./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.09.cil-2.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_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/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_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/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_b7e888a6-8d03-4b91-a75f-669ace232630/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 ae06fa96255229a08f1e8c01eaa7f353b1ba462dacd64e058a3c6957598773d9 --- 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 14:07:11,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:07:11,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:07:11,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:07:11,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:07:11,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:07:11,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:07:11,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:07:11,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:07:11,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:07:11,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:07:11,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:07:11,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:07:11,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:07:11,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:07:11,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:07:11,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:07:11,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:07:11,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:07:11,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:07:11,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:07:11,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:07:11,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:07:11,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:07:11,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:07:11,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:07:11,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:07:11,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:07:11,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:07:11,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:07:11,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:07:11,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:07:11,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:07:11,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:07:11,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:07:11,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:07:11,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:07:11,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:07:11,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:07:11,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:07:11,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:07:11,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:07:11,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:07:11,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:07:11,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:07:11,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:07:11,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:07:11,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:07:11,444 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:07:11,444 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:07:11,445 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:07:11,445 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:07:11,445 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:07:11,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:07:11,445 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:07:11,445 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:07:11,446 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:07:11,446 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:07:11,446 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:07:11,446 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:07:11,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:07:11,447 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:07:11,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:07:11,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:07:11,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:07:11,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:07:11,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:07:11,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:07:11,448 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:07:11,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:07:11,449 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:07:11,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:07:11,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:07:11,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:07:11,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:07:11,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:07:11,450 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:07:11,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:07:11,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:07:11,450 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:07:11,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:07:11,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:07:11,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:07:11,451 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_b7e888a6-8d03-4b91-a75f-669ace232630/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae06fa96255229a08f1e8c01eaa7f353b1ba462dacd64e058a3c6957598773d9 [2022-12-14 14:07:11,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:07:11,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:07:11,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:07:11,659 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:07:11,659 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:07:11,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2022-12-14 14:07:14,274 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:07:14,432 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:07:14,432 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2022-12-14 14:07:14,440 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/data/7337989d7/c7920c1cd42f4bfabbb5474dfef349de/FLAGef17c5cc4 [2022-12-14 14:07:14,452 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/data/7337989d7/c7920c1cd42f4bfabbb5474dfef349de [2022-12-14 14:07:14,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:07:14,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:07:14,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:07:14,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:07:14,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:07:14,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3268e556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14, skipping insertion in model container [2022-12-14 14:07:14,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:07:14,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:07:14,614 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_b7e888a6-8d03-4b91-a75f-669ace232630/sv-benchmarks/c/systemc/token_ring.09.cil-2.c[671,684] [2022-12-14 14:07:14,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:07:14,711 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:07:14,720 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_b7e888a6-8d03-4b91-a75f-669ace232630/sv-benchmarks/c/systemc/token_ring.09.cil-2.c[671,684] [2022-12-14 14:07:14,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:07:14,769 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:07:14,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14 WrapperNode [2022-12-14 14:07:14,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:07:14,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:07:14,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:07:14,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:07:14,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,813 INFO L138 Inliner]: procedures = 46, calls = 59, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 684 [2022-12-14 14:07:14,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:07:14,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:07:14,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:07:14,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:07:14,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,840 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:07:14,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:07:14,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:07:14,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:07:14,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (1/1) ... [2022-12-14 14:07:14,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:07:14,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:14,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:07:14,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:07:14,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:07:14,904 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 14:07:14,904 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 14:07:14,904 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 14:07:14,904 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 14:07:14,904 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 14:07:14,905 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 14:07:14,905 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 14:07:14,905 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 14:07:14,905 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 14:07:14,905 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 14:07:14,905 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 14:07:14,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 14:07:14,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:07:14,905 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 14:07:14,905 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 14:07:14,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:07:14,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:07:15,014 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:07:15,017 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:07:15,525 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:07:15,859 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:07:15,860 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-12-14 14:07:15,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:07:15 BoogieIcfgContainer [2022-12-14 14:07:15,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:07:15,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:07:15,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:07:15,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:07:15,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:07:14" (1/3) ... [2022-12-14 14:07:15,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a124459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:07:15, skipping insertion in model container [2022-12-14 14:07:15,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:07:14" (2/3) ... [2022-12-14 14:07:15,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a124459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:07:15, skipping insertion in model container [2022-12-14 14:07:15,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:07:15" (3/3) ... [2022-12-14 14:07:15,872 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-2.c [2022-12-14 14:07:15,893 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:07:15,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:07:15,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:07:15,952 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;@3eee37c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:07:15,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:07:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 127 states have (on average 1.5590551181102361) internal successors, (198), 131 states have internal predecessors, (198), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 14:07:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 14:07:15,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:15,968 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] [2022-12-14 14:07:15,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash -751963223, now seen corresponding path program 1 times [2022-12-14 14:07:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:15,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125980486] [2022-12-14 14:07:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:16,310 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 14:07:16,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:16,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125980486] [2022-12-14 14:07:16,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125980486] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:16,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:07:16,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:07:16,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709670316] [2022-12-14 14:07:16,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:16,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:07:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:07:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:07:16,349 INFO L87 Difference]: Start difference. First operand has 161 states, 127 states have (on average 1.5590551181102361) internal successors, (198), 131 states have internal predecessors, (198), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (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 14:07:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:16,730 INFO L93 Difference]: Finished difference Result 460 states and 723 transitions. [2022-12-14 14:07:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:07:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (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 58 [2022-12-14 14:07:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:16,743 INFO L225 Difference]: With dead ends: 460 [2022-12-14 14:07:16,743 INFO L226 Difference]: Without dead ends: 300 [2022-12-14 14:07:16,747 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 14:07:16,750 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 421 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:16,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 654 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:07:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-12-14 14:07:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-12-14 14:07:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 242 states have (on average 1.512396694214876) internal successors, (366), 245 states have internal predecessors, (366), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 14:07:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 452 transitions. [2022-12-14 14:07:16,821 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 452 transitions. Word has length 58 [2022-12-14 14:07:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:16,822 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 452 transitions. [2022-12-14 14:07:16,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (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 14:07:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 452 transitions. [2022-12-14 14:07:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 14:07:16,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:16,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:16,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:07:16,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:16,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash -338953364, now seen corresponding path program 1 times [2022-12-14 14:07:16,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:16,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328460203] [2022-12-14 14:07:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:16,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 14:07:17,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:17,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328460203] [2022-12-14 14:07:17,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328460203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882785109] [2022-12-14 14:07:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:17,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:17,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:17,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:17,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:07:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:07:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:07:17,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:07:17,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882785109] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:17,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:07:17,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 14:07:17,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872154220] [2022-12-14 14:07:17,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:17,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:17,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:07:17,265 INFO L87 Difference]: Start difference. First operand 299 states and 452 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:07:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:17,391 INFO L93 Difference]: Finished difference Result 880 states and 1353 transitions. [2022-12-14 14:07:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:17,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 14:07:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:17,396 INFO L225 Difference]: With dead ends: 880 [2022-12-14 14:07:17,397 INFO L226 Difference]: Without dead ends: 586 [2022-12-14 14:07:17,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:07:17,400 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 195 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:17,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 439 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-12-14 14:07:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 580. [2022-12-14 14:07:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 475 states have (on average 1.5094736842105263) internal successors, (717), 479 states have internal predecessors, (717), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 14:07:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 875 transitions. [2022-12-14 14:07:17,446 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 875 transitions. Word has length 115 [2022-12-14 14:07:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:17,447 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 875 transitions. [2022-12-14 14:07:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:07:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 875 transitions. [2022-12-14 14:07:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 14:07:17,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:17,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:17,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:07:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 14:07:17,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1673250262, now seen corresponding path program 1 times [2022-12-14 14:07:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:17,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018403507] [2022-12-14 14:07:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 14:07:17,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:17,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018403507] [2022-12-14 14:07:17,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018403507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:17,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675976881] [2022-12-14 14:07:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:17,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:17,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:17,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:07:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:07:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:07:17,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:07:17,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675976881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:17,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:07:17,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 14:07:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205149471] [2022-12-14 14:07:17,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:17,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:07:17,995 INFO L87 Difference]: Start difference. First operand 580 states and 875 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 14:07:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:18,128 INFO L93 Difference]: Finished difference Result 1717 states and 2634 transitions. [2022-12-14 14:07:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 115 [2022-12-14 14:07:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:18,136 INFO L225 Difference]: With dead ends: 1717 [2022-12-14 14:07:18,136 INFO L226 Difference]: Without dead ends: 1142 [2022-12-14 14:07:18,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:07:18,140 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 213 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:18,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 427 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-12-14 14:07:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1134. [2022-12-14 14:07:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 935 states have (on average 1.504812834224599) internal successors, (1407), 941 states have internal predecessors, (1407), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 14:07:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1705 transitions. [2022-12-14 14:07:18,210 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1705 transitions. Word has length 115 [2022-12-14 14:07:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:18,210 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 1705 transitions. [2022-12-14 14:07:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 14:07:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1705 transitions. [2022-12-14 14:07:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 14:07:18,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:18,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:18,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:07:18,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:18,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash 115180904, now seen corresponding path program 1 times [2022-12-14 14:07:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:18,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773349260] [2022-12-14 14:07:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 14:07:18,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773349260] [2022-12-14 14:07:18,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773349260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275570847] [2022-12-14 14:07:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:18,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:18,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:18,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:18,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:07:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:07:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 14:07:18,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:07:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275570847] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:18,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:07:18,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 14:07:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855916369] [2022-12-14 14:07:18,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:18,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:07:18,809 INFO L87 Difference]: Start difference. First operand 1134 states and 1705 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 14:07:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:18,986 INFO L93 Difference]: Finished difference Result 3367 states and 5146 transitions. [2022-12-14 14:07:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:18,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 115 [2022-12-14 14:07:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:18,998 INFO L225 Difference]: With dead ends: 3367 [2022-12-14 14:07:18,999 INFO L226 Difference]: Without dead ends: 2238 [2022-12-14 14:07:19,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:07:19,005 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 216 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:19,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 437 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2022-12-14 14:07:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2226. [2022-12-14 14:07:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 1843 states have (on average 1.4991861096039067) internal successors, (2763), 1853 states have internal predecessors, (2763), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-12-14 14:07:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3333 transitions. [2022-12-14 14:07:19,117 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3333 transitions. Word has length 115 [2022-12-14 14:07:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:19,117 INFO L495 AbstractCegarLoop]: Abstraction has 2226 states and 3333 transitions. [2022-12-14 14:07:19,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 14:07:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3333 transitions. [2022-12-14 14:07:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 14:07:19,121 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:19,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:19,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:07:19,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:19,322 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 198740330, now seen corresponding path program 1 times [2022-12-14 14:07:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:19,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055997242] [2022-12-14 14:07:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 14:07:19,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055997242] [2022-12-14 14:07:19,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055997242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487431070] [2022-12-14 14:07:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:19,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:19,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:19,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:19,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:07:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:19,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:07:19,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 14:07:19,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:07:19,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487431070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:19,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:07:19,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:07:19,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719642984] [2022-12-14 14:07:19,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:19,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:19,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:19,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:07:19,594 INFO L87 Difference]: Start difference. First operand 2226 states and 3333 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 14:07:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:19,769 INFO L93 Difference]: Finished difference Result 6619 states and 10070 transitions. [2022-12-14 14:07:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:19,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 115 [2022-12-14 14:07:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:19,793 INFO L225 Difference]: With dead ends: 6619 [2022-12-14 14:07:19,793 INFO L226 Difference]: Without dead ends: 4398 [2022-12-14 14:07:19,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 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 14:07:19,804 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 207 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:19,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 403 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2022-12-14 14:07:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 4378. [2022-12-14 14:07:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 3635 states have (on average 1.4929848693259973) internal successors, (5427), 3653 states have internal predecessors, (5427), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-12-14 14:07:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 6525 transitions. [2022-12-14 14:07:19,954 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 6525 transitions. Word has length 115 [2022-12-14 14:07:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:19,954 INFO L495 AbstractCegarLoop]: Abstraction has 4378 states and 6525 transitions. [2022-12-14 14:07:19,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 14:07:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 6525 transitions. [2022-12-14 14:07:19,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 14:07:19,968 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:19,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:19,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:07:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:20,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:20,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1994220760, now seen corresponding path program 1 times [2022-12-14 14:07:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:20,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108620366] [2022-12-14 14:07:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 14:07:20,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:20,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108620366] [2022-12-14 14:07:20,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108620366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:20,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286723744] [2022-12-14 14:07:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:20,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:20,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:20,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:07:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:07:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:07:20,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:07:20,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286723744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:20,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:07:20,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 14:07:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435789995] [2022-12-14 14:07:20,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:20,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:20,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:07:20,436 INFO L87 Difference]: Start difference. First operand 4378 states and 6525 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:07:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:20,704 INFO L93 Difference]: Finished difference Result 13027 states and 19718 transitions. [2022-12-14 14:07:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:20,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 14:07:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:20,732 INFO L225 Difference]: With dead ends: 13027 [2022-12-14 14:07:20,732 INFO L226 Difference]: Without dead ends: 8654 [2022-12-14 14:07:20,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 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 14:07:20,744 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 201 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:20,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 403 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8654 states. [2022-12-14 14:07:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8654 to 8618. [2022-12-14 14:07:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8618 states, 7171 states have (on average 1.4864035699344582) internal successors, (10659), 7205 states have internal predecessors, (10659), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-12-14 14:07:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8618 states to 8618 states and 12781 transitions. [2022-12-14 14:07:21,133 INFO L78 Accepts]: Start accepts. Automaton has 8618 states and 12781 transitions. Word has length 115 [2022-12-14 14:07:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:21,133 INFO L495 AbstractCegarLoop]: Abstraction has 8618 states and 12781 transitions. [2022-12-14 14:07:21,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:07:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 8618 states and 12781 transitions. [2022-12-14 14:07:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 14:07:21,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:21,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:21,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:07:21,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 14:07:21,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash 81023846, now seen corresponding path program 1 times [2022-12-14 14:07:21,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:21,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503306665] [2022-12-14 14:07:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:21,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 14:07:21,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:21,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503306665] [2022-12-14 14:07:21,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503306665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:21,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:07:21,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:07:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551712648] [2022-12-14 14:07:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:21,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:21,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:07:21,526 INFO L87 Difference]: Start difference. First operand 8618 states and 12781 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 14:07:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:22,006 INFO L93 Difference]: Finished difference Result 15310 states and 23120 transitions. [2022-12-14 14:07:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:22,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 115 [2022-12-14 14:07:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:22,090 INFO L225 Difference]: With dead ends: 15310 [2022-12-14 14:07:22,090 INFO L226 Difference]: Without dead ends: 10890 [2022-12-14 14:07:22,112 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 14:07:22,113 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 101 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:22,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 509 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10890 states. [2022-12-14 14:07:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10890 to 10202. [2022-12-14 14:07:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 8691 states have (on average 1.5283626740306064) internal successors, (13283), 8725 states have internal predecessors, (13283), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-12-14 14:07:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 15469 transitions. [2022-12-14 14:07:22,464 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 15469 transitions. Word has length 115 [2022-12-14 14:07:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:22,464 INFO L495 AbstractCegarLoop]: Abstraction has 10202 states and 15469 transitions. [2022-12-14 14:07:22,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 14:07:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 15469 transitions. [2022-12-14 14:07:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:07:22,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:22,490 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:07:22,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:07:22,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2009507153, now seen corresponding path program 1 times [2022-12-14 14:07:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:22,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180103541] [2022-12-14 14:07:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:22,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 14:07:22,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:22,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180103541] [2022-12-14 14:07:22,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180103541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:22,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:07:22,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:07:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415965521] [2022-12-14 14:07:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:22,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:07:22,579 INFO L87 Difference]: Start difference. First operand 10202 states and 15469 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:07:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:23,326 INFO L93 Difference]: Finished difference Result 30307 states and 46486 transitions. [2022-12-14 14:07:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:23,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 14:07:23,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:23,404 INFO L225 Difference]: With dead ends: 30307 [2022-12-14 14:07:23,405 INFO L226 Difference]: Without dead ends: 20110 [2022-12-14 14:07:23,422 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 14:07:23,422 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 203 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 405 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 14:07:23,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 405 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2022-12-14 14:07:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 20010. [2022-12-14 14:07:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20010 states, 17059 states have (on average 1.5196084178439533) internal successors, (25923), 17125 states have internal predecessors, (25923), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-12-14 14:07:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20010 states to 20010 states and 30157 transitions. [2022-12-14 14:07:24,180 INFO L78 Accepts]: Start accepts. Automaton has 20010 states and 30157 transitions. Word has length 156 [2022-12-14 14:07:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:24,180 INFO L495 AbstractCegarLoop]: Abstraction has 20010 states and 30157 transitions. [2022-12-14 14:07:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:07:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 20010 states and 30157 transitions. [2022-12-14 14:07:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:07:24,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:24,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:07:24,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:07:24,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:24,221 INFO L85 PathProgramCache]: Analyzing trace with hash 755848712, now seen corresponding path program 1 times [2022-12-14 14:07:24,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:24,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522993197] [2022-12-14 14:07:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 14:07:24,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522993197] [2022-12-14 14:07:24,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522993197] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:24,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:07:24,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:07:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047148837] [2022-12-14 14:07:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:07:24,287 INFO L87 Difference]: Start difference. First operand 20010 states and 30157 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:07:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:25,369 INFO L93 Difference]: Finished difference Result 59443 states and 90582 transitions. [2022-12-14 14:07:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:25,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 14:07:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:25,497 INFO L225 Difference]: With dead ends: 59443 [2022-12-14 14:07:25,497 INFO L226 Difference]: Without dead ends: 39438 [2022-12-14 14:07:25,542 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 14:07:25,542 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 205 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 405 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 14:07:25,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 405 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39438 states. [2022-12-14 14:07:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39438 to 39242. [2022-12-14 14:07:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39242 states, 33475 states have (on average 1.510470500373413) internal successors, (50563), 33605 states have internal predecessors, (50563), 4102 states have call successors, (4102), 1665 states have call predecessors, (4102), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-12-14 14:07:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39242 states to 39242 states and 58765 transitions. [2022-12-14 14:07:26,872 INFO L78 Accepts]: Start accepts. Automaton has 39242 states and 58765 transitions. Word has length 156 [2022-12-14 14:07:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:26,872 INFO L495 AbstractCegarLoop]: Abstraction has 39242 states and 58765 transitions. [2022-12-14 14:07:26,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:07:26,872 INFO L276 IsEmpty]: Start isEmpty. Operand 39242 states and 58765 transitions. [2022-12-14 14:07:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:07:26,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:26,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:07:26,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:07:26,946 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:26,946 INFO L85 PathProgramCache]: Analyzing trace with hash 844525045, now seen corresponding path program 1 times [2022-12-14 14:07:26,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:26,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929843142] [2022-12-14 14:07:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:26,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 14:07:27,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:27,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929843142] [2022-12-14 14:07:27,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929843142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:27,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:07:27,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:07:27,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008666654] [2022-12-14 14:07:27,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:27,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:27,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:27,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:07:27,007 INFO L87 Difference]: Start difference. First operand 39242 states and 58765 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:07:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:29,162 INFO L93 Difference]: Finished difference Result 116563 states and 176406 transitions. [2022-12-14 14:07:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 14:07:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:29,403 INFO L225 Difference]: With dead ends: 116563 [2022-12-14 14:07:29,403 INFO L226 Difference]: Without dead ends: 77326 [2022-12-14 14:07:29,504 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 14:07:29,504 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 207 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:29,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 405 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:07:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77326 states. [2022-12-14 14:07:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77326 to 76938. [2022-12-14 14:07:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76938 states, 65667 states have (on average 1.500951771818417) internal successors, (98563), 65925 states have internal predecessors, (98563), 7942 states have call successors, (7942), 3329 states have call predecessors, (7942), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-12-14 14:07:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76938 states to 76938 states and 114445 transitions. [2022-12-14 14:07:32,033 INFO L78 Accepts]: Start accepts. Automaton has 76938 states and 114445 transitions. Word has length 156 [2022-12-14 14:07:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:32,033 INFO L495 AbstractCegarLoop]: Abstraction has 76938 states and 114445 transitions. [2022-12-14 14:07:32,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:07:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 76938 states and 114445 transitions. [2022-12-14 14:07:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:07:32,132 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:32,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:07:32,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:07:32,132 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:32,133 INFO L85 PathProgramCache]: Analyzing trace with hash -734122969, now seen corresponding path program 1 times [2022-12-14 14:07:32,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:32,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489803598] [2022-12-14 14:07:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:32,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 14:07:32,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:32,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489803598] [2022-12-14 14:07:32,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489803598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:32,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:07:32,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:07:32,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451599449] [2022-12-14 14:07:32,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:32,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:32,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:07:32,194 INFO L87 Difference]: Start difference. First operand 76938 states and 114445 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:07:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:36,435 INFO L93 Difference]: Finished difference Result 228499 states and 343318 transitions. [2022-12-14 14:07:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:36,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 14:07:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:36,939 INFO L225 Difference]: With dead ends: 228499 [2022-12-14 14:07:36,939 INFO L226 Difference]: Without dead ends: 151566 [2022-12-14 14:07:37,154 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 14:07:37,155 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 210 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:37,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 425 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151566 states. [2022-12-14 14:07:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151566 to 150794. [2022-12-14 14:07:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150794 states, 128771 states have (on average 1.4910422377709267) internal successors, (192003), 129285 states have internal predecessors, (192003), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 14:07:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150794 states to 150794 states and 222733 transitions. [2022-12-14 14:07:41,782 INFO L78 Accepts]: Start accepts. Automaton has 150794 states and 222733 transitions. Word has length 156 [2022-12-14 14:07:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:41,782 INFO L495 AbstractCegarLoop]: Abstraction has 150794 states and 222733 transitions. [2022-12-14 14:07:41,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:07:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 150794 states and 222733 transitions. [2022-12-14 14:07:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 14:07:42,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:42,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:07:42,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 14:07:42,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2129071238, now seen corresponding path program 1 times [2022-12-14 14:07:42,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:42,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106297776] [2022-12-14 14:07:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:42,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 14:07:42,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:42,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106297776] [2022-12-14 14:07:42,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106297776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:42,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691069373] [2022-12-14 14:07:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:42,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:42,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:42,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:42,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:07:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:07:42,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 14:07:42,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:07:42,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691069373] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:42,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:07:42,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:07:42,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653778329] [2022-12-14 14:07:42,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:42,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:42,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:42,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:42,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:07:42,517 INFO L87 Difference]: Start difference. First operand 150794 states and 222733 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:07:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:47,028 INFO L93 Difference]: Finished difference Result 228242 states and 342291 transitions. [2022-12-14 14:07:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 178 [2022-12-14 14:07:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:47,427 INFO L225 Difference]: With dead ends: 228242 [2022-12-14 14:07:47,428 INFO L226 Difference]: Without dead ends: 151310 [2022-12-14 14:07:47,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:07:47,576 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 199 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:47,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 552 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151310 states. [2022-12-14 14:07:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151310 to 150282. [2022-12-14 14:07:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150282 states, 128259 states have (on average 1.4770347499980507) internal successors, (189443), 128773 states have internal predecessors, (189443), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 14:07:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150282 states to 150282 states and 220173 transitions. [2022-12-14 14:07:52,176 INFO L78 Accepts]: Start accepts. Automaton has 150282 states and 220173 transitions. Word has length 178 [2022-12-14 14:07:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:52,176 INFO L495 AbstractCegarLoop]: Abstraction has 150282 states and 220173 transitions. [2022-12-14 14:07:52,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:07:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 150282 states and 220173 transitions. [2022-12-14 14:07:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 14:07:52,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:52,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:52,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:07:52,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 14:07:52,654 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:52,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1128517064, now seen corresponding path program 1 times [2022-12-14 14:07:52,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:52,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13382481] [2022-12-14 14:07:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:52,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 14:07:52,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:52,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13382481] [2022-12-14 14:07:52,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13382481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:52,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339454869] [2022-12-14 14:07:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:52,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:52,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:52,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:07:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:53,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:07:53,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 14:07:53,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:07:53,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339454869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:53,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:07:53,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:07:53,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883490476] [2022-12-14 14:07:53,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:53,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:07:53,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:53,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:07:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:07:53,073 INFO L87 Difference]: Start difference. First operand 150282 states and 220173 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:07:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:58,111 INFO L93 Difference]: Finished difference Result 267400 states and 385546 transitions. [2022-12-14 14:07:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:07:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 178 [2022-12-14 14:07:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:58,590 INFO L225 Difference]: With dead ends: 267400 [2022-12-14 14:07:58,590 INFO L226 Difference]: Without dead ends: 191236 [2022-12-14 14:07:58,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:07:58,765 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 210 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:58,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 282 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:58,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191236 states. [2022-12-14 14:08:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191236 to 191236. [2022-12-14 14:08:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191236 states, 166145 states have (on average 1.423726263203828) internal successors, (236545), 166659 states have internal predecessors, (236545), 16388 states have call successors, (16388), 8703 states have call predecessors, (16388), 8702 states have return successors, (16386), 15874 states have call predecessors, (16386), 16386 states have call successors, (16386) [2022-12-14 14:08:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191236 states to 191236 states and 269319 transitions. [2022-12-14 14:08:04,576 INFO L78 Accepts]: Start accepts. Automaton has 191236 states and 269319 transitions. Word has length 178 [2022-12-14 14:08:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:08:04,577 INFO L495 AbstractCegarLoop]: Abstraction has 191236 states and 269319 transitions. [2022-12-14 14:08:04,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:08:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 191236 states and 269319 transitions. [2022-12-14 14:08:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 14:08:04,879 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:08:04,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:08:04,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:08:05,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:08:05,081 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:08:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:08:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash 823047163, now seen corresponding path program 1 times [2022-12-14 14:08:05,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:08:05,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270275856] [2022-12-14 14:08:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:08:05,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:08:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:08:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 14:08:05,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:08:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270275856] [2022-12-14 14:08:05,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270275856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:08:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051415714] [2022-12-14 14:08:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:08:05,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:08:05,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:08:05,283 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:08:05,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:08:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:08:05,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:08:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:08:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:08:05,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:08:05,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051415714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:08:05,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:08:05,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 14:08:05,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206930387] [2022-12-14 14:08:05,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:08:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:08:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:08:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:08:05,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:08:05,505 INFO L87 Difference]: Start difference. First operand 191236 states and 269319 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:08:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:08:15,948 INFO L93 Difference]: Finished difference Result 584442 states and 821755 transitions. [2022-12-14 14:08:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:08:15,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 179 [2022-12-14 14:08:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:08:17,029 INFO L225 Difference]: With dead ends: 584442 [2022-12-14 14:08:17,030 INFO L226 Difference]: Without dead ends: 393212 [2022-12-14 14:08:17,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:08:17,327 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 240 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:08:17,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 996 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:08:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393212 states. [2022-12-14 14:08:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393212 to 392696. [2022-12-14 14:08:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392696 states, 342525 states have (on average 1.4140544485803956) internal successors, (484349), 344063 states have internal predecessors, (484349), 32256 states have call successors, (32256), 17403 states have call predecessors, (32256), 17914 states have return successors, (33790), 31230 states have call predecessors, (33790), 32254 states have call successors, (33790) [2022-12-14 14:08:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392696 states to 392696 states and 550395 transitions. [2022-12-14 14:08:30,594 INFO L78 Accepts]: Start accepts. Automaton has 392696 states and 550395 transitions. Word has length 179 [2022-12-14 14:08:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:08:30,595 INFO L495 AbstractCegarLoop]: Abstraction has 392696 states and 550395 transitions. [2022-12-14 14:08:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:08:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 392696 states and 550395 transitions. [2022-12-14 14:08:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 14:08:31,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:08:31,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:08:31,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:08:31,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:08:31,637 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:08:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:08:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash 589417542, now seen corresponding path program 1 times [2022-12-14 14:08:31,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:08:31,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356892147] [2022-12-14 14:08:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:08:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:08:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:08:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 14:08:31,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:08:31,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356892147] [2022-12-14 14:08:31,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356892147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:08:31,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076942169] [2022-12-14 14:08:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:08:31,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:08:31,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:08:31,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:08:31,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:08:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:08:32,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:08:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:08:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:08:32,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:08:32,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076942169] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:08:32,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:08:32,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:08:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594683498] [2022-12-14 14:08:32,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:08:32,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:08:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:08:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:08:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:08:32,053 INFO L87 Difference]: Start difference. First operand 392696 states and 550395 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:08:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:08:48,489 INFO L93 Difference]: Finished difference Result 913892 states and 1304544 transitions. [2022-12-14 14:08:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:08:48,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 14:08:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:08:50,438 INFO L225 Difference]: With dead ends: 913892 [2022-12-14 14:08:50,439 INFO L226 Difference]: Without dead ends: 521202 [2022-12-14 14:08:51,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:08:51,020 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 112 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 418 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 14:08:51,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 418 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:08:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521202 states. [2022-12-14 14:09:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521202 to 437252. [2022-12-14 14:09:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437252 states, 385027 states have (on average 1.444145475512107) internal successors, (556035), 386567 states have internal predecessors, (556035), 33283 states have call successors, (33283), 18430 states have call predecessors, (33283), 18941 states have return successors, (34817), 32255 states have call predecessors, (34817), 33281 states have call successors, (34817) [2022-12-14 14:09:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437252 states to 437252 states and 624135 transitions. [2022-12-14 14:09:07,296 INFO L78 Accepts]: Start accepts. Automaton has 437252 states and 624135 transitions. Word has length 179 [2022-12-14 14:09:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:07,296 INFO L495 AbstractCegarLoop]: Abstraction has 437252 states and 624135 transitions. [2022-12-14 14:09:07,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:09:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 437252 states and 624135 transitions. [2022-12-14 14:09:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 14:09:08,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:08,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:08,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 14:09:08,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 14:09:08,224 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1934887093, now seen corresponding path program 2 times [2022-12-14 14:09:08,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:08,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498774630] [2022-12-14 14:09:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:08,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 63 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 14:09:08,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:08,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498774630] [2022-12-14 14:09:08,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498774630] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:09:08,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39457125] [2022-12-14 14:09:08,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:09:08,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:08,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:09:08,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:09:08,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:09:08,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:09:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:09:08,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:09:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:09:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 14:09:08,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:09:08,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39457125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:08,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:09:08,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:09:08,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083469973] [2022-12-14 14:09:08,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:08,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:08,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:08,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:09:08,738 INFO L87 Difference]: Start difference. First operand 437252 states and 624135 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:09:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:26,246 INFO L93 Difference]: Finished difference Result 846086 states and 1220609 transitions. [2022-12-14 14:09:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 179 [2022-12-14 14:09:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:28,096 INFO L225 Difference]: With dead ends: 846086 [2022-12-14 14:09:28,096 INFO L226 Difference]: Without dead ends: 624258 [2022-12-14 14:09:28,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:09:28,470 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 163 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:28,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 553 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:09:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624258 states. [2022-12-14 14:09:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624258 to 520196. [2022-12-14 14:09:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520196 states, 463875 states have (on average 1.483440582053355) internal successors, (688131), 465415 states have internal predecessors, (688131), 35331 states have call successors, (35331), 20478 states have call predecessors, (35331), 20989 states have return successors, (36865), 34303 states have call predecessors, (36865), 35329 states have call successors, (36865) [2022-12-14 14:09:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520196 states to 520196 states and 760327 transitions. [2022-12-14 14:09:48,292 INFO L78 Accepts]: Start accepts. Automaton has 520196 states and 760327 transitions. Word has length 179 [2022-12-14 14:09:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:48,293 INFO L495 AbstractCegarLoop]: Abstraction has 520196 states and 760327 transitions. [2022-12-14 14:09:48,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:09:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 520196 states and 760327 transitions. [2022-12-14 14:09:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 14:09:49,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:49,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:09:49,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 14:09:49,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 14:09:49,363 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1157611752, now seen corresponding path program 1 times [2022-12-14 14:09:49,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:49,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531300835] [2022-12-14 14:09:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:49,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 14:09:49,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531300835] [2022-12-14 14:09:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531300835] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:09:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393069827] [2022-12-14 14:09:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:49,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:49,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:09:49,549 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:09:49,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:09:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:49,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:09:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:09:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:09:49,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:09:49,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393069827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:49,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:09:49,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 14:09:49,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995225754] [2022-12-14 14:09:49,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:49,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:09:49,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:49,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:09:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:09:49,785 INFO L87 Difference]: Start difference. First operand 520196 states and 760327 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:10:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:18,208 INFO L93 Difference]: Finished difference Result 1291380 states and 1887349 transitions. [2022-12-14 14:10:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:10:18,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 180 [2022-12-14 14:10:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:20,433 INFO L225 Difference]: With dead ends: 1291380 [2022-12-14 14:10:20,433 INFO L226 Difference]: Without dead ends: 771190 [2022-12-14 14:10:21,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:10:21,151 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 636 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:21,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 576 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:10:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771190 states. [2022-12-14 14:10:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771190 to 771186. [2022-12-14 14:10:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771186 states, 687229 states have (on average 1.4749508533545588) internal successors, (1013629), 689537 states have internal predecessors, (1013629), 52477 states have call successors, (52477), 30712 states have call predecessors, (52477), 31479 states have return successors, (54779), 50937 states have call predecessors, (54779), 52475 states have call successors, (54779) [2022-12-14 14:10:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771186 states to 771186 states and 1120885 transitions. [2022-12-14 14:10:53,934 INFO L78 Accepts]: Start accepts. Automaton has 771186 states and 1120885 transitions. Word has length 180 [2022-12-14 14:10:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:53,934 INFO L495 AbstractCegarLoop]: Abstraction has 771186 states and 1120885 transitions. [2022-12-14 14:10:53,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:10:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 771186 states and 1120885 transitions. [2022-12-14 14:10:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 14:10:55,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:55,474 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:10:55,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 14:10:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:55,675 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1156982364, now seen corresponding path program 1 times [2022-12-14 14:10:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:55,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148816822] [2022-12-14 14:10:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 14:10:56,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148816822] [2022-12-14 14:10:56,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148816822] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449112192] [2022-12-14 14:10:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:56,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:56,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:56,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:56,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e888a6-8d03-4b91-a75f-669ace232630/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:10:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:10:56,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:10:56,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:56,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449112192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:56,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:56,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 14:10:56,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14358849] [2022-12-14 14:10:56,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:10:56,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:10:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:10:56,228 INFO L87 Difference]: Start difference. First operand 771186 states and 1120885 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)