./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b8de634f132d76c1b6698e4c3a5f12df478fc7c8b9ceb30d48afc80707f7564 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 04:06:34,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:06:34,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:06:34,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:06:34,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:06:34,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:06:34,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:06:34,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:06:34,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:06:34,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:06:34,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:06:34,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:06:34,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:06:34,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:06:34,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:06:34,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:06:34,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:06:34,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:06:34,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:06:34,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:06:34,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:06:34,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:06:34,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:06:34,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:06:34,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:06:34,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:06:34,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:06:34,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:06:34,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:06:34,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:06:34,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:06:34,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:06:34,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:06:34,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:06:34,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:06:34,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:06:34,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:06:34,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:06:34,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:06:34,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:06:34,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:06:34,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:06:34,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:06:34,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:06:34,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:06:34,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:06:34,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:06:34,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:06:34,383 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:06:34,383 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:06:34,383 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:06:34,383 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:06:34,385 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:06:34,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:06:34,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:06:34,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:06:34,386 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:06:34,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:06:34,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:06:34,386 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:06:34,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:06:34,387 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:06:34,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:06:34,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:06:34,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:06:34,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:06:34,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:06:34,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:06:34,390 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:06:34,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:06:34,391 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:06:34,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:06:34,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:06:34,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:06:34,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:34,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:06:34,392 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:06:34,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:06:34,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:06:34,393 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:06:34,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:06:34,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:06:34,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:06:34,394 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_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b8de634f132d76c1b6698e4c3a5f12df478fc7c8b9ceb30d48afc80707f7564 [2022-11-03 04:06:34,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:06:34,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:06:34,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:06:34,777 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:06:34,778 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:06:34,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c [2022-11-03 04:06:34,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/data/daea994ec/e54fb0fa64144261bf1963fbd0c918ad/FLAGd5b41316a [2022-11-03 04:06:35,490 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:06:35,492 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c [2022-11-03 04:06:35,524 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/data/daea994ec/e54fb0fa64144261bf1963fbd0c918ad/FLAGd5b41316a [2022-11-03 04:06:35,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/data/daea994ec/e54fb0fa64144261bf1963fbd0c918ad [2022-11-03 04:06:35,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:06:35,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:06:35,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:35,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:06:35,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:06:35,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:35" (1/1) ... [2022-11-03 04:06:35,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58cc6143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:35, skipping insertion in model container [2022-11-03 04:06:35,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:35" (1/1) ... [2022-11-03 04:06:35,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:06:35,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:06:36,099 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c[911,924] [2022-11-03 04:06:36,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c[8416,8429] [2022-11-03 04:06:36,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:36,373 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:06:36,394 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c[911,924] [2022-11-03 04:06:36,445 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c[8416,8429] [2022-11-03 04:06:36,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:36,522 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:06:36,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36 WrapperNode [2022-11-03 04:06:36,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:36,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:06:36,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:06:36,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:06:36,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,623 INFO L138 Inliner]: procedures = 77, calls = 95, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1025 [2022-11-03 04:06:36,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:06:36,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:06:36,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:06:36,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:06:36,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,680 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:06:36,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:06:36,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:06:36,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:06:36,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (1/1) ... [2022-11-03 04:06:36,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:36,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:36,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:06:36,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:06:36,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:06:36,788 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 04:06:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 04:06:36,788 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 04:06:36,789 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 04:06:36,789 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 04:06:36,789 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 04:06:36,789 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 04:06:36,790 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 04:06:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 04:06:36,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 04:06:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 04:06:36,791 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 04:06:36,791 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 04:06:36,791 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 04:06:36,791 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 04:06:36,792 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 04:06:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 04:06:36,792 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 04:06:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 04:06:36,792 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 04:06:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 04:06:36,793 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 04:06:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:06:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 04:06:36,794 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 04:06:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 04:06:36,794 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 04:06:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:06:36,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:06:36,795 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 04:06:36,795 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 04:06:36,795 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-03 04:06:36,795 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-03 04:06:36,951 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:06:36,970 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:06:38,239 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-03 04:06:38,239 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-03 04:06:38,337 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:06:39,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:06:39,018 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-11-03 04:06:39,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:06:39 BoogieIcfgContainer [2022-11-03 04:06:39,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:06:39,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:06:39,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:06:39,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:06:39,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:06:35" (1/3) ... [2022-11-03 04:06:39,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2804d234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:06:39, skipping insertion in model container [2022-11-03 04:06:39,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:36" (2/3) ... [2022-11-03 04:06:39,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2804d234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:06:39, skipping insertion in model container [2022-11-03 04:06:39,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:06:39" (3/3) ... [2022-11-03 04:06:39,039 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.11.cil-1.c [2022-11-03 04:06:39,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:06:39,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 04:06:39,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:06:39,170 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;@1fd8f38d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:06:39,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 04:06:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 201 states have (on average 1.5472636815920398) internal successors, (311), 209 states have internal predecessors, (311), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-03 04:06:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 04:06:39,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:39,210 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] [2022-11-03 04:06:39,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:39,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1723582248, now seen corresponding path program 1 times [2022-11-03 04:06:39,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:39,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539386455] [2022-11-03 04:06:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:39,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:39,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:39,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539386455] [2022-11-03 04:06:39,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539386455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:39,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:06:39,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:06:39,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813370560] [2022-11-03 04:06:39,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:39,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:06:39,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:39,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:06:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:06:39,742 INFO L87 Difference]: Start difference. First operand has 262 states, 201 states have (on average 1.5472636815920398) internal successors, (311), 209 states have internal predecessors, (311), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 04:06:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:40,489 INFO L93 Difference]: Finished difference Result 646 states and 972 transitions. [2022-11-03 04:06:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:06:40,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-03 04:06:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:40,507 INFO L225 Difference]: With dead ends: 646 [2022-11-03 04:06:40,523 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 04:06:40,529 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 [2022-11-03 04:06:40,533 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 447 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:40,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 690 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:06:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 04:06:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 374. [2022-11-03 04:06:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 282 states have (on average 1.4574468085106382) internal successors, (411), 287 states have internal predecessors, (411), 63 states have call successors, (63), 29 states have call predecessors, (63), 27 states have return successors, (62), 59 states have call predecessors, (62), 59 states have call successors, (62) [2022-11-03 04:06:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 536 transitions. [2022-11-03 04:06:40,676 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 536 transitions. Word has length 44 [2022-11-03 04:06:40,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:40,677 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 536 transitions. [2022-11-03 04:06:40,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 04:06:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 536 transitions. [2022-11-03 04:06:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 04:06:40,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:40,680 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] [2022-11-03 04:06:40,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:06:40,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:40,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1866101275, now seen corresponding path program 1 times [2022-11-03 04:06:40,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:40,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071236225] [2022-11-03 04:06:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:40,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:40,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:40,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071236225] [2022-11-03 04:06:40,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071236225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:40,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:06:40,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:06:40,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575916064] [2022-11-03 04:06:40,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:40,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:06:40,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:40,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:06:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:40,922 INFO L87 Difference]: Start difference. First operand 374 states and 536 transitions. 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) [2022-11-03 04:06:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:42,150 INFO L93 Difference]: Finished difference Result 911 states and 1259 transitions. [2022-11-03 04:06:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:06:42,151 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 [2022-11-03 04:06:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:42,155 INFO L225 Difference]: With dead ends: 911 [2022-11-03 04:06:42,156 INFO L226 Difference]: Without dead ends: 445 [2022-11-03 04:06:42,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:06:42,160 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 954 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:42,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1178 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:06:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-03 04:06:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 360. [2022-11-03 04:06:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 268 states have (on average 1.4104477611940298) internal successors, (378), 273 states have internal predecessors, (378), 63 states have call successors, (63), 29 states have call predecessors, (63), 27 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-03 04:06:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 500 transitions. [2022-11-03 04:06:42,208 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 500 transitions. Word has length 45 [2022-11-03 04:06:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:42,208 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 500 transitions. [2022-11-03 04:06:42,209 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) [2022-11-03 04:06:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 500 transitions. [2022-11-03 04:06:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 04:06:42,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:42,211 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] [2022-11-03 04:06:42,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:06:42,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash -96222000, now seen corresponding path program 1 times [2022-11-03 04:06:42,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:42,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743004834] [2022-11-03 04:06:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:42,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:42,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743004834] [2022-11-03 04:06:42,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743004834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:42,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:06:42,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:06:42,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031126716] [2022-11-03 04:06:42,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:06:42,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:42,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:06:42,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:06:42,563 INFO L87 Difference]: Start difference. First operand 360 states and 500 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) [2022-11-03 04:06:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:43,670 INFO L93 Difference]: Finished difference Result 662 states and 868 transitions. [2022-11-03 04:06:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 04:06:43,670 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 [2022-11-03 04:06:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:43,675 INFO L225 Difference]: With dead ends: 662 [2022-11-03 04:06:43,676 INFO L226 Difference]: Without dead ends: 488 [2022-11-03 04:06:43,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:06:43,687 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 535 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:43,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 1185 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:06:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-03 04:06:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 462. [2022-11-03 04:06:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 336 states have (on average 1.369047619047619) internal successors, (460), 341 states have internal predecessors, (460), 83 states have call successors, (83), 43 states have call predecessors, (83), 41 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-03 04:06:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 622 transitions. [2022-11-03 04:06:43,780 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 622 transitions. Word has length 46 [2022-11-03 04:06:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:43,781 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 622 transitions. [2022-11-03 04:06:43,781 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) [2022-11-03 04:06:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 622 transitions. [2022-11-03 04:06:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 04:06:43,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:43,784 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] [2022-11-03 04:06:43,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:06:43,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1154170382, now seen corresponding path program 1 times [2022-11-03 04:06:43,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:43,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81145280] [2022-11-03 04:06:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:43,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:43,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:43,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81145280] [2022-11-03 04:06:43,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81145280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:43,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:06:43,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:06:43,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384214579] [2022-11-03 04:06:43,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:43,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:06:43,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:43,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:06:43,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:06:43,849 INFO L87 Difference]: Start difference. First operand 462 states and 622 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) [2022-11-03 04:06:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:44,000 INFO L93 Difference]: Finished difference Result 727 states and 958 transitions. [2022-11-03 04:06:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:06:44,001 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 [2022-11-03 04:06:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:44,003 INFO L225 Difference]: With dead ends: 727 [2022-11-03 04:06:44,003 INFO L226 Difference]: Without dead ends: 181 [2022-11-03 04:06:44,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:06:44,015 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 347 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:44,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 300 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:06:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-03 04:06:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-11-03 04:06:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 147 states have (on average 1.530612244897959) internal successors, (225), 149 states have internal predecessors, (225), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-03 04:06:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 277 transitions. [2022-11-03 04:06:44,043 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 277 transitions. Word has length 47 [2022-11-03 04:06:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:44,045 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 277 transitions. [2022-11-03 04:06:44,046 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) [2022-11-03 04:06:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 277 transitions. [2022-11-03 04:06:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 04:06:44,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:44,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:44,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:06:44,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1655544255, now seen corresponding path program 1 times [2022-11-03 04:06:44,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:44,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642579828] [2022-11-03 04:06:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:44,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:44,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642579828] [2022-11-03 04:06:44,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642579828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:44,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:06:44,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:06:44,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802333525] [2022-11-03 04:06:44,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:44,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:06:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:44,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:06:44,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:06:44,299 INFO L87 Difference]: Start difference. First operand 181 states and 277 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 04:06:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:45,399 INFO L93 Difference]: Finished difference Result 1014 states and 1655 transitions. [2022-11-03 04:06:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:06:45,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-11-03 04:06:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:45,414 INFO L225 Difference]: With dead ends: 1014 [2022-11-03 04:06:45,415 INFO L226 Difference]: Without dead ends: 839 [2022-11-03 04:06:45,416 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 [2022-11-03 04:06:45,420 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 1243 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:45,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1276 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:06:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-03 04:06:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 826. [2022-11-03 04:06:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 687 states have (on average 1.526928675400291) internal successors, (1049), 692 states have internal predecessors, (1049), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (164), 103 states have call predecessors, (164), 106 states have call successors, (164) [2022-11-03 04:06:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1321 transitions. [2022-11-03 04:06:45,631 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1321 transitions. Word has length 65 [2022-11-03 04:06:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:45,631 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1321 transitions. [2022-11-03 04:06:45,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 04:06:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1321 transitions. [2022-11-03 04:06:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 04:06:45,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:45,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:45,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:06:45,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2034024163, now seen corresponding path program 1 times [2022-11-03 04:06:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:45,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156361661] [2022-11-03 04:06:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:45,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:06:45,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:45,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156361661] [2022-11-03 04:06:45,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156361661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:45,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462296455] [2022-11-03 04:06:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:45,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:45,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:45,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:06:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:06:46,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:06:46,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:06:46,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462296455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:46,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:06:46,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:06:46,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247995746] [2022-11-03 04:06:46,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:46,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:06:46,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:06:46,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:46,358 INFO L87 Difference]: Start difference. First operand 826 states and 1321 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:46,804 INFO L93 Difference]: Finished difference Result 2450 states and 4036 transitions. [2022-11-03 04:06:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:06:46,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 04:06:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:46,816 INFO L225 Difference]: With dead ends: 2450 [2022-11-03 04:06:46,817 INFO L226 Difference]: Without dead ends: 1630 [2022-11-03 04:06:46,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:46,822 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 225 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:46,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:06:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2022-11-03 04:06:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1621. [2022-11-03 04:06:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1355 states have (on average 1.5232472324723247) internal successors, (2064), 1363 states have internal predecessors, (2064), 205 states have call successors, (205), 61 states have call predecessors, (205), 60 states have return successors, (315), 197 states have call predecessors, (315), 203 states have call successors, (315) [2022-11-03 04:06:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2584 transitions. [2022-11-03 04:06:47,015 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2584 transitions. Word has length 130 [2022-11-03 04:06:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:47,016 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2584 transitions. [2022-11-03 04:06:47,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2584 transitions. [2022-11-03 04:06:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 04:06:47,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:47,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:47,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:47,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:47,260 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:47,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:47,260 INFO L85 PathProgramCache]: Analyzing trace with hash -420048159, now seen corresponding path program 1 times [2022-11-03 04:06:47,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:47,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586174864] [2022-11-03 04:06:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:47,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:06:47,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586174864] [2022-11-03 04:06:47,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586174864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497455866] [2022-11-03 04:06:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:47,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:47,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:47,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:47,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:06:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:47,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:06:47,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:06:47,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:06:47,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497455866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:47,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:06:47,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:06:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918883327] [2022-11-03 04:06:47,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:47,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:06:47,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:06:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:47,945 INFO L87 Difference]: Start difference. First operand 1621 states and 2584 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:48,399 INFO L93 Difference]: Finished difference Result 4820 states and 7908 transitions. [2022-11-03 04:06:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:06:48,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 04:06:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:48,422 INFO L225 Difference]: With dead ends: 4820 [2022-11-03 04:06:48,423 INFO L226 Difference]: Without dead ends: 3205 [2022-11-03 04:06:48,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:48,435 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 246 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:48,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:06:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2022-11-03 04:06:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 3191. [2022-11-03 04:06:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2676 states have (on average 1.5186846038863977) internal successors, (4064), 2690 states have internal predecessors, (4064), 394 states have call successors, (394), 121 states have call predecessors, (394), 120 states have return successors, (608), 380 states have call predecessors, (608), 392 states have call successors, (608) [2022-11-03 04:06:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 5066 transitions. [2022-11-03 04:06:48,780 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 5066 transitions. Word has length 130 [2022-11-03 04:06:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:48,783 INFO L495 AbstractCegarLoop]: Abstraction has 3191 states and 5066 transitions. [2022-11-03 04:06:48,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 5066 transitions. [2022-11-03 04:06:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 04:06:48,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:48,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:48,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:48,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:49,000 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash 677235107, now seen corresponding path program 1 times [2022-11-03 04:06:49,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479931054] [2022-11-03 04:06:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:06:49,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:49,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479931054] [2022-11-03 04:06:49,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479931054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:49,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636545006] [2022-11-03 04:06:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:49,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:49,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:49,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:49,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:06:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:49,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:06:49,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 04:06:49,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:06:49,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636545006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:49,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:06:49,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:06:49,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904588372] [2022-11-03 04:06:49,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:49,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:06:49,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:49,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:06:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:49,679 INFO L87 Difference]: Start difference. First operand 3191 states and 5066 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:50,375 INFO L93 Difference]: Finished difference Result 9500 states and 15511 transitions. [2022-11-03 04:06:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:06:50,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 04:06:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:50,425 INFO L225 Difference]: With dead ends: 9500 [2022-11-03 04:06:50,425 INFO L226 Difference]: Without dead ends: 6315 [2022-11-03 04:06:50,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:50,486 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 249 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:50,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:06:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2022-11-03 04:06:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6291. [2022-11-03 04:06:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6291 states, 5288 states have (on average 1.5136157337367624) internal successors, (8004), 5314 states have internal predecessors, (8004), 762 states have call successors, (762), 241 states have call predecessors, (762), 240 states have return successors, (1176), 736 states have call predecessors, (1176), 760 states have call successors, (1176) [2022-11-03 04:06:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6291 states to 6291 states and 9942 transitions. [2022-11-03 04:06:51,129 INFO L78 Accepts]: Start accepts. Automaton has 6291 states and 9942 transitions. Word has length 130 [2022-11-03 04:06:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:51,130 INFO L495 AbstractCegarLoop]: Abstraction has 6291 states and 9942 transitions. [2022-11-03 04:06:51,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6291 states and 9942 transitions. [2022-11-03 04:06:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 04:06:51,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:51,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:51,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:51,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:51,356 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash 846922657, now seen corresponding path program 1 times [2022-11-03 04:06:51,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337414277] [2022-11-03 04:06:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:51,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:06:51,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:51,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337414277] [2022-11-03 04:06:51,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337414277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:51,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872120710] [2022-11-03 04:06:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:51,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:51,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:51,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:06:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:52,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:06:52,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:06:52,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:06:52,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872120710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:52,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:06:52,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:06:52,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566773764] [2022-11-03 04:06:52,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:52,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:06:52,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:06:52,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:52,152 INFO L87 Difference]: Start difference. First operand 6291 states and 9942 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:53,417 INFO L93 Difference]: Finished difference Result 18740 states and 30435 transitions. [2022-11-03 04:06:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:06:53,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 04:06:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:53,545 INFO L225 Difference]: With dead ends: 18740 [2022-11-03 04:06:53,545 INFO L226 Difference]: Without dead ends: 12455 [2022-11-03 04:06:53,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:53,592 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 240 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:53,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:06:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2022-11-03 04:06:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 12411. [2022-11-03 04:06:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12411 states, 10452 states have (on average 1.5082280903176426) internal successors, (15764), 10502 states have internal predecessors, (15764), 1478 states have call successors, (1478), 481 states have call predecessors, (1478), 480 states have return successors, (2276), 1428 states have call predecessors, (2276), 1476 states have call successors, (2276) [2022-11-03 04:06:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 19518 transitions. [2022-11-03 04:06:55,172 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 19518 transitions. Word has length 130 [2022-11-03 04:06:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:55,173 INFO L495 AbstractCegarLoop]: Abstraction has 12411 states and 19518 transitions. [2022-11-03 04:06:55,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 19518 transitions. [2022-11-03 04:06:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 04:06:55,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:55,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:55,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:55,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:55,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2076511261, now seen corresponding path program 1 times [2022-11-03 04:06:55,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:55,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247950238] [2022-11-03 04:06:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:06:55,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:55,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247950238] [2022-11-03 04:06:55,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247950238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:55,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937461179] [2022-11-03 04:06:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:55,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:55,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:55,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:55,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:06:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:55,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:06:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 04:06:55,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:06:55,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937461179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:55,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:06:55,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:06:55,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915835314] [2022-11-03 04:06:55,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:55,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:06:55,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:55,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:06:55,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:55,956 INFO L87 Difference]: Start difference. First operand 12411 states and 19518 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:06:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:57,913 INFO L93 Difference]: Finished difference Result 36980 states and 59719 transitions. [2022-11-03 04:06:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:06:57,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 04:06:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:58,065 INFO L225 Difference]: With dead ends: 36980 [2022-11-03 04:06:58,065 INFO L226 Difference]: Without dead ends: 24575 [2022-11-03 04:06:58,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:06:58,135 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 234 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:58,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:06:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24575 states. [2022-11-03 04:07:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24575 to 24491. [2022-11-03 04:07:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24491 states, 20660 states have (on average 1.5026137463697966) internal successors, (31044), 20758 states have internal predecessors, (31044), 2870 states have call successors, (2870), 961 states have call predecessors, (2870), 960 states have return successors, (4404), 2772 states have call predecessors, (4404), 2868 states have call successors, (4404) [2022-11-03 04:07:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24491 states to 24491 states and 38318 transitions. [2022-11-03 04:07:00,877 INFO L78 Accepts]: Start accepts. Automaton has 24491 states and 38318 transitions. Word has length 130 [2022-11-03 04:07:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:00,877 INFO L495 AbstractCegarLoop]: Abstraction has 24491 states and 38318 transitions. [2022-11-03 04:07:00,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:07:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 24491 states and 38318 transitions. [2022-11-03 04:07:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 04:07:00,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:00,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:00,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 04:07:01,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1606204837, now seen corresponding path program 1 times [2022-11-03 04:07:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:01,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125242175] [2022-11-03 04:07:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:07:01,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125242175] [2022-11-03 04:07:01,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125242175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327088093] [2022-11-03 04:07:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:01,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:01,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:01,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:01,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:07:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:07:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:07:01,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:01,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327088093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:01,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:01,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:07:01,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870373143] [2022-11-03 04:07:01,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:01,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:01,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:07:01,989 INFO L87 Difference]: Start difference. First operand 24491 states and 38318 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:07:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:05,043 INFO L93 Difference]: Finished difference Result 72980 states and 117159 transitions. [2022-11-03 04:07:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:05,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-03 04:07:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:05,326 INFO L225 Difference]: With dead ends: 72980 [2022-11-03 04:07:05,326 INFO L226 Difference]: Without dead ends: 48495 [2022-11-03 04:07:05,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:07:05,430 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 228 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:05,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48495 states. [2022-11-03 04:07:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48495 to 48331. [2022-11-03 04:07:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48331 states, 40836 states have (on average 1.4968165344304045) internal successors, (61124), 41030 states have internal predecessors, (61124), 5574 states have call successors, (5574), 1921 states have call predecessors, (5574), 1920 states have return successors, (8516), 5380 states have call predecessors, (8516), 5572 states have call successors, (8516) [2022-11-03 04:07:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48331 states to 48331 states and 75214 transitions. [2022-11-03 04:07:09,356 INFO L78 Accepts]: Start accepts. Automaton has 48331 states and 75214 transitions. Word has length 130 [2022-11-03 04:07:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:09,357 INFO L495 AbstractCegarLoop]: Abstraction has 48331 states and 75214 transitions. [2022-11-03 04:07:09,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:07:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 48331 states and 75214 transitions. [2022-11-03 04:07:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 04:07:09,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:09,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:09,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 04:07:09,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd6bf59-d1f3-4ed3-9620-2c5282596f9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 04:07:09,953 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:09,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1270972647, now seen corresponding path program 1 times [2022-11-03 04:07:09,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:09,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270495776] [2022-11-03 04:07:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:09,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 04:07:10,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:10,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270495776] [2022-11-03 04:07:10,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270495776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:10,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:10,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:07:10,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756136746] [2022-11-03 04:07:10,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:10,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:07:10,621 INFO L87 Difference]: Start difference. First operand 48331 states and 75214 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:07:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:18,985 INFO L93 Difference]: Finished difference Result 166099 states and 260245 transitions. [2022-11-03 04:07:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:18,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-03 04:07:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:20,179 INFO L225 Difference]: With dead ends: 166099 [2022-11-03 04:07:20,180 INFO L226 Difference]: Without dead ends: 117775 [2022-11-03 04:07:20,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:20,402 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 970 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:20,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 814 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:07:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117775 states. [2022-11-03 04:07:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117775 to 94731. [2022-11-03 04:07:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94731 states, 80068 states have (on average 1.490782834590598) internal successors, (119364), 80454 states have internal predecessors, (119364), 10822 states have call successors, (10822), 3841 states have call predecessors, (10822), 3840 states have return successors, (16452), 10436 states have call predecessors, (16452), 10820 states have call successors, (16452) [2022-11-03 04:07:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94731 states to 94731 states and 146638 transitions. [2022-11-03 04:07:28,735 INFO L78 Accepts]: Start accepts. Automaton has 94731 states and 146638 transitions. Word has length 130 [2022-11-03 04:07:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:28,736 INFO L495 AbstractCegarLoop]: Abstraction has 94731 states and 146638 transitions. [2022-11-03 04:07:28,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:07:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 94731 states and 146638 transitions. [2022-11-03 04:07:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 04:07:28,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:28,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:28,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 04:07:28,852 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash -587120359, now seen corresponding path program 1 times [2022-11-03 04:07:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:28,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43606628] [2022-11-03 04:07:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 04:07:29,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:29,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43606628] [2022-11-03 04:07:29,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43606628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:29,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:29,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:07:29,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519865177] [2022-11-03 04:07:29,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:29,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:29,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:29,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:29,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:07:29,475 INFO L87 Difference]: Start difference. First operand 94731 states and 146638 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)