10:49,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1314792770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:49,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:10:49,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2022-11-16 20:10:49,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722814314] [2022-11-16 20:10:49,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:49,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 20:10:49,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 20:10:49,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 20:10:49,072 INFO L87 Difference]: Start difference. First operand 1216 states and 1663 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 20:11:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:19,668 INFO L93 Difference]: Finished difference Result 1877 states and 2437 transitions. [2022-11-16 20:11:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 20:11:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-16 20:11:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:19,681 INFO L225 Difference]: With dead ends: 1877 [2022-11-16 20:11:19,681 INFO L226 Difference]: Without dead ends: 1264 [2022-11-16 20:11:19,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 20:11:19,694 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 153 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 5443 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2490 SdHoareTripleChecker+Invalid, 5586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:19,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 2490 Invalid, 5586 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [143 Valid, 5443 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-11-16 20:11:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-11-16 20:11:19,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1249. [2022-11-16 20:11:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 937 states have (on average 1.3468516542155817) internal successors, (1262), 943 states have internal predecessors, (1262), 191 states have call successors, (191), 124 states have call predecessors, (191), 119 states have return successors, (240), 183 states have call predecessors, (240), 190 states have call successors, (240) [2022-11-16 20:11:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1693 transitions. [2022-11-16 20:11:19,887 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1693 transitions. Word has length 55 [2022-11-16 20:11:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:19,888 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1693 transitions. [2022-11-16 20:11:19,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 20:11:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1693 transitions. [2022-11-16 20:11:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 20:11:19,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:19,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:19,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:20,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:20,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:11:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1764559944, now seen corresponding path program 1 times [2022-11-16 20:11:20,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:20,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050104469] [2022-11-16 20:11:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:20,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:11:20,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:20,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050104469] [2022-11-16 20:11:20,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050104469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:20,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:20,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:11:20,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356234794] [2022-11-16 20:11:20,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:20,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:11:20,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:20,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:11:20,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:11:20,156 INFO L87 Difference]: Start difference. First operand 1249 states and 1693 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:11:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:20,449 INFO L93 Difference]: Finished difference Result 1831 states and 2376 transitions. [2022-11-16 20:11:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:11:20,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-16 20:11:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:20,459 INFO L225 Difference]: With dead ends: 1831 [2022-11-16 20:11:20,459 INFO L226 Difference]: Without dead ends: 1458 [2022-11-16 20:11:20,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:11:20,462 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 43 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:20,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 510 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2022-11-16 20:11:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1370. [2022-11-16 20:11:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1018 states have (on average 1.331041257367387) internal successors, (1355), 1028 states have internal predecessors, (1355), 213 states have call successors, (213), 146 states have call predecessors, (213), 137 states have return successors, (262), 197 states have call predecessors, (262), 212 states have call successors, (262) [2022-11-16 20:11:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1830 transitions. [2022-11-16 20:11:20,675 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1830 transitions. Word has length 61 [2022-11-16 20:11:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:20,675 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1830 transitions. [2022-11-16 20:11:20,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:11:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1830 transitions. [2022-11-16 20:11:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 20:11:20,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:20,678 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:20,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:11:20,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:11:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash -543402847, now seen corresponding path program 1 times [2022-11-16 20:11:20,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:20,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752932176] [2022-11-16 20:11:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:20,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:11:20,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:20,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752932176] [2022-11-16 20:11:20,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752932176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:20,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:20,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 20:11:20,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345713679] [2022-11-16 20:11:20,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:20,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:11:20,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:11:20,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:11:20,854 INFO L87 Difference]: Start difference. First operand 1370 states and 1830 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:11:21,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:21,769 INFO L93 Difference]: Finished difference Result 2367 states and 2990 transitions. [2022-11-16 20:11:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:11:21,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-16 20:11:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:21,777 INFO L225 Difference]: With dead ends: 2367 [2022-11-16 20:11:21,777 INFO L226 Difference]: Without dead ends: 1681 [2022-11-16 20:11:21,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:11:21,780 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 404 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:21,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 714 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:11:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2022-11-16 20:11:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1550. [2022-11-16 20:11:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1138 states have (on average 1.3040421792618628) internal successors, (1484), 1148 states have internal predecessors, (1484), 245 states have call successors, (245), 174 states have call predecessors, (245), 165 states have return successors, (294), 229 states have call predecessors, (294), 244 states have call successors, (294) [2022-11-16 20:11:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2023 transitions. [2022-11-16 20:11:22,013 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2023 transitions. Word has length 63 [2022-11-16 20:11:22,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:22,014 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2023 transitions. [2022-11-16 20:11:22,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:11:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2023 transitions. [2022-11-16 20:11:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 20:11:22,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:22,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:22,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:11:22,017 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:11:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:22,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1355168719, now seen corresponding path program 1 times [2022-11-16 20:11:22,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:22,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462795450] [2022-11-16 20:11:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:22,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:11:22,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462795450] [2022-11-16 20:11:22,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462795450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227074654] [2022-11-16 20:11:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:22,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:22,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:22,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:22,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:11:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:11:22,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:11:22,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:11:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:11:22,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227074654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:11:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722387362] [2022-11-16 20:11:22,758 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-16 20:11:22,758 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:11:22,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:11:22,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:11:22,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:11:32,905 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 155 for LOIs [2022-11-16 20:11:32,927 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 223 for LOIs [2022-11-16 20:11:33,006 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2022-11-16 20:11:33,085 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 159 for LOIs [2022-11-16 20:11:33,694 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2022-11-16 20:11:33,762 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 155 for LOIs [2022-11-16 20:11:33,813 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 155 for LOIs [2022-11-16 20:11:33,839 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 162 for LOIs [2022-11-16 20:11:33,863 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:12:10,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35209#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:12:10,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:12:10,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:10,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-16 20:12:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172348179] [2022-11-16 20:12:10,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:10,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:12:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:12:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 20:12:10,407 INFO L87 Difference]: Start difference. First operand 1550 states and 2023 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-16 20:12:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:11,467 INFO L93 Difference]: Finished difference Result 3757 states and 4552 transitions. [2022-11-16 20:12:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:12:11,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-16 20:12:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:11,509 INFO L225 Difference]: With dead ends: 3757 [2022-11-16 20:12:11,509 INFO L226 Difference]: Without dead ends: 3754 [2022-11-16 20:12:11,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 20:12:11,513 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 509 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:11,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 975 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:12:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-11-16 20:12:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 2865. [2022-11-16 20:12:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2030 states have (on average 1.2443349753694581) internal successors, (2526), 2048 states have internal predecessors, (2526), 472 states have call successors, (472), 378 states have call predecessors, (472), 361 states have return successors, (533), 440 states have call predecessors, (533), 471 states have call successors, (533) [2022-11-16 20:12:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3531 transitions. [2022-11-16 20:12:12,016 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3531 transitions. Word has length 64 [2022-11-16 20:12:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:12,016 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3531 transitions. [2022-11-16 20:12:12,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-16 20:12:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3531 transitions. [2022-11-16 20:12:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 20:12:12,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:12,019 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:12,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 20:12:12,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 20:12:12,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 804350377, now seen corresponding path program 2 times [2022-11-16 20:12:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:12,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548469507] [2022-11-16 20:12:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:12,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:12:12,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:12,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548469507] [2022-11-16 20:12:12,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548469507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:12,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:12:12,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:12:12,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147870004] [2022-11-16 20:12:12,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:12,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:12:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:12,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:12:12,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:12:12,300 INFO L87 Difference]: Start difference. First operand 2865 states and 3531 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:12:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:12,757 INFO L93 Difference]: Finished difference Result 4061 states and 4903 transitions. [2022-11-16 20:12:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:12:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-16 20:12:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:12,768 INFO L225 Difference]: With dead ends: 4061 [2022-11-16 20:12:12,768 INFO L226 Difference]: Without dead ends: 2123 [2022-11-16 20:12:12,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:12:12,773 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 262 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:12,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 352 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-11-16 20:12:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2107. [2022-11-16 20:12:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1524 states have (on average 1.2591863517060367) internal successors, (1919), 1534 states have internal predecessors, (1919), 336 states have call successors, (336), 254 states have call predecessors, (336), 245 states have return successors, (389), 320 states have call predecessors, (389), 335 states have call successors, (389) [2022-11-16 20:12:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2644 transitions. [2022-11-16 20:12:13,110 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2644 transitions. Word has length 67 [2022-11-16 20:12:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:13,110 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 2644 transitions. [2022-11-16 20:12:13,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:12:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2644 transitions. [2022-11-16 20:12:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 20:12:13,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:13,116 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 20:12:13,117 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:13,117 INFO L85 PathProgramCache]: Analyzing trace with hash 729881269, now seen corresponding path program 1 times [2022-11-16 20:12:13,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:13,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544847524] [2022-11-16 20:12:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:13,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:12:13,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:13,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544847524] [2022-11-16 20:12:13,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544847524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:13,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:12:13,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:12:13,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303164063] [2022-11-16 20:12:13,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:13,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:12:13,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:12:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:12:13,172 INFO L87 Difference]: Start difference. First operand 2107 states and 2644 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:12:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:13,622 INFO L93 Difference]: Finished difference Result 3704 states and 4472 transitions. [2022-11-16 20:12:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:12:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-16 20:12:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:13,637 INFO L225 Difference]: With dead ends: 3704 [2022-11-16 20:12:13,637 INFO L226 Difference]: Without dead ends: 2325 [2022-11-16 20:12:13,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:12:13,641 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 38 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:13,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 503 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2022-11-16 20:12:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2244. [2022-11-16 20:12:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 1621 states have (on average 1.2529302899444787) internal successors, (2031), 1637 states have internal predecessors, (2031), 357 states have call successors, (357), 275 states have call predecessors, (357), 264 states have return successors, (416), 333 states have call predecessors, (416), 356 states have call successors, (416) [2022-11-16 20:12:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2804 transitions. [2022-11-16 20:12:14,011 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2804 transitions. Word has length 71 [2022-11-16 20:12:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:14,012 INFO L495 AbstractCegarLoop]: Abstraction has 2244 states and 2804 transitions. [2022-11-16 20:12:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:12:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2804 transitions. [2022-11-16 20:12:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 20:12:14,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:14,016 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:14,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 20:12:14,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1445641267, now seen corresponding path program 1 times [2022-11-16 20:12:14,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:14,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918216616] [2022-11-16 20:12:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:14,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 20:12:14,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:14,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918216616] [2022-11-16 20:12:14,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918216616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754971713] [2022-11-16 20:12:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:14,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:14,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:14,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:14,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:12:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:14,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 20:12:14,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:12:14,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:12:14,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754971713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:14,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:12:14,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-16 20:12:14,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558008328] [2022-11-16 20:12:14,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:14,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:12:14,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:12:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:12:14,715 INFO L87 Difference]: Start difference. First operand 2244 states and 2804 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-16 20:12:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:15,323 INFO L93 Difference]: Finished difference Result 3644 states and 4460 transitions. [2022-11-16 20:12:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:12:15,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-16 20:12:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:15,347 INFO L225 Difference]: With dead ends: 3644 [2022-11-16 20:12:15,347 INFO L226 Difference]: Without dead ends: 2025 [2022-11-16 20:12:15,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:12:15,352 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 255 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:15,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1056 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:12:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-11-16 20:12:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1737. [2022-11-16 20:12:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1305 states have (on average 1.282758620689655) internal successors, (1674), 1319 states have internal predecessors, (1674), 253 states have call successors, (253), 184 states have call predecessors, (253), 177 states have return successors, (306), 235 states have call predecessors, (306), 252 states have call successors, (306) [2022-11-16 20:12:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2233 transitions. [2022-11-16 20:12:15,627 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2233 transitions. Word has length 102 [2022-11-16 20:12:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:15,627 INFO L495 AbstractCegarLoop]: Abstraction has 1737 states and 2233 transitions. [2022-11-16 20:12:15,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-16 20:12:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2233 transitions. [2022-11-16 20:12:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 20:12:15,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:15,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:15,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:15,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 20:12:15,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:15,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1222040967, now seen corresponding path program 1 times [2022-11-16 20:12:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:15,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658151722] [2022-11-16 20:12:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:15,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:12:15,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:15,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658151722] [2022-11-16 20:12:15,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658151722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:16,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022204100] [2022-11-16 20:12:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:16,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:16,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:16,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:12:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:16,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:12:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:12:16,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:12:16,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022204100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:16,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:12:16,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:12:16,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842989573] [2022-11-16 20:12:16,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:16,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:12:16,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:12:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:12:16,273 INFO L87 Difference]: Start difference. First operand 1737 states and 2233 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:12:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:16,695 INFO L93 Difference]: Finished difference Result 2905 states and 4132 transitions. [2022-11-16 20:12:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:12:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-16 20:12:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:16,708 INFO L225 Difference]: With dead ends: 2905 [2022-11-16 20:12:16,709 INFO L226 Difference]: Without dead ends: 2313 [2022-11-16 20:12:16,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:12:16,714 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 253 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:16,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-11-16 20:12:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2306. [2022-11-16 20:12:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1767 states have (on average 1.3338992642897567) internal successors, (2357), 1784 states have internal predecessors, (2357), 330 states have call successors, (330), 214 states have call predecessors, (330), 207 states have return successors, (421), 309 states have call predecessors, (421), 329 states have call successors, (421) [2022-11-16 20:12:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3108 transitions. [2022-11-16 20:12:17,073 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3108 transitions. Word has length 101 [2022-11-16 20:12:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:17,073 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3108 transitions. [2022-11-16 20:12:17,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:12:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3108 transitions. [2022-11-16 20:12:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 20:12:17,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:17,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:17,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:17,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:17,286 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash 30957047, now seen corresponding path program 1 times [2022-11-16 20:12:17,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:17,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227143453] [2022-11-16 20:12:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:12:17,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227143453] [2022-11-16 20:12:17,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227143453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945621442] [2022-11-16 20:12:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:17,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:17,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:17,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:12:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:17,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:12:17,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 20:12:17,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:12:17,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945621442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:17,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:12:17,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:12:17,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892863137] [2022-11-16 20:12:17,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:17,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:12:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:17,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:12:17,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:12:17,686 INFO L87 Difference]: Start difference. First operand 2306 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:12:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:18,246 INFO L93 Difference]: Finished difference Result 4597 states and 6804 transitions. [2022-11-16 20:12:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:12:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-16 20:12:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:18,264 INFO L225 Difference]: With dead ends: 4597 [2022-11-16 20:12:18,264 INFO L226 Difference]: Without dead ends: 3436 [2022-11-16 20:12:18,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:12:18,272 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 247 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:18,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2022-11-16 20:12:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3424. [2022-11-16 20:12:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 2676 states have (on average 1.3800448430493273) internal successors, (3693), 2699 states have internal predecessors, (3693), 479 states have call successors, (479), 274 states have call predecessors, (479), 267 states have return successors, (642), 452 states have call predecessors, (642), 478 states have call successors, (642) [2022-11-16 20:12:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 4814 transitions. [2022-11-16 20:12:18,759 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 4814 transitions. Word has length 101 [2022-11-16 20:12:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:18,759 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 4814 transitions. [2022-11-16 20:12:18,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:12:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 4814 transitions. [2022-11-16 20:12:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 20:12:18,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:18,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:18,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:18,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 20:12:18,974 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -511602699, now seen corresponding path program 1 times [2022-11-16 20:12:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91970360] [2022-11-16 20:12:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:12:19,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:19,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91970360] [2022-11-16 20:12:19,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91970360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383156881] [2022-11-16 20:12:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:19,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:19,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:19,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:12:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:12:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:12:19,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:12:19,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383156881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:19,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:12:19,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:12:19,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003233867] [2022-11-16 20:12:19,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:19,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:12:19,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:19,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:12:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:12:19,383 INFO L87 Difference]: Start difference. First operand 3424 states and 4814 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:12:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:20,188 INFO L93 Difference]: Finished difference Result 7921 states and 12007 transitions. [2022-11-16 20:12:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:12:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-16 20:12:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:20,236 INFO L225 Difference]: With dead ends: 7921 [2022-11-16 20:12:20,237 INFO L226 Difference]: Without dead ends: 5642 [2022-11-16 20:12:20,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:12:20,253 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 256 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:20,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2022-11-16 20:12:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5620. [2022-11-16 20:12:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5620 states, 4464 states have (on average 1.412410394265233) internal successors, (6305), 4499 states have internal predecessors, (6305), 767 states have call successors, (767), 394 states have call predecessors, (767), 387 states have return successors, (1066), 728 states have call predecessors, (1066), 766 states have call successors, (1066) [2022-11-16 20:12:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5620 states to 5620 states and 8138 transitions. [2022-11-16 20:12:20,950 INFO L78 Accepts]: Start accepts. Automaton has 5620 states and 8138 transitions. Word has length 101 [2022-11-16 20:12:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:20,950 INFO L495 AbstractCegarLoop]: Abstraction has 5620 states and 8138 transitions. [2022-11-16 20:12:20,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:12:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 5620 states and 8138 transitions. [2022-11-16 20:12:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 20:12:20,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:20,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:20,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:21,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 20:12:21,170 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:21,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:21,171 INFO L85 PathProgramCache]: Analyzing trace with hash -8537161, now seen corresponding path program 1 times [2022-11-16 20:12:21,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:21,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126706604] [2022-11-16 20:12:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:21,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 20:12:21,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:21,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126706604] [2022-11-16 20:12:21,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126706604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:21,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:12:21,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:12:21,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739947210] [2022-11-16 20:12:21,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:21,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:12:21,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:12:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:12:21,315 INFO L87 Difference]: Start difference. First operand 5620 states and 8138 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:12:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:22,087 INFO L93 Difference]: Finished difference Result 10230 states and 15503 transitions. [2022-11-16 20:12:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:12:22,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2022-11-16 20:12:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:22,121 INFO L225 Difference]: With dead ends: 10230 [2022-11-16 20:12:22,122 INFO L226 Difference]: Without dead ends: 6644 [2022-11-16 20:12:22,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:12:22,140 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 83 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:22,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 563 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2022-11-16 20:12:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 6260. [2022-11-16 20:12:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 5072 states have (on average 1.449723974763407) internal successors, (7353), 5107 states have internal predecessors, (7353), 783 states have call successors, (783), 410 states have call predecessors, (783), 403 states have return successors, (1082), 744 states have call predecessors, (1082), 782 states have call successors, (1082) [2022-11-16 20:12:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 9218 transitions. [2022-11-16 20:12:23,151 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 9218 transitions. Word has length 101 [2022-11-16 20:12:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:23,152 INFO L495 AbstractCegarLoop]: Abstraction has 6260 states and 9218 transitions. [2022-11-16 20:12:23,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:12:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 9218 transitions. [2022-11-16 20:12:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 20:12:23,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:23,165 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:23,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 20:12:23,165 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1667601710, now seen corresponding path program 1 times [2022-11-16 20:12:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:23,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315218491] [2022-11-16 20:12:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:23,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 20:12:23,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:23,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315218491] [2022-11-16 20:12:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315218491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732069610] [2022-11-16 20:12:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:23,438 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:23,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:12:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:23,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:12:23,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:12:23,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:12:23,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732069610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:23,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:12:23,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-16 20:12:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169187] [2022-11-16 20:12:23,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:23,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:12:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:23,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:12:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:12:23,680 INFO L87 Difference]: Start difference. First operand 6260 states and 9218 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-16 20:12:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:24,672 INFO L93 Difference]: Finished difference Result 7046 states and 10113 transitions. [2022-11-16 20:12:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:12:24,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-16 20:12:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:24,697 INFO L225 Difference]: With dead ends: 7046 [2022-11-16 20:12:24,698 INFO L226 Difference]: Without dead ends: 5988 [2022-11-16 20:12:24,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:12:24,705 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 72 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:24,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1102 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:12:24,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5988 states. [2022-11-16 20:12:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5988 to 5870. [2022-11-16 20:12:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 4792 states have (on average 1.4657762938230383) internal successors, (7024), 4821 states have internal predecessors, (7024), 724 states have call successors, (724), 355 states have call predecessors, (724), 352 states have return successors, (1013), 695 states have call predecessors, (1013), 723 states have call successors, (1013) [2022-11-16 20:12:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 8761 transitions. [2022-11-16 20:12:25,414 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 8761 transitions. Word has length 112 [2022-11-16 20:12:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:25,414 INFO L495 AbstractCegarLoop]: Abstraction has 5870 states and 8761 transitions. [2022-11-16 20:12:25,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-16 20:12:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 8761 transitions. [2022-11-16 20:12:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 20:12:25,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:25,426 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:25,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:25,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 20:12:25,631 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash 892190063, now seen corresponding path program 1 times [2022-11-16 20:12:25,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:25,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255139175] [2022-11-16 20:12:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 20:12:25,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:25,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255139175] [2022-11-16 20:12:25,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255139175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:25,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:12:25,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:12:25,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262070009] [2022-11-16 20:12:25,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:12:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:12:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:12:25,702 INFO L87 Difference]: Start difference. First operand 5870 states and 8761 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 20:12:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:26,627 INFO L93 Difference]: Finished difference Result 6363 states and 9319 transitions. [2022-11-16 20:12:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:12:26,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 113 [2022-11-16 20:12:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:26,651 INFO L225 Difference]: With dead ends: 6363 [2022-11-16 20:12:26,651 INFO L226 Difference]: Without dead ends: 5737 [2022-11-16 20:12:26,655 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 [2022-11-16 20:12:26,656 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 308 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:26,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 465 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:12:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5737 states. [2022-11-16 20:12:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5737 to 5690. [2022-11-16 20:12:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 4664 states have (on average 1.474056603773585) internal successors, (6875), 4691 states have internal predecessors, (6875), 696 states have call successors, (696), 329 states have call predecessors, (696), 328 states have return successors, (983), 671 states have call predecessors, (983), 695 states have call successors, (983) [2022-11-16 20:12:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8554 transitions. [2022-11-16 20:12:27,582 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8554 transitions. Word has length 113 [2022-11-16 20:12:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:27,582 INFO L495 AbstractCegarLoop]: Abstraction has 5690 states and 8554 transitions. [2022-11-16 20:12:27,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 20:12:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8554 transitions. [2022-11-16 20:12:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 20:12:27,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:27,595 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:27,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 20:12:27,596 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:27,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1849118446, now seen corresponding path program 1 times [2022-11-16 20:12:27,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:27,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280634813] [2022-11-16 20:12:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:27,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 20:12:27,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:27,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280634813] [2022-11-16 20:12:27,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280634813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:27,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653732229] [2022-11-16 20:12:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:27,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:27,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:27,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:27,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:12:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:28,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:12:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:12:28,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:12:28,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653732229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:28,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:12:28,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-16 20:12:28,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023314682] [2022-11-16 20:12:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:28,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:12:28,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:28,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:12:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:12:28,103 INFO L87 Difference]: Start difference. First operand 5690 states and 8554 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 20:12:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:29,169 INFO L93 Difference]: Finished difference Result 6439 states and 9399 transitions. [2022-11-16 20:12:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:12:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-16 20:12:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:29,192 INFO L225 Difference]: With dead ends: 6439 [2022-11-16 20:12:29,192 INFO L226 Difference]: Without dead ends: 5982 [2022-11-16 20:12:29,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:12:29,197 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 239 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:29,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1155 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:12:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5982 states. [2022-11-16 20:12:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5982 to 5948. [2022-11-16 20:12:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 4826 states have (on average 1.4618731869042685) internal successors, (7055), 4859 states have internal predecessors, (7055), 744 states have call successors, (744), 371 states have call predecessors, (744), 376 states have return successors, (1043), 719 states have call predecessors, (1043), 743 states have call successors, (1043) [2022-11-16 20:12:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 8842 transitions. [2022-11-16 20:12:29,693 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 8842 transitions. Word has length 113 [2022-11-16 20:12:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:29,694 INFO L495 AbstractCegarLoop]: Abstraction has 5948 states and 8842 transitions. [2022-11-16 20:12:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 20:12:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 8842 transitions. [2022-11-16 20:12:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-16 20:12:29,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:29,706 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:29,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:29,913 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:12:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1204142891, now seen corresponding path program 1 times [2022-11-16 20:12:29,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:29,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572779420] [2022-11-16 20:12:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:29,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:12:31,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:31,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572779420] [2022-11-16 20:12:31,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572779420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:31,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927000506] [2022-11-16 20:12:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:31,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:31,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:31,038 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:31,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:12:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 20:12:31,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:12:32,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:12:34,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927000506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783752454] [2022-11-16 20:12:34,251 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-16 20:12:34,252 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:34,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:12:34,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:12:34,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:13:30,716 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 272 for LOIs [2022-11-16 20:13:31,310 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 223 for LOIs [2022-11-16 20:13:31,397 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 214 for LOIs [2022-11-16 20:13:31,473 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 284 for LOIs [2022-11-16 20:13:33,885 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 162 for LOIs [2022-11-16 20:13:34,198 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 108 for LOIs [2022-11-16 20:13:34,476 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 276 for LOIs [2022-11-16 20:13:35,087 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 299 for LOIs [2022-11-16 20:13:35,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:14:46,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '188237#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t4_i~0 0) (= ~T7_E~0 2) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (= ~E_2~0 2) (<= ~E_6~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:14:46,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:14:46,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:14:46,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-16 20:14:46,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644915741] [2022-11-16 20:14:46,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:14:46,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 20:14:46,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:14:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 20:14:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=10774, Unknown=0, NotChecked=0, Total=11556 [2022-11-16 20:14:46,077 INFO L87 Difference]: Start difference. First operand 5948 states and 8842 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-16 20:15:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:15:13,565 INFO L93 Difference]: Finished difference Result 8461 states and 11760 transitions. [2022-11-16 20:15:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-16 20:15:13,566 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-16 20:15:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:15:13,596 INFO L225 Difference]: With dead ends: 8461 [2022-11-16 20:15:13,596 INFO L226 Difference]: Without dead ends: 7743 [2022-11-16 20:15:13,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44669 ImplicationChecksByTransitivity, 91.1s TimeCoverageRelationStatistics Valid=10069, Invalid=99823, Unknown=0, NotChecked=0, Total=109892 [2022-11-16 20:15:13,620 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5235 mSDsluCounter, 2779 mSDsCounter, 0 mSdLazyCounter, 7704 mSolverCounterSat, 2713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5235 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 10417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2713 IncrementalHoareTripleChecker+Valid, 7704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:15:13,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5235 Valid, 2994 Invalid, 10417 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2713 Valid, 7704 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-16 20:15:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7743 states. [2022-11-16 20:15:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7743 to 6223. [2022-11-16 20:15:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6223 states, 5009 states have (on average 1.450189658614494) internal successors, (7264), 5044 states have internal predecessors, (7264), 789 states have call successors, (789), 408 states have call predecessors, (789), 423 states have return successors, (1100), 772 states have call predecessors, (1100), 788 states have call successors, (1100) [2022-11-16 20:15:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6223 states to 6223 states and 9153 transitions. [2022-11-16 20:15:14,545 INFO L78 Accepts]: Start accepts. Automaton has 6223 states and 9153 transitions. Word has length 114 [2022-11-16 20:15:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:15:14,545 INFO L495 AbstractCegarLoop]: Abstraction has 6223 states and 9153 transitions. [2022-11-16 20:15:14,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-16 20:15:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6223 states and 9153 transitions. [2022-11-16 20:15:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 20:15:14,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:15:14,556 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:15:14,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:15:14,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 20:15:14,765 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:15:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:15:14,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2135928949, now seen corresponding path program 1 times [2022-11-16 20:15:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:15:14,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578926976] [2022-11-16 20:15:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:15:14,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:15:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:15:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:15:15,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:15:15,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578926976] [2022-11-16 20:15:15,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578926976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:15:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62005759] [2022-11-16 20:15:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:15:15,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:15:15,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:15:15,176 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:15:15,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:15:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:15:15,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 20:15:15,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:15:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:15:15,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:15:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 20:15:15,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62005759] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 20:15:15,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:15:15,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-16 20:15:15,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158712051] [2022-11-16 20:15:15,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:15:15,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:15:15,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:15:15,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:15:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:15:15,709 INFO L87 Difference]: Start difference. First operand 6223 states and 9153 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 20:15:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:15:17,275 INFO L93 Difference]: Finished difference Result 7547 states and 10701 transitions. [2022-11-16 20:15:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 20:15:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-16 20:15:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:15:17,307 INFO L225 Difference]: With dead ends: 7547 [2022-11-16 20:15:17,307 INFO L226 Difference]: Without dead ends: 6556 [2022-11-16 20:15:17,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-16 20:15:17,315 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 407 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:15:17,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 512 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:15:17,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-16 20:15:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6303. [2022-11-16 20:15:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 5054 states have (on average 1.4473684210526316) internal successors, (7315), 5092 states have internal predecessors, (7315), 808 states have call successors, (808), 417 states have call predecessors, (808), 439 states have return successors, (1140), 795 states have call predecessors, (1140), 807 states have call successors, (1140) [2022-11-16 20:15:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 9263 transitions. [2022-11-16 20:15:18,383 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 9263 transitions. Word has length 115 [2022-11-16 20:15:18,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:15:18,384 INFO L495 AbstractCegarLoop]: Abstraction has 6303 states and 9263 transitions. [2022-11-16 20:15:18,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 20:15:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 9263 transitions. [2022-11-16 20:15:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 20:15:18,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:15:18,396 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:15:18,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:15:18,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 20:15:18,608 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:15:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:15:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash -795443035, now seen corresponding path program 1 times [2022-11-16 20:15:18,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:15:18,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377325446] [2022-11-16 20:15:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:15:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:15:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:15:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 20:15:19,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:15:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377325446] [2022-11-16 20:15:19,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377325446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:15:19,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347855384] [2022-11-16 20:15:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:15:19,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:15:19,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:15:19,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:15:19,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:15:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:15:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 20:15:19,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:15:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:15:21,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:15:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 20:15:23,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347855384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:15:23,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932989183] [2022-11-16 20:15:23,034 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-16 20:15:23,034 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:15:23,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:15:23,035 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:15:23,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:15:36,350 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 272 for LOIs [2022-11-16 20:15:37,017 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 222 for LOIs [2022-11-16 20:15:37,083 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 110 for LOIs [2022-11-16 20:15:37,098 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 284 for LOIs [2022-11-16 20:15:39,475 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 162 for LOIs [2022-11-16 20:15:39,778 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 110 for LOIs [2022-11-16 20:15:40,035 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 276 for LOIs [2022-11-16 20:15:40,761 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 299 for LOIs [2022-11-16 20:15:41,304 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:16:45,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '231139#(and (= ~q_req_up~0 1) (or (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= 2 ~p_dw_st~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 0 ~t3_pc~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0))' at error location [2022-11-16 20:16:45,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:16:45,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:16:45,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-16 20:16:45,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538320941] [2022-11-16 20:16:45,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:16:45,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 20:16:45,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:16:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 20:16:45,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=953, Invalid=11703, Unknown=0, NotChecked=0, Total=12656 [2022-11-16 20:16:45,603 INFO L87 Difference]: Start difference. First operand 6303 states and 9263 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-16 20:17:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:06,187 INFO L93 Difference]: Finished difference Result 8587 states and 11965 transitions. [2022-11-16 20:17:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-16 20:17:06,188 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-16 20:17:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:06,216 INFO L225 Difference]: With dead ends: 8587 [2022-11-16 20:17:06,216 INFO L226 Difference]: Without dead ends: 7516 [2022-11-16 20:17:06,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26843 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=6751, Invalid=62681, Unknown=0, NotChecked=0, Total=69432 [2022-11-16 20:17:06,228 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 6036 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 9218 mSolverCounterSat, 3887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6036 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 13105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3887 IncrementalHoareTripleChecker+Valid, 9218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:06,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6036 Valid, 3373 Invalid, 13105 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3887 Valid, 9218 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-16 20:17:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2022-11-16 20:17:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6119. [2022-11-16 20:17:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 4942 states have (on average 1.4542695265074868) internal successors, (7187), 4979 states have internal predecessors, (7187), 768 states have call successors, (768), 385 states have call predecessors, (768), 407 states have return successors, (1090), 756 states have call predecessors, (1090), 767 states have call successors, (1090) [2022-11-16 20:17:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 9045 transitions. [2022-11-16 20:17:07,254 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 9045 transitions. Word has length 124 [2022-11-16 20:17:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:07,255 INFO L495 AbstractCegarLoop]: Abstraction has 6119 states and 9045 transitions. [2022-11-16 20:17:07,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-16 20:17:07,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 9045 transitions. [2022-11-16 20:17:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-16 20:17:07,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:07,264 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:07,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:07,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:17:07,464 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:17:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash 659710019, now seen corresponding path program 1 times [2022-11-16 20:17:07,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:17:07,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622403778] [2022-11-16 20:17:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:07,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:17:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 20:17:07,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:17:07,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622403778] [2022-11-16 20:17:07,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622403778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:17:07,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283017115] [2022-11-16 20:17:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:07,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:17:07,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:17:07,729 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:17:07,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 20:17:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:07,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 20:17:07,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 20:17:08,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 20:17:08,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283017115] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 20:17:08,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:17:08,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-16 20:17:08,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551638289] [2022-11-16 20:17:08,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:17:08,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:17:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:17:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:17:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:17:08,266 INFO L87 Difference]: Start difference. First operand 6119 states and 9045 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 20:17:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:10,170 INFO L93 Difference]: Finished difference Result 6774 states and 9786 transitions. [2022-11-16 20:17:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 20:17:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-16 20:17:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:10,193 INFO L225 Difference]: With dead ends: 6774 [2022-11-16 20:17:10,193 INFO L226 Difference]: Without dead ends: 5887 [2022-11-16 20:17:10,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:17:10,200 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 548 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:10,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 597 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:17:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5887 states. [2022-11-16 20:17:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5887 to 5850. [2022-11-16 20:17:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5850 states, 4743 states have (on average 1.4636306135357369) internal successors, (6942), 4780 states have internal predecessors, (6942), 732 states have call successors, (732), 355 states have call predecessors, (732), 373 states have return successors, (1049), 716 states have call predecessors, (1049), 731 states have call successors, (1049) [2022-11-16 20:17:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5850 states to 5850 states and 8723 transitions. [2022-11-16 20:17:11,190 INFO L78 Accepts]: Start accepts. Automaton has 5850 states and 8723 transitions. Word has length 125 [2022-11-16 20:17:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:11,191 INFO L495 AbstractCegarLoop]: Abstraction has 5850 states and 8723 transitions. [2022-11-16 20:17:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 20:17:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5850 states and 8723 transitions. [2022-11-16 20:17:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 20:17:11,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:11,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:11,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:11,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 20:17:11,402 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:17:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2137145289, now seen corresponding path program 1 times [2022-11-16 20:17:11,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:17:11,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656151263] [2022-11-16 20:17:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:11,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:17:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 20:17:11,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:17:11,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656151263] [2022-11-16 20:17:11,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656151263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:17:11,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:17:11,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:17:11,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833028292] [2022-11-16 20:17:11,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:17:11,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:17:11,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:17:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:17:11,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:17:11,500 INFO L87 Difference]: Start difference. First operand 5850 states and 8723 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:17:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:13,654 INFO L93 Difference]: Finished difference Result 15903 states and 24764 transitions. [2022-11-16 20:17:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:17:13,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-16 20:17:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:13,693 INFO L225 Difference]: With dead ends: 15903 [2022-11-16 20:17:13,694 INFO L226 Difference]: Without dead ends: 10788 [2022-11-16 20:17:13,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:17:13,718 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 246 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:13,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:17:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2022-11-16 20:17:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10730. [2022-11-16 20:17:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 8795 states have (on average 1.4724275156338829) internal successors, (12950), 8856 states have internal predecessors, (12950), 1304 states have call successors, (1304), 611 states have call predecessors, (1304), 629 states have return successors, (1877), 1264 states have call predecessors, (1877), 1303 states have call successors, (1877) [2022-11-16 20:17:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 16131 transitions. [2022-11-16 20:17:15,960 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 16131 transitions. Word has length 136 [2022-11-16 20:17:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:15,960 INFO L495 AbstractCegarLoop]: Abstraction has 10730 states and 16131 transitions. [2022-11-16 20:17:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:17:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 16131 transitions. [2022-11-16 20:17:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 20:17:15,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:15,988 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:15,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-16 20:17:15,988 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:17:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash -534157951, now seen corresponding path program 1 times [2022-11-16 20:17:15,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:17:15,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258665457] [2022-11-16 20:17:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:15,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:17:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 20:17:16,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:17:16,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258665457] [2022-11-16 20:17:16,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258665457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:17:16,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:17:16,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:17:16,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010378418] [2022-11-16 20:17:16,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:17:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:17:16,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:17:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:17:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:17:16,075 INFO L87 Difference]: Start difference. First operand 10730 states and 16131 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:17:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:19,456 INFO L93 Difference]: Finished difference Result 30367 states and 47144 transitions. [2022-11-16 20:17:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:17:19,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-16 20:17:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:19,532 INFO L225 Difference]: With dead ends: 30367 [2022-11-16 20:17:19,533 INFO L226 Difference]: Without dead ends: 20372 [2022-11-16 20:17:19,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:17:19,578 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 248 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:19,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:17:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20372 states. [2022-11-16 20:17:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20372 to 20258. [2022-11-16 20:17:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20258 states, 16707 states have (on average 1.4713593104686657) internal successors, (24582), 16816 states have internal predecessors, (24582), 2408 states have call successors, (2408), 1123 states have call predecessors, (2408), 1141 states have return successors, (3461), 2320 states have call predecessors, (3461), 2407 states have call successors, (3461) [2022-11-16 20:17:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20258 states to 20258 states and 30451 transitions. [2022-11-16 20:17:23,089 INFO L78 Accepts]: Start accepts. Automaton has 20258 states and 30451 transitions. Word has length 136 [2022-11-16 20:17:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:23,089 INFO L495 AbstractCegarLoop]: Abstraction has 20258 states and 30451 transitions. [2022-11-16 20:17:23,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:17:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 20258 states and 30451 transitions. [2022-11-16 20:17:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 20:17:23,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:23,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:23,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 20:17:23,121 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:17:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 399066693, now seen corresponding path program 1 times [2022-11-16 20:17:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:17:23,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014216857] [2022-11-16 20:17:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:23,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:17:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 20:17:23,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:17:23,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014216857] [2022-11-16 20:17:23,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014216857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:17:23,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:17:23,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:17:23,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115679164] [2022-11-16 20:17:23,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:17:23,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:17:23,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:17:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:17:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:17:23,213 INFO L87 Difference]: Start difference. First operand 20258 states and 30451 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:17:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:29,385 INFO L93 Difference]: Finished difference Result 58599 states and 90344 transitions. [2022-11-16 20:17:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:17:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-16 20:17:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:29,507 INFO L225 Difference]: With dead ends: 58599 [2022-11-16 20:17:29,507 INFO L226 Difference]: Without dead ends: 39076 [2022-11-16 20:17:29,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:17:29,615 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 251 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:29,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:17:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39076 states. [2022-11-16 20:17:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39076 to 38850. [2022-11-16 20:17:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38850 states, 32147 states have (on average 1.4644601362491056) internal successors, (47078), 32352 states have internal predecessors, (47078), 4536 states have call successors, (4536), 2147 states have call predecessors, (4536), 2165 states have return successors, (6485), 4352 states have call predecessors, (6485), 4535 states have call successors, (6485) [2022-11-16 20:17:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38850 states to 38850 states and 58099 transitions. [2022-11-16 20:17:35,927 INFO L78 Accepts]: Start accepts. Automaton has 38850 states and 58099 transitions. Word has length 136 [2022-11-16 20:17:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:35,927 INFO L495 AbstractCegarLoop]: Abstraction has 38850 states and 58099 transitions. [2022-11-16 20:17:35,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:17:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 38850 states and 58099 transitions. [2022-11-16 20:17:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 20:17:36,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:36,073 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:36,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 20:17:36,074 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:17:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1107251036, now seen corresponding path program 1 times [2022-11-16 20:17:36,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:17:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846865373] [2022-11-16 20:17:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:17:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-16 20:17:36,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:17:36,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846865373] [2022-11-16 20:17:36,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846865373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:17:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068698135] [2022-11-16 20:17:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:36,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:17:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:17:36,267 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:17:36,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5363de7f-5cc0-4672-98e6-6bd3e3004489/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 20:17:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:36,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:17:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 20:17:36,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:17:36,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068698135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:17:36,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:17:36,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 20:17:36,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54131205] [2022-11-16 20:17:36,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:17:36,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:17:36,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:17:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:17:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:17:36,597 INFO L87 Difference]: Start difference. First operand 38850 states and 58099 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 20:17:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:43,311 INFO L93 Difference]: Finished difference Result 71869 states and 107304 transitions. [2022-11-16 20:17:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:17:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-11-16 20:17:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:43,471 INFO L225 Difference]: With dead ends: 71869 [2022-11-16 20:17:43,471 INFO L226 Difference]: Without dead ends: 49339 [2022-11-16 20:17:43,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:17:43,669 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 243 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:43,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 303 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:17:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49339 states.