./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh --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 ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f --- 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-2329fc7 [2022-12-14 08:08:36,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:08:36,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:08:36,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:08:36,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:08:36,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:08:36,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:08:36,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:08:36,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:08:36,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:08:36,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:08:36,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:08:36,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:08:36,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:08:36,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:08:36,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:08:36,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:08:36,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:08:36,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:08:36,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:08:36,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:08:36,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:08:36,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:08:36,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:08:36,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:08:36,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:08:36,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:08:36,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:08:36,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:08:36,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:08:36,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:08:36,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:08:36,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:08:36,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:08:36,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:08:36,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:08:36,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:08:36,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:08:36,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:08:36,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:08:36,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:08:36,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:08:36,346 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:08:36,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:08:36,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:08:36,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:08:36,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:08:36,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:08:36,348 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:08:36,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:08:36,348 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:08:36,348 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:08:36,348 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:08:36,349 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:08:36,349 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:08:36,349 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:08:36,349 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:08:36,349 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:08:36,350 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:08:36,350 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:08:36,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:08:36,350 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:08:36,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:08:36,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:08:36,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:08:36,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:08:36,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:08:36,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:08:36,351 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:08:36,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:08:36,352 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:08:36,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:08:36,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:08:36,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:08:36,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:08:36,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:08:36,353 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:08:36,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:08:36,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:08:36,353 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:08:36,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:08:36,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:08:36,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:08:36,354 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_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f [2022-12-14 08:08:36,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:08:36,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:08:36,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:08:36,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:08:36,557 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:08:36,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-12-14 08:08:39,202 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:08:39,387 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:08:39,387 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-12-14 08:08:39,403 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/data/8351584a0/1270cbea552140ab930085459bbce4c3/FLAG3f059f63e [2022-12-14 08:08:39,418 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/data/8351584a0/1270cbea552140ab930085459bbce4c3 [2022-12-14 08:08:39,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:08:39,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:08:39,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:08:39,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:08:39,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:08:39,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3221de05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39, skipping insertion in model container [2022-12-14 08:08:39,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:08:39,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:08:39,580 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2022-12-14 08:08:39,624 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2022-12-14 08:08:39,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:08:39,720 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:08:39,729 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2022-12-14 08:08:39,746 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2022-12-14 08:08:39,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:08:39,822 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:08:39,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39 WrapperNode [2022-12-14 08:08:39,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:08:39,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:08:39,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:08:39,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:08:39,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,873 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1103 [2022-12-14 08:08:39,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:08:39,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:08:39,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:08:39,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:08:39,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,907 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:08:39,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:08:39,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:08:39,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:08:39,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (1/1) ... [2022-12-14 08:08:39,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:08:39,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:39,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:08:39,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:08:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:08:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 08:08:39,981 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 08:08:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 08:08:39,981 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 08:08:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 08:08:39,981 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 08:08:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 08:08:39,981 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 08:08:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 08:08:39,982 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 08:08:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 08:08:39,982 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 08:08:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 08:08:39,982 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 08:08:39,982 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 08:08:39,982 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 08:08:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 08:08:39,983 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 08:08:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 08:08:39,983 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 08:08:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 08:08:39,983 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 08:08:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:08:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 08:08:39,984 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 08:08:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 08:08:39,984 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 08:08:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:08:39,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:08:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 08:08:39,985 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 08:08:39,985 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 08:08:39,985 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 08:08:40,101 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:08:40,103 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:08:40,791 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:08:41,167 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:08:41,168 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-12-14 08:08:41,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:08:41 BoogieIcfgContainer [2022-12-14 08:08:41,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:08:41,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:08:41,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:08:41,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:08:41,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:08:39" (1/3) ... [2022-12-14 08:08:41,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cc073a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:08:41, skipping insertion in model container [2022-12-14 08:08:41,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:39" (2/3) ... [2022-12-14 08:08:41,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cc073a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:08:41, skipping insertion in model container [2022-12-14 08:08:41,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:08:41" (3/3) ... [2022-12-14 08:08:41,180 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-12-14 08:08:41,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:08:41,200 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 08:08:41,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:08:41,247 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;@71c72645, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:08:41,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 08:08:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 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) [2022-12-14 08:08:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 08:08:41,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:41,261 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] [2022-12-14 08:08:41,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:41,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1409772883, now seen corresponding path program 1 times [2022-12-14 08:08:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:41,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151295882] [2022-12-14 08:08:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:41,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:41,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151295882] [2022-12-14 08:08:41,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151295882] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:41,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:08:41,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:08:41,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403773275] [2022-12-14 08:08:41,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:08:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:08:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:08:41,526 INFO L87 Difference]: Start difference. First operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 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 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-12-14 08:08:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:41,896 INFO L93 Difference]: Finished difference Result 604 states and 913 transitions. [2022-12-14 08:08:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:08:41,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2022-12-14 08:08:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:41,906 INFO L225 Difference]: With dead ends: 604 [2022-12-14 08:08:41,906 INFO L226 Difference]: Without dead ends: 331 [2022-12-14 08:08:41,909 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 [2022-12-14 08:08:41,912 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 467 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:41,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 688 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:08:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-12-14 08:08:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2022-12-14 08:08:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 251 states have (on average 1.4661354581673307) internal successors, (368), 256 states have internal predecessors, (368), 51 states have call successors, (51), 22 states have call predecessors, (51), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-12-14 08:08:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 466 transitions. [2022-12-14 08:08:41,964 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 466 transitions. Word has length 45 [2022-12-14 08:08:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:41,964 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 466 transitions. [2022-12-14 08:08:41,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-12-14 08:08:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 466 transitions. [2022-12-14 08:08:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 08:08:41,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:41,966 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] [2022-12-14 08:08:41,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:08:41,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:41,967 INFO L85 PathProgramCache]: Analyzing trace with hash -490798260, now seen corresponding path program 1 times [2022-12-14 08:08:41,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:41,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839867580] [2022-12-14 08:08:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:41,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:42,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:42,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839867580] [2022-12-14 08:08:42,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839867580] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:42,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:08:42,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:08:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462623464] [2022-12-14 08:08:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:42,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:08:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:42,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:08:42,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:08:42,076 INFO L87 Difference]: Start difference. First operand 324 states and 466 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) [2022-12-14 08:08:42,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:42,665 INFO L93 Difference]: Finished difference Result 726 states and 969 transitions. [2022-12-14 08:08:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:08:42,665 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 [2022-12-14 08:08:42,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:42,670 INFO L225 Difference]: With dead ends: 726 [2022-12-14 08:08:42,670 INFO L226 Difference]: Without dead ends: 594 [2022-12-14 08:08:42,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:08:42,672 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 952 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:42,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 1206 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:08:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-12-14 08:08:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 510. [2022-12-14 08:08:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 383 states have (on average 1.3785900783289817) internal successors, (528), 389 states have internal predecessors, (528), 78 states have call successors, (78), 45 states have call predecessors, (78), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2022-12-14 08:08:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2022-12-14 08:08:42,708 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 45 [2022-12-14 08:08:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:42,708 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2022-12-14 08:08:42,708 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) [2022-12-14 08:08:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2022-12-14 08:08:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 08:08:42,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:42,709 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] [2022-12-14 08:08:42,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:08:42,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:42,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1316401693, now seen corresponding path program 1 times [2022-12-14 08:08:42,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:42,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315167839] [2022-12-14 08:08:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:42,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:42,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315167839] [2022-12-14 08:08:42,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315167839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:42,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:08:42,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 08:08:42,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181289791] [2022-12-14 08:08:42,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:42,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:08:42,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:42,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:08:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:08:42,856 INFO L87 Difference]: Start difference. First operand 510 states and 684 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) [2022-12-14 08:08:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:43,477 INFO L93 Difference]: Finished difference Result 1026 states and 1300 transitions. [2022-12-14 08:08:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:08:43,478 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 [2022-12-14 08:08:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:43,482 INFO L225 Difference]: With dead ends: 1026 [2022-12-14 08:08:43,482 INFO L226 Difference]: Without dead ends: 724 [2022-12-14 08:08:43,484 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 [2022-12-14 08:08:43,485 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 566 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:43,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 1196 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:08:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-12-14 08:08:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 689. [2022-12-14 08:08:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 508 states have (on average 1.3385826771653544) internal successors, (680), 515 states have internal predecessors, (680), 105 states have call successors, (105), 68 states have call predecessors, (105), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2022-12-14 08:08:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 894 transitions. [2022-12-14 08:08:43,548 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 894 transitions. Word has length 46 [2022-12-14 08:08:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:43,548 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 894 transitions. [2022-12-14 08:08:43,548 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) [2022-12-14 08:08:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 894 transitions. [2022-12-14 08:08:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 08:08:43,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:43,550 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] [2022-12-14 08:08:43,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:08:43,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:43,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:43,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1471315852, now seen corresponding path program 1 times [2022-12-14 08:08:43,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:43,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133408269] [2022-12-14 08:08:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:43,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:43,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:43,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133408269] [2022-12-14 08:08:43,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133408269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:43,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:08:43,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:08:43,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836407735] [2022-12-14 08:08:43,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:43,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:08:43,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:08:43,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:08:43,602 INFO L87 Difference]: Start difference. First operand 689 states and 894 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) [2022-12-14 08:08:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:43,738 INFO L93 Difference]: Finished difference Result 1253 states and 1564 transitions. [2022-12-14 08:08:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:08:43,739 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 [2022-12-14 08:08:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:43,743 INFO L225 Difference]: With dead ends: 1253 [2022-12-14 08:08:43,743 INFO L226 Difference]: Without dead ends: 821 [2022-12-14 08:08:43,745 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 [2022-12-14 08:08:43,746 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 67 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:43,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 664 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:08:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-12-14 08:08:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 716. [2022-12-14 08:08:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 531 states have (on average 1.3276836158192091) internal successors, (705), 538 states have internal predecessors, (705), 107 states have call successors, (107), 70 states have call predecessors, (107), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2022-12-14 08:08:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 923 transitions. [2022-12-14 08:08:43,803 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 923 transitions. Word has length 47 [2022-12-14 08:08:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:43,803 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 923 transitions. [2022-12-14 08:08:43,803 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) [2022-12-14 08:08:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 923 transitions. [2022-12-14 08:08:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 08:08:43,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:43,806 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:43,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:08:43,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1574837551, now seen corresponding path program 1 times [2022-12-14 08:08:43,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:43,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132513380] [2022-12-14 08:08:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:43,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:08:43,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:43,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132513380] [2022-12-14 08:08:43,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132513380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:43,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:08:43,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:08:43,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61056926] [2022-12-14 08:08:43,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:43,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:08:43,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:43,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:08:43,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:08:43,868 INFO L87 Difference]: Start difference. First operand 716 states and 923 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:08:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:43,992 INFO L93 Difference]: Finished difference Result 906 states and 1144 transitions. [2022-12-14 08:08:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:08:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-12-14 08:08:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:43,996 INFO L225 Difference]: With dead ends: 906 [2022-12-14 08:08:43,996 INFO L226 Difference]: Without dead ends: 633 [2022-12-14 08:08:43,997 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 [2022-12-14 08:08:43,998 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 372 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:43,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 410 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:08:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-12-14 08:08:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 524. [2022-12-14 08:08:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 391 states have (on average 1.3375959079283888) internal successors, (523), 396 states have internal predecessors, (523), 83 states have call successors, (83), 50 states have call predecessors, (83), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-12-14 08:08:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 685 transitions. [2022-12-14 08:08:44,038 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 685 transitions. Word has length 53 [2022-12-14 08:08:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:44,038 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 685 transitions. [2022-12-14 08:08:44,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:08:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 685 transitions. [2022-12-14 08:08:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 08:08:44,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:44,040 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:44,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:08:44,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:44,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1949981825, now seen corresponding path program 1 times [2022-12-14 08:08:44,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:44,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935345330] [2022-12-14 08:08:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:44,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:44,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935345330] [2022-12-14 08:08:44,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935345330] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:44,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:08:44,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:08:44,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129440235] [2022-12-14 08:08:44,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:44,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:08:44,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:08:44,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:08:44,133 INFO L87 Difference]: Start difference. First operand 524 states and 685 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 08:08:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:44,405 INFO L93 Difference]: Finished difference Result 627 states and 801 transitions. [2022-12-14 08:08:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:08:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-12-14 08:08:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:44,407 INFO L225 Difference]: With dead ends: 627 [2022-12-14 08:08:44,407 INFO L226 Difference]: Without dead ends: 624 [2022-12-14 08:08:44,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:08:44,408 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 673 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:44,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 386 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:08:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-12-14 08:08:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 523. [2022-12-14 08:08:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 391 states have (on average 1.329923273657289) internal successors, (520), 395 states have internal predecessors, (520), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-12-14 08:08:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 681 transitions. [2022-12-14 08:08:44,439 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 681 transitions. Word has length 54 [2022-12-14 08:08:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:44,440 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 681 transitions. [2022-12-14 08:08:44,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 08:08:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 681 transitions. [2022-12-14 08:08:44,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 08:08:44,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:44,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:44,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:08:44,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash 318359517, now seen corresponding path program 1 times [2022-12-14 08:08:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:44,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402589191] [2022-12-14 08:08:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:44,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:44,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402589191] [2022-12-14 08:08:44,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402589191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:08:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468293656] [2022-12-14 08:08:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:44,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:44,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:44,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:08:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:44,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:08:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:44,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:08:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:45,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468293656] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:45,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730001437] [2022-12-14 08:08:45,053 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 08:08:45,053 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:08:45,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:08:45,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:08:45,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:08:50,457 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 215 for LOIs [2022-12-14 08:08:50,489 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-12-14 08:08:50,506 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 211 for LOIs [2022-12-14 08:08:50,532 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 219 for LOIs [2022-12-14 08:08:51,190 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2022-12-14 08:08:51,278 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 215 for LOIs [2022-12-14 08:08:51,362 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 215 for LOIs [2022-12-14 08:08:51,392 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 222 for LOIs [2022-12-14 08:08:51,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:12,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12910#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:09:12,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:12,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:12,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 08:09:12,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460280645] [2022-12-14 08:09:12,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:12,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:09:12,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:09:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 08:09:12,248 INFO L87 Difference]: Start difference. First operand 523 states and 681 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 08:09:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:12,681 INFO L93 Difference]: Finished difference Result 1096 states and 1336 transitions. [2022-12-14 08:09:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:09:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-12-14 08:09:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:12,684 INFO L225 Difference]: With dead ends: 1096 [2022-12-14 08:09:12,684 INFO L226 Difference]: Without dead ends: 1093 [2022-12-14 08:09:12,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 08:09:12,686 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 615 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:12,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1211 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-12-14 08:09:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 818. [2022-12-14 08:09:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 596 states have (on average 1.2802013422818792) internal successors, (763), 600 states have internal predecessors, (763), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-14 08:09:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1020 transitions. [2022-12-14 08:09:12,772 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1020 transitions. Word has length 55 [2022-12-14 08:09:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:12,773 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1020 transitions. [2022-12-14 08:09:12,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 08:09:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1020 transitions. [2022-12-14 08:09:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 08:09:12,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:12,775 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:12,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:09:12,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:12,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash -761885183, now seen corresponding path program 2 times [2022-12-14 08:09:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102254656] [2022-12-14 08:09:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:09:13,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:13,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102254656] [2022-12-14 08:09:13,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102254656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:13,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:13,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:09:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330080917] [2022-12-14 08:09:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:13,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:13,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:13,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:13,010 INFO L87 Difference]: Start difference. First operand 818 states and 1020 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 08:09:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:13,185 INFO L93 Difference]: Finished difference Result 1231 states and 1493 transitions. [2022-12-14 08:09:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-12-14 08:09:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:13,191 INFO L225 Difference]: With dead ends: 1231 [2022-12-14 08:09:13,191 INFO L226 Difference]: Without dead ends: 820 [2022-12-14 08:09:13,192 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 [2022-12-14 08:09:13,193 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 375 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:13,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 443 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-12-14 08:09:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 814. [2022-12-14 08:09:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 592 states have (on average 1.2685810810810811) internal successors, (751), 596 states have internal predecessors, (751), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-14 08:09:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1008 transitions. [2022-12-14 08:09:13,272 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1008 transitions. Word has length 58 [2022-12-14 08:09:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:13,272 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1008 transitions. [2022-12-14 08:09:13,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 08:09:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1008 transitions. [2022-12-14 08:09:13,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 08:09:13,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:13,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:13,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:09:13,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 963636709, now seen corresponding path program 1 times [2022-12-14 08:09:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:13,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277449083] [2022-12-14 08:09:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:09:13,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:13,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277449083] [2022-12-14 08:09:13,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277449083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:13,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:13,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:09:13,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600909667] [2022-12-14 08:09:13,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:13,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:13,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:13,312 INFO L87 Difference]: Start difference. First operand 814 states and 1008 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:09:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:13,515 INFO L93 Difference]: Finished difference Result 1433 states and 1718 transitions. [2022-12-14 08:09:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-12-14 08:09:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:13,518 INFO L225 Difference]: With dead ends: 1433 [2022-12-14 08:09:13,519 INFO L226 Difference]: Without dead ends: 1070 [2022-12-14 08:09:13,519 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 [2022-12-14 08:09:13,520 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 42 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:13,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 700 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-12-14 08:09:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 889. [2022-12-14 08:09:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 653 states have (on average 1.2649310872894335) internal successors, (826), 657 states have internal predecessors, (826), 137 states have call successors, (137), 99 states have call predecessors, (137), 97 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2022-12-14 08:09:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1097 transitions. [2022-12-14 08:09:13,591 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1097 transitions. Word has length 61 [2022-12-14 08:09:13,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:13,591 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1097 transitions. [2022-12-14 08:09:13,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:09:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1097 transitions. [2022-12-14 08:09:13,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 08:09:13,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:13,592 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:13,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:09:13,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:13,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:13,593 INFO L85 PathProgramCache]: Analyzing trace with hash 261702640, now seen corresponding path program 1 times [2022-12-14 08:09:13,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:13,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510665424] [2022-12-14 08:09:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:13,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:09:13,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:13,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510665424] [2022-12-14 08:09:13,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510665424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:13,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:13,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 08:09:13,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969570403] [2022-12-14 08:09:13,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:13,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:09:13,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:13,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:09:13,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:09:13,731 INFO L87 Difference]: Start difference. First operand 889 states and 1097 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:09:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:14,508 INFO L93 Difference]: Finished difference Result 1938 states and 2280 transitions. [2022-12-14 08:09:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:09:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-12-14 08:09:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:14,514 INFO L225 Difference]: With dead ends: 1938 [2022-12-14 08:09:14,514 INFO L226 Difference]: Without dead ends: 1257 [2022-12-14 08:09:14,515 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 [2022-12-14 08:09:14,516 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 548 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:14,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1013 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:09:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-12-14 08:09:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1208. [2022-12-14 08:09:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 867 states have (on average 1.2249134948096885) internal successors, (1062), 871 states have internal predecessors, (1062), 193 states have call successors, (193), 148 states have call predecessors, (193), 146 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-12-14 08:09:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1445 transitions. [2022-12-14 08:09:14,670 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1445 transitions. Word has length 70 [2022-12-14 08:09:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:14,670 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1445 transitions. [2022-12-14 08:09:14,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:09:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1445 transitions. [2022-12-14 08:09:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 08:09:14,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:14,672 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:14,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:09:14,672 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:14,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1484157124, now seen corresponding path program 1 times [2022-12-14 08:09:14,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:14,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443093254] [2022-12-14 08:09:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:14,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:09:14,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443093254] [2022-12-14 08:09:14,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443093254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:14,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:14,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:09:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419024236] [2022-12-14 08:09:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:14,729 INFO L87 Difference]: Start difference. First operand 1208 states and 1445 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:09:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:14,975 INFO L93 Difference]: Finished difference Result 2174 states and 2539 transitions. [2022-12-14 08:09:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-12-14 08:09:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:14,980 INFO L225 Difference]: With dead ends: 2174 [2022-12-14 08:09:14,980 INFO L226 Difference]: Without dead ends: 1384 [2022-12-14 08:09:14,982 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 [2022-12-14 08:09:14,982 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 37 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:14,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 694 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-12-14 08:09:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1255. [2022-12-14 08:09:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 906 states have (on average 1.2229580573951435) internal successors, (1108), 910 states have internal predecessors, (1108), 197 states have call successors, (197), 152 states have call predecessors, (197), 150 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2022-12-14 08:09:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1499 transitions. [2022-12-14 08:09:15,085 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1499 transitions. Word has length 71 [2022-12-14 08:09:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:15,085 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1499 transitions. [2022-12-14 08:09:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:09:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1499 transitions. [2022-12-14 08:09:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 08:09:15,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:15,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:15,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:09:15,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:15,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1537023630, now seen corresponding path program 1 times [2022-12-14 08:09:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:15,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302254533] [2022-12-14 08:09:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:09:15,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:15,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302254533] [2022-12-14 08:09:15,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302254533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:15,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:15,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:09:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116321050] [2022-12-14 08:09:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:15,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:09:15,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:09:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:09:15,195 INFO L87 Difference]: Start difference. First operand 1255 states and 1499 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2022-12-14 08:09:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:16,175 INFO L93 Difference]: Finished difference Result 2198 states and 3071 transitions. [2022-12-14 08:09:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:09:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 71 [2022-12-14 08:09:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:16,180 INFO L225 Difference]: With dead ends: 2198 [2022-12-14 08:09:16,180 INFO L226 Difference]: Without dead ends: 2001 [2022-12-14 08:09:16,182 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 [2022-12-14 08:09:16,182 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 1553 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:16,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1571 Valid, 1577 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:09:16,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-12-14 08:09:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1988. [2022-12-14 08:09:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1526 states have (on average 1.3499344692005242) internal successors, (2060), 1533 states have internal predecessors, (2060), 286 states have call successors, (286), 176 states have call predecessors, (286), 174 states have return successors, (349), 280 states have call predecessors, (349), 283 states have call successors, (349) [2022-12-14 08:09:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2695 transitions. [2022-12-14 08:09:16,335 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2695 transitions. Word has length 71 [2022-12-14 08:09:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:16,335 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2695 transitions. [2022-12-14 08:09:16,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2022-12-14 08:09:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2695 transitions. [2022-12-14 08:09:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 08:09:16,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:16,337 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:09:16,337 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1978291160, now seen corresponding path program 1 times [2022-12-14 08:09:16,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:16,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666576571] [2022-12-14 08:09:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:16,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 08:09:16,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:16,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666576571] [2022-12-14 08:09:16,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666576571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:16,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131842796] [2022-12-14 08:09:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:16,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:16,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:16,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:16,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:09:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:16,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:09:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:09:16,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:16,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131842796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:16,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:16,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 08:09:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067006955] [2022-12-14 08:09:16,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:16,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:09:16,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:09:16,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:09:16,715 INFO L87 Difference]: Start difference. First operand 1988 states and 2695 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 08:09:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:17,108 INFO L93 Difference]: Finished difference Result 2852 states and 3700 transitions. [2022-12-14 08:09:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:09:17,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-12-14 08:09:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:17,113 INFO L225 Difference]: With dead ends: 2852 [2022-12-14 08:09:17,113 INFO L226 Difference]: Without dead ends: 1805 [2022-12-14 08:09:17,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:09:17,115 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 369 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:17,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1429 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:09:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-12-14 08:09:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1620. [2022-12-14 08:09:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1289 states have (on average 1.3886733902249806) internal successors, (1790), 1296 states have internal predecessors, (1790), 215 states have call successors, (215), 116 states have call predecessors, (215), 114 states have return successors, (278), 209 states have call predecessors, (278), 212 states have call successors, (278) [2022-12-14 08:09:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2283 transitions. [2022-12-14 08:09:17,244 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2283 transitions. Word has length 102 [2022-12-14 08:09:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:17,244 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 2283 transitions. [2022-12-14 08:09:17,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 08:09:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2283 transitions. [2022-12-14 08:09:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 08:09:17,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:17,246 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:17,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:09:17,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 08:09:17,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:17,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1026972247, now seen corresponding path program 1 times [2022-12-14 08:09:17,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:17,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182073173] [2022-12-14 08:09:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:17,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:09:17,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:17,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182073173] [2022-12-14 08:09:17,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182073173] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:17,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481225574] [2022-12-14 08:09:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:17,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:17,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:17,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:09:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:17,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:09:17,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:09:17,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481225574] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:17,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:17,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 08:09:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692515227] [2022-12-14 08:09:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:17,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:09:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:09:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:09:17,839 INFO L87 Difference]: Start difference. First operand 1620 states and 2283 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 08:09:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:18,203 INFO L93 Difference]: Finished difference Result 2169 states and 2908 transitions. [2022-12-14 08:09:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:09:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-12-14 08:09:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:18,208 INFO L225 Difference]: With dead ends: 2169 [2022-12-14 08:09:18,208 INFO L226 Difference]: Without dead ends: 1576 [2022-12-14 08:09:18,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:09:18,210 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 63 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:18,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1797 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:09:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-12-14 08:09:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1484. [2022-12-14 08:09:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1189 states have (on average 1.4070647603027755) internal successors, (1673), 1196 states have internal predecessors, (1673), 196 states have call successors, (196), 99 states have call predecessors, (196), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2022-12-14 08:09:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2128 transitions. [2022-12-14 08:09:18,362 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2128 transitions. Word has length 112 [2022-12-14 08:09:18,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:18,362 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2128 transitions. [2022-12-14 08:09:18,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 08:09:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2128 transitions. [2022-12-14 08:09:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 08:09:18,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:18,364 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:18,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:09:18,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 08:09:18,564 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1973207149, now seen corresponding path program 1 times [2022-12-14 08:09:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:18,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487083215] [2022-12-14 08:09:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 08:09:18,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487083215] [2022-12-14 08:09:18,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487083215] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842812397] [2022-12-14 08:09:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:18,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:18,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:18,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:18,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:09:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:18,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:09:18,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:09:18,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:18,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842812397] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:18,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:18,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 08:09:18,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983284664] [2022-12-14 08:09:18,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:18,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:09:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:09:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:09:18,875 INFO L87 Difference]: Start difference. First operand 1484 states and 2128 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 08:09:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:19,240 INFO L93 Difference]: Finished difference Result 2233 states and 2973 transitions. [2022-12-14 08:09:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:09:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-12-14 08:09:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:19,245 INFO L225 Difference]: With dead ends: 2233 [2022-12-14 08:09:19,245 INFO L226 Difference]: Without dead ends: 1776 [2022-12-14 08:09:19,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 08:09:19,247 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 355 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:19,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1522 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:09:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-12-14 08:09:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1742. [2022-12-14 08:09:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1351 states have (on average 1.3715766099185789) internal successors, (1853), 1364 states have internal predecessors, (1853), 244 states have call successors, (244), 141 states have call predecessors, (244), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2022-12-14 08:09:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 2416 transitions. [2022-12-14 08:09:19,482 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 2416 transitions. Word has length 113 [2022-12-14 08:09:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:19,482 INFO L495 AbstractCegarLoop]: Abstraction has 1742 states and 2416 transitions. [2022-12-14 08:09:19,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 08:09:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 2416 transitions. [2022-12-14 08:09:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 08:09:19,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:19,486 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:19,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:09:19,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:19,687 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1956562976, now seen corresponding path program 1 times [2022-12-14 08:09:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:19,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719819634] [2022-12-14 08:09:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:19,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:09:20,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:20,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719819634] [2022-12-14 08:09:20,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719819634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:20,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368515716] [2022-12-14 08:09:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:20,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:20,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:20,233 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:20,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:09:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:20,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 08:09:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:09:20,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:09:22,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368515716] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:22,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1690792609] [2022-12-14 08:09:22,092 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 08:09:22,092 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:22,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:22,093 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:22,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:10:51,189 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-12-14 08:10:52,465 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 343 for LOIs [2022-12-14 08:10:52,616 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 334 for LOIs [2022-12-14 08:10:52,774 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-12-14 08:10:57,001 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-12-14 08:10:57,527 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 168 for LOIs [2022-12-14 08:10:58,049 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-12-14 08:10:59,763 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-12-14 08:11:00,679 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:11:40,827 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 368 DAG size of output: 284 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:12:22,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56814#(and (<= 0 ~t5_pc~0) (<= 0 ~t6_i~0) (<= ~t5_st~0 0) (<= 2 ~T6_E~0) (<= 0 |#NULL.base|) (<= ~T13_E~0 2) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 0 ~t13_i~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= 2 ~E_13~0) (= ~t7_i~0 0) (<= 0 ~t5_st~0) (<= ~t12_i~0 0) (<= ~T6_E~0 2) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= 0 ~t13_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 2 ~T13_E~0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= ~t13_pc~0 0) (<= 0 ~t13_pc~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~E_13~0 2) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= ~t5_pc~0 0) (<= 2 ~E_5~0) (<= ~t6_i~0 0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t13_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (<= ~T12_E~0 2) (<= ~t13_i~0 0))' at error location [2022-12-14 08:12:22,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:22,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:12:22,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-12-14 08:12:22,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192331669] [2022-12-14 08:12:22,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:22,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 08:12:22,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 08:12:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=10543, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 08:12:22,979 INFO L87 Difference]: Start difference. First operand 1742 states and 2416 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-12-14 08:12:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:42,468 INFO L93 Difference]: Finished difference Result 4253 states and 5332 transitions. [2022-12-14 08:12:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-12-14 08:12:42,469 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-12-14 08:12:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:42,476 INFO L225 Difference]: With dead ends: 4253 [2022-12-14 08:12:42,477 INFO L226 Difference]: Without dead ends: 3538 [2022-12-14 08:12:42,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44227 ImplicationChecksByTransitivity, 97.7s TimeCoverageRelationStatistics Valid=10086, Invalid=99144, Unknown=0, NotChecked=0, Total=109230 [2022-12-14 08:12:42,489 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 6135 mSDsluCounter, 3277 mSDsCounter, 0 mSdLazyCounter, 9071 mSolverCounterSat, 3105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6135 SdHoareTripleChecker+Valid, 3552 SdHoareTripleChecker+Invalid, 12176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3105 IncrementalHoareTripleChecker+Valid, 9071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:42,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6135 Valid, 3552 Invalid, 12176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3105 Valid, 9071 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 08:12:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2022-12-14 08:12:42,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2018. [2022-12-14 08:12:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1535 states have (on average 1.3446254071661239) internal successors, (2064), 1550 states have internal predecessors, (2064), 289 states have call successors, (289), 178 states have call predecessors, (289), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2022-12-14 08:12:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2729 transitions. [2022-12-14 08:12:42,715 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2729 transitions. Word has length 114 [2022-12-14 08:12:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:42,715 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 2729 transitions. [2022-12-14 08:12:42,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-12-14 08:12:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2729 transitions. [2022-12-14 08:12:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 08:12:42,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:42,717 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:42,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:12:42,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 08:12:42,919 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash -57536630, now seen corresponding path program 1 times [2022-12-14 08:12:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:42,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587034079] [2022-12-14 08:12:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:42,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:12:43,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:43,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587034079] [2022-12-14 08:12:43,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587034079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:43,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639890277] [2022-12-14 08:12:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:43,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:43,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:43,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:43,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:12:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:43,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:12:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 08:12:43,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 08:12:43,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639890277] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:43,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:12:43,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 08:12:43,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803826219] [2022-12-14 08:12:43,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:12:43,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:12:43,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:12:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:12:43,475 INFO L87 Difference]: Start difference. First operand 2018 states and 2729 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 08:12:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:44,297 INFO L93 Difference]: Finished difference Result 3342 states and 4277 transitions. [2022-12-14 08:12:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:12:44,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-12-14 08:12:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:44,304 INFO L225 Difference]: With dead ends: 3342 [2022-12-14 08:12:44,304 INFO L226 Difference]: Without dead ends: 2351 [2022-12-14 08:12:44,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 08:12:44,306 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 561 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:44,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 616 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:12:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2022-12-14 08:12:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2098. [2022-12-14 08:12:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1580 states have (on average 1.3386075949367089) internal successors, (2115), 1598 states have internal predecessors, (2115), 308 states have call successors, (308), 187 states have call predecessors, (308), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2022-12-14 08:12:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2839 transitions. [2022-12-14 08:12:44,547 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2839 transitions. Word has length 115 [2022-12-14 08:12:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:44,547 INFO L495 AbstractCegarLoop]: Abstraction has 2098 states and 2839 transitions. [2022-12-14 08:12:44,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 08:12:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2839 transitions. [2022-12-14 08:12:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 08:12:44,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:44,549 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:44,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:12:44,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:12:44,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1821386115, now seen corresponding path program 1 times [2022-12-14 08:12:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440255219] [2022-12-14 08:12:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:44,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 08:12:45,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440255219] [2022-12-14 08:12:45,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440255219] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141443520] [2022-12-14 08:12:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:45,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:45,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:45,307 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:45,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:12:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 08:12:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:12:45,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 08:12:47,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141443520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:12:47,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724566238] [2022-12-14 08:12:47,193 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 08:12:47,193 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:47,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:47,193 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:47,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:13:14,140 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-12-14 08:13:15,423 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 182 for LOIs [2022-12-14 08:13:15,439 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2022-12-14 08:13:15,458 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-12-14 08:13:19,697 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-12-14 08:13:20,233 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 170 for LOIs [2022-12-14 08:13:20,768 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-12-14 08:13:21,868 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-12-14 08:13:22,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:14:30,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75807#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:14:30,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:14:30,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:14:30,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-12-14 08:14:30,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236012596] [2022-12-14 08:14:30,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:14:30,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 08:14:30,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 08:14:30,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=11246, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 08:14:30,672 INFO L87 Difference]: Start difference. First operand 2098 states and 2839 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-12-14 08:14:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:44,817 INFO L93 Difference]: Finished difference Result 4382 states and 5541 transitions. [2022-12-14 08:14:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 08:14:44,818 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-12-14 08:14:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:44,825 INFO L225 Difference]: With dead ends: 4382 [2022-12-14 08:14:44,825 INFO L226 Difference]: Without dead ends: 3311 [2022-12-14 08:14:44,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 318 SyntacticMatches, 6 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26826 ImplicationChecksByTransitivity, 77.3s TimeCoverageRelationStatistics Valid=6762, Invalid=61620, Unknown=0, NotChecked=0, Total=68382 [2022-12-14 08:14:44,831 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 6445 mSDsluCounter, 3889 mSDsCounter, 0 mSdLazyCounter, 9755 mSolverCounterSat, 3572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6445 SdHoareTripleChecker+Valid, 4165 SdHoareTripleChecker+Invalid, 13327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3572 IncrementalHoareTripleChecker+Valid, 9755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:44,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6445 Valid, 4165 Invalid, 13327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3572 Valid, 9755 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 08:14:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2022-12-14 08:14:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 1914. [2022-12-14 08:14:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1468 states have (on average 1.353542234332425) internal successors, (1987), 1485 states have internal predecessors, (1987), 268 states have call successors, (268), 155 states have call predecessors, (268), 176 states have return successors, (366), 275 states have call predecessors, (366), 265 states have call successors, (366) [2022-12-14 08:14:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2621 transitions. [2022-12-14 08:14:45,090 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2621 transitions. Word has length 124 [2022-12-14 08:14:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:14:45,091 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2621 transitions. [2022-12-14 08:14:45,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-12-14 08:14:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2621 transitions. [2022-12-14 08:14:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 08:14:45,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:45,092 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:45,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:14:45,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 08:14:45,293 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:45,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1218069513, now seen corresponding path program 1 times [2022-12-14 08:14:45,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:45,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789434023] [2022-12-14 08:14:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 08:14:45,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:45,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789434023] [2022-12-14 08:14:45,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789434023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:14:45,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884530231] [2022-12-14 08:14:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:45,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:45,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:14:45,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:14:45,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:14:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:45,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:14:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:14:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 08:14:45,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:14:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 08:14:45,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884530231] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:14:45,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:14:45,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 08:14:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776695989] [2022-12-14 08:14:45,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:14:45,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:14:45,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:14:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:14:45,703 INFO L87 Difference]: Start difference. First operand 1914 states and 2621 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 08:14:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:46,512 INFO L93 Difference]: Finished difference Result 2569 states and 3362 transitions. [2022-12-14 08:14:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:14:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-12-14 08:14:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:46,517 INFO L225 Difference]: With dead ends: 2569 [2022-12-14 08:14:46,517 INFO L226 Difference]: Without dead ends: 1682 [2022-12-14 08:14:46,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:14:46,518 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 795 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:46,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 916 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:14:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-12-14 08:14:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1645. [2022-12-14 08:14:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1269 states have (on average 1.3727344365642238) internal successors, (1742), 1286 states have internal predecessors, (1742), 232 states have call successors, (232), 125 states have call predecessors, (232), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2022-12-14 08:14:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2299 transitions. [2022-12-14 08:14:46,732 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2299 transitions. Word has length 125 [2022-12-14 08:14:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:14:46,732 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2299 transitions. [2022-12-14 08:14:46,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 08:14:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2299 transitions. [2022-12-14 08:14:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:14:46,734 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:46,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:46,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:14:46,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:46,935 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1680805881, now seen corresponding path program 1 times [2022-12-14 08:14:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680309190] [2022-12-14 08:14:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:14:47,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680309190] [2022-12-14 08:14:47,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680309190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:14:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285409767] [2022-12-14 08:14:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:47,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:47,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:14:47,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:14:47,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:14:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:47,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:14:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:14:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 08:14:47,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:14:47,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285409767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:14:47,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:14:47,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:14:47,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898571680] [2022-12-14 08:14:47,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:14:47,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:14:47,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:14:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:47,190 INFO L87 Difference]: Start difference. First operand 1645 states and 2299 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2022-12-14 08:14:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:47,600 INFO L93 Difference]: Finished difference Result 3489 states and 5408 transitions. [2022-12-14 08:14:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:14:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 144 [2022-12-14 08:14:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:47,607 INFO L225 Difference]: With dead ends: 3489 [2022-12-14 08:14:47,607 INFO L226 Difference]: Without dead ends: 2559 [2022-12-14 08:14:47,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:47,609 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 371 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:47,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:14:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-12-14 08:14:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2550. [2022-12-14 08:14:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2037 states have (on average 1.432007854688267) internal successors, (2917), 2057 states have internal predecessors, (2917), 339 states have call successors, (339), 155 states have call predecessors, (339), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2022-12-14 08:14:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3750 transitions. [2022-12-14 08:14:47,922 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3750 transitions. Word has length 144 [2022-12-14 08:14:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:14:47,923 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 3750 transitions. [2022-12-14 08:14:47,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2022-12-14 08:14:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3750 transitions. [2022-12-14 08:14:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:14:47,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:47,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:47,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:14:48,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 08:14:48,127 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash 629278917, now seen corresponding path program 1 times [2022-12-14 08:14:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:48,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499449368] [2022-12-14 08:14:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:48,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:14:48,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499449368] [2022-12-14 08:14:48,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499449368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:14:48,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359285179] [2022-12-14 08:14:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:48,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:14:48,228 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:14:48,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:14:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:48,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:14:48,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:14:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:14:48,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:14:48,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359285179] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:14:48,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:14:48,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:14:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078614591] [2022-12-14 08:14:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:14:48,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:14:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:14:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:48,435 INFO L87 Difference]: Start difference. First operand 2550 states and 3750 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2022-12-14 08:14:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:49,082 INFO L93 Difference]: Finished difference Result 6189 states and 9862 transitions. [2022-12-14 08:14:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:14:49,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 144 [2022-12-14 08:14:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:49,092 INFO L225 Difference]: With dead ends: 6189 [2022-12-14 08:14:49,092 INFO L226 Difference]: Without dead ends: 4354 [2022-12-14 08:14:49,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:49,096 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 341 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:49,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:14:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-12-14 08:14:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4340. [2022-12-14 08:14:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4340 states, 3558 states have (on average 1.471894322653176) internal successors, (5237), 3584 states have internal predecessors, (5237), 548 states have call successors, (548), 215 states have call predecessors, (548), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2022-12-14 08:14:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4340 states to 4340 states and 6608 transitions. [2022-12-14 08:14:49,554 INFO L78 Accepts]: Start accepts. Automaton has 4340 states and 6608 transitions. Word has length 144 [2022-12-14 08:14:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:14:49,555 INFO L495 AbstractCegarLoop]: Abstraction has 4340 states and 6608 transitions. [2022-12-14 08:14:49,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2022-12-14 08:14:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4340 states and 6608 transitions. [2022-12-14 08:14:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:14:49,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:49,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:49,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 08:14:49,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 08:14:49,760 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:49,761 INFO L85 PathProgramCache]: Analyzing trace with hash -726375933, now seen corresponding path program 1 times [2022-12-14 08:14:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:49,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628965488] [2022-12-14 08:14:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:49,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:14:49,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628965488] [2022-12-14 08:14:49,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628965488] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:14:49,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20984596] [2022-12-14 08:14:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:49,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:14:49,859 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:14:49,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:14:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:14:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:14:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 08:14:50,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:14:50,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20984596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:14:50,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:14:50,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:14:50,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412662427] [2022-12-14 08:14:50,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:14:50,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:14:50,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:14:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:50,080 INFO L87 Difference]: Start difference. First operand 4340 states and 6608 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-12-14 08:14:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:51,124 INFO L93 Difference]: Finished difference Result 11529 states and 18629 transitions. [2022-12-14 08:14:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:14:51,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 144 [2022-12-14 08:14:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:51,142 INFO L225 Difference]: With dead ends: 11529 [2022-12-14 08:14:51,143 INFO L226 Difference]: Without dead ends: 7904 [2022-12-14 08:14:51,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:51,154 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 368 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:51,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:14:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2022-12-14 08:14:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 7880. [2022-12-14 08:14:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7880 states, 6570 states have (on average 1.4942161339421614) internal successors, (9817), 6608 states have internal predecessors, (9817), 956 states have call successors, (956), 335 states have call predecessors, (956), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2022-12-14 08:14:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 12236 transitions. [2022-12-14 08:14:51,962 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 12236 transitions. Word has length 144 [2022-12-14 08:14:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:14:51,962 INFO L495 AbstractCegarLoop]: Abstraction has 7880 states and 12236 transitions. [2022-12-14 08:14:51,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-12-14 08:14:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 12236 transitions. [2022-12-14 08:14:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:14:51,968 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:51,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:51,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 08:14:52,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:52,169 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:52,169 INFO L85 PathProgramCache]: Analyzing trace with hash 879899141, now seen corresponding path program 1 times [2022-12-14 08:14:52,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:52,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917466446] [2022-12-14 08:14:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:52,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:14:52,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917466446] [2022-12-14 08:14:52,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917466446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:14:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522187714] [2022-12-14 08:14:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:52,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:14:52,243 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:14:52,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:14:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:14:52,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:14:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 08:14:52,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:14:52,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522187714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:14:52,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:14:52,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:14:52,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228715506] [2022-12-14 08:14:52,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:14:52,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:14:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:14:52,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:52,411 INFO L87 Difference]: Start difference. First operand 7880 states and 12236 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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) [2022-12-14 08:14:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:54,061 INFO L93 Difference]: Finished difference Result 22089 states and 35881 transitions. [2022-12-14 08:14:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:14:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 144 [2022-12-14 08:14:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:54,097 INFO L225 Difference]: With dead ends: 22089 [2022-12-14 08:14:54,097 INFO L226 Difference]: Without dead ends: 14924 [2022-12-14 08:14:54,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:54,113 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 350 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:54,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:14:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14924 states. [2022-12-14 08:14:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14924 to 14880. [2022-12-14 08:14:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 12534 states have (on average 1.5044678474549227) internal successors, (18857), 12596 states have internal predecessors, (18857), 1752 states have call successors, (1752), 575 states have call predecessors, (1752), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2022-12-14 08:14:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 23316 transitions. [2022-12-14 08:14:55,713 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 23316 transitions. Word has length 144 [2022-12-14 08:14:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:14:55,714 INFO L495 AbstractCegarLoop]: Abstraction has 14880 states and 23316 transitions. [2022-12-14 08:14:55,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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) [2022-12-14 08:14:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 23316 transitions. [2022-12-14 08:14:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:14:55,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:14:55,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:14:55,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 08:14:55,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:55,925 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:14:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:14:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash 798842503, now seen corresponding path program 1 times [2022-12-14 08:14:55,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:14:55,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637762785] [2022-12-14 08:14:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:55,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:14:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:14:55,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:14:55,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637762785] [2022-12-14 08:14:55,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637762785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:14:55,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408709060] [2022-12-14 08:14:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:14:55,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:14:55,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:14:56,000 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:14:56,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:14:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:14:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:14:56,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:14:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 08:14:56,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:14:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408709060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:14:56,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:14:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:14:56,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908170829] [2022-12-14 08:14:56,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:14:56,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:14:56,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:14:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:14:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:56,177 INFO L87 Difference]: Start difference. First operand 14880 states and 23316 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2022-12-14 08:14:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:14:59,296 INFO L93 Difference]: Finished difference Result 42969 states and 69821 transitions. [2022-12-14 08:14:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:14:59,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 144 [2022-12-14 08:14:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:14:59,385 INFO L225 Difference]: With dead ends: 42969 [2022-12-14 08:14:59,385 INFO L226 Difference]: Without dead ends: 28804 [2022-12-14 08:14:59,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:14:59,424 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 356 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:14:59,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:14:59,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28804 states. [2022-12-14 08:15:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28804 to 28720. [2022-12-14 08:15:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28720 states, 24342 states have (on average 1.5075589516062773) internal successors, (36697), 24452 states have internal predecessors, (36697), 3304 states have call successors, (3304), 1055 states have call predecessors, (3304), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2022-12-14 08:15:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28720 states to 28720 states and 45124 transitions. [2022-12-14 08:15:02,581 INFO L78 Accepts]: Start accepts. Automaton has 28720 states and 45124 transitions. Word has length 144 [2022-12-14 08:15:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:02,581 INFO L495 AbstractCegarLoop]: Abstraction has 28720 states and 45124 transitions. [2022-12-14 08:15:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2022-12-14 08:15:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 28720 states and 45124 transitions. [2022-12-14 08:15:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:15:02,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:02,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:02,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 08:15:02,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 08:15:02,802 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1302438281, now seen corresponding path program 1 times [2022-12-14 08:15:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:02,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756156435] [2022-12-14 08:15:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:02,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:15:02,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756156435] [2022-12-14 08:15:02,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756156435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:15:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034425747] [2022-12-14 08:15:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:02,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:02,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:02,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 08:15:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:03,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:15:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 08:15:03,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:15:03,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034425747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:03,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:15:03,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:15:03,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426062887] [2022-12-14 08:15:03,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:03,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:15:03,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:15:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:15:03,093 INFO L87 Difference]: Start difference. First operand 28720 states and 45124 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2022-12-14 08:15:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:08,947 INFO L93 Difference]: Finished difference Result 84249 states and 136573 transitions. [2022-12-14 08:15:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:15:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 144 [2022-12-14 08:15:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:09,097 INFO L225 Difference]: With dead ends: 84249 [2022-12-14 08:15:09,097 INFO L226 Difference]: Without dead ends: 56244 [2022-12-14 08:15:09,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:15:09,180 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 362 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:09,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:15:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states. [2022-12-14 08:15:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56244 to 56080. [2022-12-14 08:15:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56080 states, 47718 states have (on average 1.5067060647973511) internal successors, (71897), 47924 states have internal predecessors, (71897), 6328 states have call successors, (6328), 2015 states have call predecessors, (6328), 2032 states have return successors, (9811), 6142 states have call predecessors, (9811), 6325 states have call successors, (9811) [2022-12-14 08:15:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56080 states to 56080 states and 88036 transitions. [2022-12-14 08:15:14,889 INFO L78 Accepts]: Start accepts. Automaton has 56080 states and 88036 transitions. Word has length 144 [2022-12-14 08:15:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:14,889 INFO L495 AbstractCegarLoop]: Abstraction has 56080 states and 88036 transitions. [2022-12-14 08:15:14,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2022-12-14 08:15:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 56080 states and 88036 transitions. [2022-12-14 08:15:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:15:14,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:14,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:14,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 08:15:15,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:15,130 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2081154293, now seen corresponding path program 1 times [2022-12-14 08:15:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:15,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344315411] [2022-12-14 08:15:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:15:15,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:15,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344315411] [2022-12-14 08:15:15,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344315411] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:15:15,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329368809] [2022-12-14 08:15:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:15,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:15,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:15,242 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:15,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 08:15:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:15,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:15:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 08:15:15,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:15:15,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329368809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:15,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:15:15,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 08:15:15,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052055041] [2022-12-14 08:15:15,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:15,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:15:15,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:15,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:15:15,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:15:15,560 INFO L87 Difference]: Start difference. First operand 56080 states and 88036 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2022-12-14 08:15:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:26,351 INFO L93 Difference]: Finished difference Result 165849 states and 267821 transitions. [2022-12-14 08:15:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:15:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 144 [2022-12-14 08:15:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:26,768 INFO L225 Difference]: With dead ends: 165849 [2022-12-14 08:15:26,769 INFO L226 Difference]: Without dead ends: 110484 [2022-12-14 08:15:26,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:15:26,894 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 347 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:26,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:15:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110484 states. [2022-12-14 08:15:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110484 to 110160. [2022-12-14 08:15:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110160 states, 93990 states have (on average 1.5037450792637514) internal successors, (141337), 94388 states have internal predecessors, (141337), 12216 states have call successors, (12216), 3935 states have call predecessors, (12216), 3952 states have return successors, (18899), 11838 states have call predecessors, (18899), 12213 states have call successors, (18899) [2022-12-14 08:15:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110160 states to 110160 states and 172452 transitions. [2022-12-14 08:15:38,238 INFO L78 Accepts]: Start accepts. Automaton has 110160 states and 172452 transitions. Word has length 144 [2022-12-14 08:15:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:38,238 INFO L495 AbstractCegarLoop]: Abstraction has 110160 states and 172452 transitions. [2022-12-14 08:15:38,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2022-12-14 08:15:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 110160 states and 172452 transitions. [2022-12-14 08:15:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:15:38,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:38,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:15:38,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 08:15:38,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8fd7889-22d0-4d52-8697-0fe52bbf1f49/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 08:15:38,509 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:15:38,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1610747337, now seen corresponding path program 1 times [2022-12-14 08:15:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:15:38,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837288494] [2022-12-14 08:15:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:38,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:15:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 08:15:38,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:15:38,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837288494] [2022-12-14 08:15:38,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837288494] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:38,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:15:38,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:15:38,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888705300] [2022-12-14 08:15:38,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:38,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:15:38,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:15:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:15:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:15:38,768 INFO L87 Difference]: Start difference. First operand 110160 states and 172452 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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) [2022-12-14 08:16:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:05,028 INFO L93 Difference]: Finished difference Result 380888 states and 600171 transitions. [2022-12-14 08:16:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:16:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 144 [2022-12-14 08:16:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:06,165 INFO L225 Difference]: With dead ends: 380888 [2022-12-14 08:16:06,165 INFO L226 Difference]: Without dead ends: 271444 [2022-12-14 08:16:06,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:16:06,493 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1232 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:06,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 1082 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:16:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271444 states. [2022-12-14 08:16:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271444 to 215760. [2022-12-14 08:16:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215760 states, 184294 states have (on average 1.4996527287920387) internal successors, (276377), 185076 states have internal predecessors, (276377), 23672 states have call successors, (23672), 7775 states have call predecessors, (23672), 7792 states have return successors, (36499), 22910 states have call predecessors, (36499), 23669 states have call successors, (36499) [2022-12-14 08:16:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215760 states to 215760 states and 336548 transitions. [2022-12-14 08:16:31,114 INFO L78 Accepts]: Start accepts. Automaton has 215760 states and 336548 transitions. Word has length 144 [2022-12-14 08:16:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:31,115 INFO L495 AbstractCegarLoop]: Abstraction has 215760 states and 336548 transitions. [2022-12-14 08:16:31,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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) [2022-12-14 08:16:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 215760 states and 336548 transitions. [2022-12-14 08:16:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 08:16:31,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:31,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:31,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 08:16:31,257 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:16:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:31,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1965883429, now seen corresponding path program 1 times [2022-12-14 08:16:31,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:16:31,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844667178] [2022-12-14 08:16:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:31,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:16:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 08:16:31,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:16:31,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844667178] [2022-12-14 08:16:31,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844667178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:31,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:31,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:16:31,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926586281] [2022-12-14 08:16:31,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:31,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:16:31,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:16:31,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:16:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:16:31,522 INFO L87 Difference]: Start difference. First operand 215760 states and 336548 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2022-12-14 08:17:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:15,433 INFO L93 Difference]: Finished difference Result 586968 states and 921642 transitions. [2022-12-14 08:17:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:17:15,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 145 [2022-12-14 08:17:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:16,920 INFO L225 Difference]: With dead ends: 586968 [2022-12-14 08:17:16,920 INFO L226 Difference]: Without dead ends: 371924 [2022-12-14 08:17:17,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:17:17,415 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1166 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:17,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 953 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:17:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371924 states. [2022-12-14 08:17:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371924 to 320720. [2022-12-14 08:17:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320720 states, 273958 states have (on average 1.495911782097986) internal successors, (409817), 275124 states have internal predecessors, (409817), 35128 states have call successors, (35128), 11615 states have call predecessors, (35128), 11632 states have return successors, (54099), 33982 states have call predecessors, (54099), 35125 states have call successors, (54099) [2022-12-14 08:17:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320720 states to 320720 states and 499044 transitions. [2022-12-14 08:17:59,002 INFO L78 Accepts]: Start accepts. Automaton has 320720 states and 499044 transitions. Word has length 145 [2022-12-14 08:17:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:59,002 INFO L495 AbstractCegarLoop]: Abstraction has 320720 states and 499044 transitions. [2022-12-14 08:17:59,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2022-12-14 08:17:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 320720 states and 499044 transitions. [2022-12-14 08:17:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 08:17:59,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:59,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:17:59,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 08:17:59,306 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:17:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:59,307 INFO L85 PathProgramCache]: Analyzing trace with hash -185590195, now seen corresponding path program 1 times [2022-12-14 08:17:59,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:17:59,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981355447] [2022-12-14 08:17:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:59,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:17:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 08:17:59,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:17:59,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981355447] [2022-12-14 08:17:59,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981355447] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:59,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:59,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:17:59,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100033797] [2022-12-14 08:17:59,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:59,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:17:59,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:17:59,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:17:59,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:17:59,745 INFO L87 Difference]: Start difference. First operand 320720 states and 499044 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2022-12-14 08:19:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:19:05,090 INFO L93 Difference]: Finished difference Result 866968 states and 1359690 transitions. [2022-12-14 08:19:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:19:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 146 [2022-12-14 08:19:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:19:07,380 INFO L225 Difference]: With dead ends: 866968 [2022-12-14 08:19:07,380 INFO L226 Difference]: Without dead ends: 546964 [2022-12-14 08:19:08,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:19:08,190 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1143 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:19:08,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 943 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:19:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546964 states. [2022-12-14 08:20:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546964 to 476880. [2022-12-14 08:20:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476880 states, 407334 states have (on average 1.4919869198250084) internal successors, (607737), 409076 states have internal predecessors, (607737), 52152 states have call successors, (52152), 17375 states have call predecessors, (52152), 17392 states have return successors, (80211), 50430 states have call predecessors, (80211), 52149 states have call successors, (80211) [2022-12-14 08:20:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476880 states to 476880 states and 740100 transitions. [2022-12-14 08:20:09,443 INFO L78 Accepts]: Start accepts. Automaton has 476880 states and 740100 transitions. Word has length 146 [2022-12-14 08:20:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:20:09,444 INFO L495 AbstractCegarLoop]: Abstraction has 476880 states and 740100 transitions. [2022-12-14 08:20:09,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2022-12-14 08:20:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 476880 states and 740100 transitions. [2022-12-14 08:20:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 08:20:09,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:20:09,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:20:09,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 08:20:09,780 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:20:09,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:20:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash 305287073, now seen corresponding path program 1 times [2022-12-14 08:20:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:20:09,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135041780] [2022-12-14 08:20:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:20:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:20:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:20:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 08:20:10,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:20:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135041780] [2022-12-14 08:20:10,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135041780] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:20:10,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:20:10,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:20:10,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787322434] [2022-12-14 08:20:10,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:20:10,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:20:10,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:20:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:20:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:20:10,232 INFO L87 Difference]: Start difference. First operand 476880 states and 740100 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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)