./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW --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 1fc4175868fd9160b7d31310c312f3c40c885306cd37c45505af16cdc713f79b --- 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-4e7fbc6 [2022-11-23 14:23:36,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:23:36,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:23:36,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:23:36,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:23:36,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:23:36,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:23:36,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:23:36,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:23:36,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:23:36,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:23:36,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:23:36,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:23:36,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:23:36,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:23:36,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:23:36,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:23:36,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:23:36,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:23:36,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:23:36,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:23:36,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:23:36,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:23:36,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:23:36,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:23:36,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:23:36,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:23:36,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:23:36,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:23:36,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:23:36,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:23:36,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:23:36,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:23:36,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:23:36,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:23:36,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:23:36,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:23:36,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:23:36,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:23:36,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:23:36,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:23:36,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:23:36,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:23:36,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:23:36,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:23:36,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:23:36,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:23:36,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:23:36,390 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:23:36,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:23:36,391 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:23:36,391 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:23:36,392 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:23:36,393 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:23:36,393 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:23:36,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:23:36,393 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:23:36,393 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:23:36,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:23:36,394 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:23:36,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:23:36,395 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:23:36,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:23:36,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:23:36,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:23:36,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:23:36,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:23:36,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:23:36,396 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:23:36,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:23:36,397 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:23:36,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:23:36,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:23:36,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:23:36,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:23:36,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:23:36,398 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:23:36,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:23:36,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:23:36,399 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:23:36,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:23:36,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:23:36,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:23:36,400 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_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fc4175868fd9160b7d31310c312f3c40c885306cd37c45505af16cdc713f79b [2022-11-23 14:23:36,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:23:36,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:23:36,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:23:36,727 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:23:36,728 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:23:36,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2022-11-23 14:23:39,752 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:23:40,010 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:23:40,011 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2022-11-23 14:23:40,024 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/data/8f52f0023/15adc544ab3e4cc09675aab48ecc2f0e/FLAG6f5f85eab [2022-11-23 14:23:40,040 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/data/8f52f0023/15adc544ab3e4cc09675aab48ecc2f0e [2022-11-23 14:23:40,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:23:40,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:23:40,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:23:40,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:23:40,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:23:40,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd60b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40, skipping insertion in model container [2022-11-23 14:23:40,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:23:40,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:23:40,245 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_f33b3ef1-f8d4-459e-a7f4-aadf22321901/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c[913,926] [2022-11-23 14:23:40,296 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_f33b3ef1-f8d4-459e-a7f4-aadf22321901/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c[5977,5990] [2022-11-23 14:23:40,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:23:40,340 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:23:40,353 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_f33b3ef1-f8d4-459e-a7f4-aadf22321901/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c[913,926] [2022-11-23 14:23:40,371 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_f33b3ef1-f8d4-459e-a7f4-aadf22321901/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-2.c[5977,5990] [2022-11-23 14:23:40,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:23:40,410 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:23:40,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40 WrapperNode [2022-11-23 14:23:40,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:23:40,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:23:40,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:23:40,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:23:40,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,487 INFO L138 Inliner]: procedures = 50, calls = 52, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 422 [2022-11-23 14:23:40,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:23:40,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:23:40,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:23:40,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:23:40,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,546 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:23:40,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:23:40,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:23:40,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:23:40,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (1/1) ... [2022-11-23 14:23:40,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:23:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:40,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:23:40,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:23:40,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:23:40,664 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 14:23:40,665 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 14:23:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-23 14:23:40,665 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-23 14:23:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 14:23:40,666 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 14:23:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 14:23:40,666 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 14:23:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 14:23:40,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 14:23:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 14:23:40,667 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 14:23:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 14:23:40,667 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 14:23:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:23:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 14:23:40,668 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 14:23:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:23:40,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:23:40,669 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 14:23:40,669 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 14:23:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-23 14:23:40,670 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-23 14:23:40,816 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:23:40,818 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:23:41,319 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:23:41,510 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:23:41,510 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-23 14:23:41,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:41 BoogieIcfgContainer [2022-11-23 14:23:41,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:23:41,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:23:41,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:23:41,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:23:41,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:40" (1/3) ... [2022-11-23 14:23:41,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1e0f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:41, skipping insertion in model container [2022-11-23 14:23:41,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:40" (2/3) ... [2022-11-23 14:23:41,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1e0f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:41, skipping insertion in model container [2022-11-23 14:23:41,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:41" (3/3) ... [2022-11-23 14:23:41,522 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.01.cil-2.c [2022-11-23 14:23:41,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:23:41,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:23:41,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:23:41,604 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;@34895951, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:23:41,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:23:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 88 states have (on average 1.5340909090909092) internal successors, (135), 95 states have internal predecessors, (135), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-23 14:23:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 14:23:41,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:41,622 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] [2022-11-23 14:23:41,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2115007351, now seen corresponding path program 1 times [2022-11-23 14:23:41,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:41,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297557977] [2022-11-23 14:23:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:41,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:41,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:41,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297557977] [2022-11-23 14:23:41,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297557977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:41,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:41,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:23:41,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206791160] [2022-11-23 14:23:42,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:42,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:23:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:42,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:23:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:42,057 INFO L87 Difference]: Start difference. First operand has 124 states, 88 states have (on average 1.5340909090909092) internal successors, (135), 95 states have internal predecessors, (135), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:23:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:42,232 INFO L93 Difference]: Finished difference Result 280 states and 410 transitions. [2022-11-23 14:23:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-23 14:23:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:42,254 INFO L225 Difference]: With dead ends: 280 [2022-11-23 14:23:42,256 INFO L226 Difference]: Without dead ends: 156 [2022-11-23 14:23:42,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:42,267 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 146 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:42,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 210 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-23 14:23:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-11-23 14:23:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 114 states have (on average 1.4210526315789473) internal successors, (162), 118 states have internal predecessors, (162), 26 states have call successors, (26), 12 states have call predecessors, (26), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 14:23:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 210 transitions. [2022-11-23 14:23:42,337 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 210 transitions. Word has length 28 [2022-11-23 14:23:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:42,337 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 210 transitions. [2022-11-23 14:23:42,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:23:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 210 transitions. [2022-11-23 14:23:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 14:23:42,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:42,356 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] [2022-11-23 14:23:42,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:23:42,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash -346560277, now seen corresponding path program 1 times [2022-11-23 14:23:42,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:42,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138877401] [2022-11-23 14:23:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:42,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:42,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:42,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138877401] [2022-11-23 14:23:42,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138877401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:42,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:42,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:23:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039356652] [2022-11-23 14:23:42,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:23:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:23:42,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:42,489 INFO L87 Difference]: Start difference. First operand 152 states and 210 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:23:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:42,604 INFO L93 Difference]: Finished difference Result 308 states and 427 transitions. [2022-11-23 14:23:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-23 14:23:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:42,607 INFO L225 Difference]: With dead ends: 308 [2022-11-23 14:23:42,608 INFO L226 Difference]: Without dead ends: 227 [2022-11-23 14:23:42,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:42,610 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 144 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:42,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 195 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-23 14:23:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2022-11-23 14:23:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 174 states have (on average 1.396551724137931) internal successors, (243), 178 states have internal predecessors, (243), 33 states have call successors, (33), 16 states have call predecessors, (33), 14 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-23 14:23:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 305 transitions. [2022-11-23 14:23:42,649 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 305 transitions. Word has length 29 [2022-11-23 14:23:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:42,650 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 305 transitions. [2022-11-23 14:23:42,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:23:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 305 transitions. [2022-11-23 14:23:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:23:42,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:42,663 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] [2022-11-23 14:23:42,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:23:42,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:42,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1395719567, now seen corresponding path program 1 times [2022-11-23 14:23:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:42,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938849215] [2022-11-23 14:23:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:42,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:42,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938849215] [2022-11-23 14:23:42,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938849215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:42,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:42,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:23:42,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421999860] [2022-11-23 14:23:42,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:42,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:23:42,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:42,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:23:42,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:42,778 INFO L87 Difference]: Start difference. First operand 223 states and 305 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:23:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:42,915 INFO L93 Difference]: Finished difference Result 463 states and 633 transitions. [2022-11-23 14:23:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:42,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-23 14:23:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:42,921 INFO L225 Difference]: With dead ends: 463 [2022-11-23 14:23:42,921 INFO L226 Difference]: Without dead ends: 311 [2022-11-23 14:23:42,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:42,931 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 46 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 275 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 [2022-11-23 14:23:42,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 275 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:42,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-23 14:23:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 297. [2022-11-23 14:23:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 237 states have (on average 1.3839662447257384) internal successors, (328), 243 states have internal predecessors, (328), 39 states have call successors, (39), 21 states have call predecessors, (39), 19 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-23 14:23:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 402 transitions. [2022-11-23 14:23:42,980 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 402 transitions. Word has length 30 [2022-11-23 14:23:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:42,980 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 402 transitions. [2022-11-23 14:23:42,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:23:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 402 transitions. [2022-11-23 14:23:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:23:42,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:42,982 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] [2022-11-23 14:23:42,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:23:42,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:42,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1885094258, now seen corresponding path program 1 times [2022-11-23 14:23:42,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:42,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697919699] [2022-11-23 14:23:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:42,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:43,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697919699] [2022-11-23 14:23:43,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697919699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:43,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:43,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:23:43,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783509915] [2022-11-23 14:23:43,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:43,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:23:43,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:23:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:23:43,071 INFO L87 Difference]: Start difference. First operand 297 states and 402 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:23:43,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:43,343 INFO L93 Difference]: Finished difference Result 415 states and 571 transitions. [2022-11-23 14:23:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:23:43,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 35 [2022-11-23 14:23:43,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:43,349 INFO L225 Difference]: With dead ends: 415 [2022-11-23 14:23:43,350 INFO L226 Difference]: Without dead ends: 350 [2022-11-23 14:23:43,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:23:43,361 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 215 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:43,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 310 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:23:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-23 14:23:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2022-11-23 14:23:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 272 states have (on average 1.3602941176470589) internal successors, (370), 279 states have internal predecessors, (370), 50 states have call successors, (50), 27 states have call predecessors, (50), 25 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 14:23:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 466 transitions. [2022-11-23 14:23:43,411 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 466 transitions. Word has length 35 [2022-11-23 14:23:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:43,411 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 466 transitions. [2022-11-23 14:23:43,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:23:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 466 transitions. [2022-11-23 14:23:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 14:23:43,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:43,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:43,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:23:43,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1693445601, now seen corresponding path program 1 times [2022-11-23 14:23:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55059706] [2022-11-23 14:23:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:23:43,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:43,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55059706] [2022-11-23 14:23:43,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55059706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:43,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:43,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:23:43,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289360417] [2022-11-23 14:23:43,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:43,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:23:43,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:43,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:23:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:43,533 INFO L87 Difference]: Start difference. First operand 349 states and 466 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:23:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:43,639 INFO L93 Difference]: Finished difference Result 512 states and 684 transitions. [2022-11-23 14:23:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:43,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-11-23 14:23:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:43,643 INFO L225 Difference]: With dead ends: 512 [2022-11-23 14:23:43,643 INFO L226 Difference]: Without dead ends: 354 [2022-11-23 14:23:43,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:43,645 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 32 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:43,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 305 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-23 14:23:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 343. [2022-11-23 14:23:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 266 states have (on average 1.3383458646616542) internal successors, (356), 273 states have internal predecessors, (356), 50 states have call successors, (50), 27 states have call predecessors, (50), 25 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 14:23:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 452 transitions. [2022-11-23 14:23:43,691 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 452 transitions. Word has length 43 [2022-11-23 14:23:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:43,693 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 452 transitions. [2022-11-23 14:23:43,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:23:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 452 transitions. [2022-11-23 14:23:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:23:43,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:43,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:43,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:23:43,697 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash 92348433, now seen corresponding path program 1 times [2022-11-23 14:23:43,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:43,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111978231] [2022-11-23 14:23:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:23:43,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:43,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111978231] [2022-11-23 14:23:43,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111978231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:43,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:43,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:23:43,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624409340] [2022-11-23 14:23:43,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:23:43,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:43,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:23:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:43,784 INFO L87 Difference]: Start difference. First operand 343 states and 452 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:23:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:43,870 INFO L93 Difference]: Finished difference Result 592 states and 776 transitions. [2022-11-23 14:23:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:43,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-23 14:23:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:43,875 INFO L225 Difference]: With dead ends: 592 [2022-11-23 14:23:43,875 INFO L226 Difference]: Without dead ends: 389 [2022-11-23 14:23:43,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:43,877 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 129 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:43,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 192 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:23:43,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-23 14:23:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-11-23 14:23:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 305 states have (on average 1.3081967213114754) internal successors, (399), 312 states have internal predecessors, (399), 54 states have call successors, (54), 30 states have call predecessors, (54), 28 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-23 14:23:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 503 transitions. [2022-11-23 14:23:43,922 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 503 transitions. Word has length 46 [2022-11-23 14:23:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:43,924 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 503 transitions. [2022-11-23 14:23:43,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:23:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 503 transitions. [2022-11-23 14:23:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:23:43,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:43,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:43,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:23:43,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1767974607, now seen corresponding path program 1 times [2022-11-23 14:23:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:43,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866872431] [2022-11-23 14:23:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:43,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:23:44,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:44,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866872431] [2022-11-23 14:23:44,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866872431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:44,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:44,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:23:44,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611491541] [2022-11-23 14:23:44,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:23:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:23:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:23:44,048 INFO L87 Difference]: Start difference. First operand 389 states and 503 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:23:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:44,248 INFO L93 Difference]: Finished difference Result 429 states and 550 transitions. [2022-11-23 14:23:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:23:44,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-11-23 14:23:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:44,251 INFO L225 Difference]: With dead ends: 429 [2022-11-23 14:23:44,251 INFO L226 Difference]: Without dead ends: 426 [2022-11-23 14:23:44,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:23:44,253 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 242 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:44,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 190 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-23 14:23:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 388. [2022-11-23 14:23:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 305 states have (on average 1.301639344262295) internal successors, (397), 311 states have internal predecessors, (397), 53 states have call successors, (53), 30 states have call predecessors, (53), 28 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-23 14:23:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 500 transitions. [2022-11-23 14:23:44,292 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 500 transitions. Word has length 47 [2022-11-23 14:23:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:44,292 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 500 transitions. [2022-11-23 14:23:44,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:23:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 500 transitions. [2022-11-23 14:23:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:23:44,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:44,294 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:23:44,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:23:44,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1026748244, now seen corresponding path program 1 times [2022-11-23 14:23:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:44,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136734850] [2022-11-23 14:23:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:44,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:23:44,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:44,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136734850] [2022-11-23 14:23:44,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136734850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:23:44,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359174347] [2022-11-23 14:23:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:44,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:44,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:44,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:44,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:23:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:44,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:23:44,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:44,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:23:45,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359174347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:45,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818459336] [2022-11-23 14:23:45,174 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-23 14:23:45,175 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:45,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:45,183 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:45,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:47,091 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 75 for LOIs [2022-11-23 14:23:47,099 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 90 for LOIs [2022-11-23 14:23:47,111 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 196 for LOIs [2022-11-23 14:23:48,264 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:58,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7941#(and (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= 1 ~c_dr_i~0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= ~E_1~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:58,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:58,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:23:58,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 14:23:58,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731260508] [2022-11-23 14:23:58,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:58,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:23:58,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:23:58,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:23:58,616 INFO L87 Difference]: Start difference. First operand 388 states and 500 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 14:23:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:58,951 INFO L93 Difference]: Finished difference Result 831 states and 1068 transitions. [2022-11-23 14:23:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:23:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-23 14:23:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:58,959 INFO L225 Difference]: With dead ends: 831 [2022-11-23 14:23:58,959 INFO L226 Difference]: Without dead ends: 828 [2022-11-23 14:23:58,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:23:58,962 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 390 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:58,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 541 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:23:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-23 14:23:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 597. [2022-11-23 14:23:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 482 states have (on average 1.3070539419087137) internal successors, (630), 490 states have internal predecessors, (630), 72 states have call successors, (72), 43 states have call predecessors, (72), 41 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-23 14:23:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 771 transitions. [2022-11-23 14:23:59,044 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 771 transitions. Word has length 48 [2022-11-23 14:23:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:59,045 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 771 transitions. [2022-11-23 14:23:59,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 14:23:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 771 transitions. [2022-11-23 14:23:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 14:23:59,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:59,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:59,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 14:23:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:59,253 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:59,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1361579102, now seen corresponding path program 1 times [2022-11-23 14:23:59,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:59,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574062855] [2022-11-23 14:23:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:23:59,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:59,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574062855] [2022-11-23 14:23:59,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574062855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:59,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:59,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:23:59,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006091013] [2022-11-23 14:23:59,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:59,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:23:59,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:23:59,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:23:59,569 INFO L87 Difference]: Start difference. First operand 597 states and 771 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:23:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:59,924 INFO L93 Difference]: Finished difference Result 829 states and 1074 transitions. [2022-11-23 14:23:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:23:59,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2022-11-23 14:23:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:59,929 INFO L225 Difference]: With dead ends: 829 [2022-11-23 14:23:59,929 INFO L226 Difference]: Without dead ends: 713 [2022-11-23 14:23:59,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:23:59,933 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 254 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:59,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 325 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:23:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-11-23 14:24:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 697. [2022-11-23 14:24:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 550 states have (on average 1.3) internal successors, (715), 559 states have internal predecessors, (715), 92 states have call successors, (92), 55 states have call predecessors, (92), 53 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-23 14:24:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 896 transitions. [2022-11-23 14:24:00,014 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 896 transitions. Word has length 60 [2022-11-23 14:24:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:00,015 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 896 transitions. [2022-11-23 14:24:00,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:24:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 896 transitions. [2022-11-23 14:24:00,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:24:00,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:00,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:00,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:24:00,019 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1328661265, now seen corresponding path program 1 times [2022-11-23 14:24:00,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:00,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389061093] [2022-11-23 14:24:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:00,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:24:00,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:00,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389061093] [2022-11-23 14:24:00,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389061093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:00,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:00,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:24:00,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234937524] [2022-11-23 14:24:00,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:00,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:00,072 INFO L87 Difference]: Start difference. First operand 697 states and 896 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:24:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:00,176 INFO L93 Difference]: Finished difference Result 865 states and 1112 transitions. [2022-11-23 14:24:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:00,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-23 14:24:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:00,180 INFO L225 Difference]: With dead ends: 865 [2022-11-23 14:24:00,180 INFO L226 Difference]: Without dead ends: 747 [2022-11-23 14:24:00,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:00,181 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 27 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:00,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 300 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-11-23 14:24:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 717. [2022-11-23 14:24:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 566 states have (on average 1.302120141342756) internal successors, (737), 575 states have internal predecessors, (737), 94 states have call successors, (94), 57 states have call predecessors, (94), 55 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-23 14:24:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 922 transitions. [2022-11-23 14:24:00,246 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 922 transitions. Word has length 61 [2022-11-23 14:24:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:00,246 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 922 transitions. [2022-11-23 14:24:00,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:24:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 922 transitions. [2022-11-23 14:24:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:24:00,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:00,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-23 14:24:00,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:24:00,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:00,250 INFO L85 PathProgramCache]: Analyzing trace with hash 563028075, now seen corresponding path program 2 times [2022-11-23 14:24:00,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:00,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852236798] [2022-11-23 14:24:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:00,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:24:00,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:00,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852236798] [2022-11-23 14:24:00,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852236798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:00,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:00,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:24:00,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347525995] [2022-11-23 14:24:00,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:00,288 INFO L87 Difference]: Start difference. First operand 717 states and 922 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 14:24:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:00,394 INFO L93 Difference]: Finished difference Result 1047 states and 1355 transitions. [2022-11-23 14:24:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:00,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-11-23 14:24:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:00,397 INFO L225 Difference]: With dead ends: 1047 [2022-11-23 14:24:00,397 INFO L226 Difference]: Without dead ends: 659 [2022-11-23 14:24:00,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:00,399 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 142 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:00,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 205 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-23 14:24:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 650. [2022-11-23 14:24:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 509 states have (on average 1.2888015717092338) internal successors, (656), 519 states have internal predecessors, (656), 88 states have call successors, (88), 53 states have call predecessors, (88), 51 states have return successors, (85), 78 states have call predecessors, (85), 85 states have call successors, (85) [2022-11-23 14:24:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 829 transitions. [2022-11-23 14:24:00,458 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 829 transitions. Word has length 61 [2022-11-23 14:24:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:00,458 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 829 transitions. [2022-11-23 14:24:00,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 14:24:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 829 transitions. [2022-11-23 14:24:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 14:24:00,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:00,461 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:24:00,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:24:00,461 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash 469272451, now seen corresponding path program 1 times [2022-11-23 14:24:00,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:00,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446374960] [2022-11-23 14:24:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:00,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:24:00,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:00,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446374960] [2022-11-23 14:24:00,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446374960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:00,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:00,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:24:00,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546724914] [2022-11-23 14:24:00,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:00,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:00,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:00,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:00,504 INFO L87 Difference]: Start difference. First operand 650 states and 829 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-11-23 14:24:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:00,630 INFO L93 Difference]: Finished difference Result 1006 states and 1289 transitions. [2022-11-23 14:24:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 77 [2022-11-23 14:24:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:00,634 INFO L225 Difference]: With dead ends: 1006 [2022-11-23 14:24:00,634 INFO L226 Difference]: Without dead ends: 769 [2022-11-23 14:24:00,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:00,636 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 128 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:00,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 241 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-11-23 14:24:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 762. [2022-11-23 14:24:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 587 states have (on average 1.2793867120954003) internal successors, (751), 598 states have internal predecessors, (751), 109 states have call successors, (109), 66 states have call predecessors, (109), 64 states have return successors, (106), 98 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-23 14:24:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 966 transitions. [2022-11-23 14:24:00,720 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 966 transitions. Word has length 77 [2022-11-23 14:24:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:00,720 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 966 transitions. [2022-11-23 14:24:00,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-11-23 14:24:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 966 transitions. [2022-11-23 14:24:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:24:00,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:00,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-23 14:24:00,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:24:00,729 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1714106864, now seen corresponding path program 1 times [2022-11-23 14:24:00,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:00,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073180885] [2022-11-23 14:24:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:00,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:24:00,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073180885] [2022-11-23 14:24:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073180885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:00,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:00,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:24:00,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963330533] [2022-11-23 14:24:00,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:00,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:00,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:00,773 INFO L87 Difference]: Start difference. First operand 762 states and 966 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 14:24:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:00,876 INFO L93 Difference]: Finished difference Result 889 states and 1125 transitions. [2022-11-23 14:24:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-11-23 14:24:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:00,879 INFO L225 Difference]: With dead ends: 889 [2022-11-23 14:24:00,879 INFO L226 Difference]: Without dead ends: 355 [2022-11-23 14:24:00,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:00,881 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 27 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:00,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 276 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-23 14:24:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2022-11-23 14:24:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 244 states have (on average 1.2663934426229508) internal successors, (309), 249 states have internal predecessors, (309), 71 states have call successors, (71), 40 states have call predecessors, (71), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-23 14:24:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 449 transitions. [2022-11-23 14:24:00,922 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 449 transitions. Word has length 73 [2022-11-23 14:24:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:00,923 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 449 transitions. [2022-11-23 14:24:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 14:24:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 449 transitions. [2022-11-23 14:24:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 14:24:00,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:00,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:00,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:24:00,925 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:00,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1810930104, now seen corresponding path program 1 times [2022-11-23 14:24:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:00,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437295478] [2022-11-23 14:24:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:00,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:24:01,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:01,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437295478] [2022-11-23 14:24:01,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437295478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:01,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544485708] [2022-11-23 14:24:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:01,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:01,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:01,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:01,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:24:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:24:01,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:24:01,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:24:01,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544485708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:01,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:24:01,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:24:01,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953965128] [2022-11-23 14:24:01,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:01,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:24:01,264 INFO L87 Difference]: Start difference. First operand 355 states and 449 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-23 14:24:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:01,410 INFO L93 Difference]: Finished difference Result 597 states and 773 transitions. [2022-11-23 14:24:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:01,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 88 [2022-11-23 14:24:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:01,413 INFO L225 Difference]: With dead ends: 597 [2022-11-23 14:24:01,413 INFO L226 Difference]: Without dead ends: 361 [2022-11-23 14:24:01,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:24:01,414 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 65 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:01,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 178 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:24:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-23 14:24:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 353. [2022-11-23 14:24:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 242 states have (on average 1.2272727272727273) internal successors, (297), 247 states have internal predecessors, (297), 71 states have call successors, (71), 40 states have call predecessors, (71), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-23 14:24:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 437 transitions. [2022-11-23 14:24:01,472 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 437 transitions. Word has length 88 [2022-11-23 14:24:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:01,473 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 437 transitions. [2022-11-23 14:24:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2022-11-23 14:24:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 437 transitions. [2022-11-23 14:24:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 14:24:01,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:01,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:01,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:24:01,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:24:01,681 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash 119487238, now seen corresponding path program 1 times [2022-11-23 14:24:01,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:01,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33295766] [2022-11-23 14:24:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:01,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:24:01,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:01,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33295766] [2022-11-23 14:24:01,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33295766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:01,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684680552] [2022-11-23 14:24:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:01,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:01,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:01,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:01,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:24:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:01,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:24:01,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:24:01,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:24:01,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684680552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:01,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:24:01,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:24:01,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008625882] [2022-11-23 14:24:01,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:01,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:02,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:24:02,000 INFO L87 Difference]: Start difference. First operand 353 states and 437 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-23 14:24:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:02,081 INFO L93 Difference]: Finished difference Result 647 states and 799 transitions. [2022-11-23 14:24:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 88 [2022-11-23 14:24:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:02,084 INFO L225 Difference]: With dead ends: 647 [2022-11-23 14:24:02,085 INFO L226 Difference]: Without dead ends: 414 [2022-11-23 14:24:02,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:24:02,086 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 74 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:02,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 97 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-23 14:24:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-11-23 14:24:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 293 states have (on average 1.1979522184300342) internal successors, (351), 298 states have internal predecessors, (351), 73 states have call successors, (73), 48 states have call predecessors, (73), 47 states have return successors, (71), 68 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-23 14:24:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 495 transitions. [2022-11-23 14:24:02,155 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 495 transitions. Word has length 88 [2022-11-23 14:24:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:02,155 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 495 transitions. [2022-11-23 14:24:02,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-23 14:24:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 495 transitions. [2022-11-23 14:24:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 14:24:02,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:02,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:02,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:24:02,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:24:02,364 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash 132674569, now seen corresponding path program 1 times [2022-11-23 14:24:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:02,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161161283] [2022-11-23 14:24:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:02,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:24:02,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:02,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161161283] [2022-11-23 14:24:02,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161161283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:02,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206184305] [2022-11-23 14:24:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:02,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:02,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:02,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:02,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:24:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:02,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:24:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:24:02,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:24:02,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206184305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:02,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:24:02,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 14:24:02,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703132748] [2022-11-23 14:24:02,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:02,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:02,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:02,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:24:02,708 INFO L87 Difference]: Start difference. First operand 414 states and 495 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2022-11-23 14:24:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:02,814 INFO L93 Difference]: Finished difference Result 966 states and 1155 transitions. [2022-11-23 14:24:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 89 [2022-11-23 14:24:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:02,818 INFO L225 Difference]: With dead ends: 966 [2022-11-23 14:24:02,818 INFO L226 Difference]: Without dead ends: 559 [2022-11-23 14:24:02,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:24:02,820 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 39 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:02,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 159 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-11-23 14:24:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 450. [2022-11-23 14:24:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 319 states have (on average 1.2006269592476488) internal successors, (383), 325 states have internal predecessors, (383), 78 states have call successors, (78), 53 states have call predecessors, (78), 52 states have return successors, (76), 72 states have call predecessors, (76), 76 states have call successors, (76) [2022-11-23 14:24:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 537 transitions. [2022-11-23 14:24:02,886 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 537 transitions. Word has length 89 [2022-11-23 14:24:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:02,887 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 537 transitions. [2022-11-23 14:24:02,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2022-11-23 14:24:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 537 transitions. [2022-11-23 14:24:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 14:24:02,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:02,890 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:02,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:24:03,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:24:03,097 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1476981626, now seen corresponding path program 1 times [2022-11-23 14:24:03,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:03,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330060503] [2022-11-23 14:24:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:03,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 14:24:03,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:03,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330060503] [2022-11-23 14:24:03,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330060503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:03,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63993212] [2022-11-23 14:24:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:03,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:03,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:03,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:24:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:24:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:24:03,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:24:03,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63993212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:03,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:24:03,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:24:03,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058960307] [2022-11-23 14:24:03,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:03,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:03,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:03,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:03,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:24:03,318 INFO L87 Difference]: Start difference. First operand 450 states and 537 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-11-23 14:24:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:03,446 INFO L93 Difference]: Finished difference Result 847 states and 1016 transitions. [2022-11-23 14:24:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 89 [2022-11-23 14:24:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:03,457 INFO L225 Difference]: With dead ends: 847 [2022-11-23 14:24:03,457 INFO L226 Difference]: Without dead ends: 553 [2022-11-23 14:24:03,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:24:03,460 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 42 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:03,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 188 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:03,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-11-23 14:24:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 484. [2022-11-23 14:24:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 345 states have (on average 1.208695652173913) internal successors, (417), 351 states have internal predecessors, (417), 82 states have call successors, (82), 57 states have call predecessors, (82), 56 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-23 14:24:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 579 transitions. [2022-11-23 14:24:03,554 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 579 transitions. Word has length 89 [2022-11-23 14:24:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:03,554 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 579 transitions. [2022-11-23 14:24:03,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-11-23 14:24:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 579 transitions. [2022-11-23 14:24:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 14:24:03,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:03,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:03,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:24:03,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:24:03,757 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:03,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1931370246, now seen corresponding path program 1 times [2022-11-23 14:24:03,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:03,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134967344] [2022-11-23 14:24:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:03,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:24:03,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:03,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134967344] [2022-11-23 14:24:03,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134967344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:03,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:03,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:24:03,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256845302] [2022-11-23 14:24:03,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:24:03,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:24:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:24:03,905 INFO L87 Difference]: Start difference. First operand 484 states and 579 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 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) [2022-11-23 14:24:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:04,160 INFO L93 Difference]: Finished difference Result 1228 states and 1477 transitions. [2022-11-23 14:24:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:24:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 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 90 [2022-11-23 14:24:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:04,166 INFO L225 Difference]: With dead ends: 1228 [2022-11-23 14:24:04,166 INFO L226 Difference]: Without dead ends: 978 [2022-11-23 14:24:04,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:24:04,168 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 137 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:04,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 243 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:24:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-23 14:24:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 782. [2022-11-23 14:24:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 557 states have (on average 1.2118491921005385) internal successors, (675), 562 states have internal predecessors, (675), 133 states have call successors, (133), 92 states have call predecessors, (133), 91 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-11-23 14:24:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 939 transitions. [2022-11-23 14:24:04,307 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 939 transitions. Word has length 90 [2022-11-23 14:24:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:04,307 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 939 transitions. [2022-11-23 14:24:04,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 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) [2022-11-23 14:24:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 939 transitions. [2022-11-23 14:24:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-23 14:24:04,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:04,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:04,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:24:04,310 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash -784450633, now seen corresponding path program 1 times [2022-11-23 14:24:04,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:04,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586015116] [2022-11-23 14:24:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:04,328 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:24:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:04,400 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:24:04,402 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:24:04,404 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-23 14:24:04,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-23 14:24:04,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:24:04,410 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:04,416 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:24:04,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:24:04 BoogieIcfgContainer [2022-11-23 14:24:04,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:24:04,545 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:24:04,546 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:24:04,546 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:24:04,547 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:41" (3/4) ... [2022-11-23 14:24:04,552 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 14:24:04,645 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:24:04,646 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:24:04,646 INFO L158 Benchmark]: Toolchain (without parser) took 24602.98ms. Allocated memory was 151.0MB in the beginning and 272.6MB in the end (delta: 121.6MB). Free memory was 120.0MB in the beginning and 192.2MB in the end (delta: -72.2MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. [2022-11-23 14:24:04,647 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 90.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:24:04,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 366.45ms. Allocated memory is still 151.0MB. Free memory was 120.0MB in the beginning and 104.1MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 14:24:04,647 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.96ms. Allocated memory is still 151.0MB. Free memory was 104.1MB in the beginning and 101.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:24:04,648 INFO L158 Benchmark]: Boogie Preprocessor took 77.11ms. Allocated memory is still 151.0MB. Free memory was 101.3MB in the beginning and 98.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:24:04,648 INFO L158 Benchmark]: RCFGBuilder took 944.55ms. Allocated memory is still 151.0MB. Free memory was 98.6MB in the beginning and 81.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 14:24:04,648 INFO L158 Benchmark]: TraceAbstraction took 23029.32ms. Allocated memory was 151.0MB in the beginning and 272.6MB in the end (delta: 121.6MB). Free memory was 80.0MB in the beginning and 203.7MB in the end (delta: -123.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:24:04,649 INFO L158 Benchmark]: Witness Printer took 100.76ms. Allocated memory is still 272.6MB. Free memory was 203.7MB in the beginning and 192.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:24:04,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 90.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 366.45ms. Allocated memory is still 151.0MB. Free memory was 120.0MB in the beginning and 104.1MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 77.96ms. Allocated memory is still 151.0MB. Free memory was 104.1MB in the beginning and 101.3MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 77.11ms. Allocated memory is still 151.0MB. Free memory was 101.3MB in the beginning and 98.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 944.55ms. Allocated memory is still 151.0MB. Free memory was 98.6MB in the beginning and 81.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 23029.32ms. Allocated memory was 151.0MB in the beginning and 272.6MB in the end (delta: 121.6MB). Free memory was 80.0MB in the beginning and 203.7MB in the end (delta: -123.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 100.76ms. Allocated memory is still 272.6MB. Free memory was 203.7MB in the beginning and 192.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 390]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int q_buf_0 ; [L33] int q_free ; [L34] int q_read_ev ; [L35] int q_write_ev ; [L36] int p_num_write ; [L37] int p_last_write ; [L38] int p_dw_st ; [L39] int p_dw_pc ; [L40] int p_dw_i ; [L41] int c_num_read ; [L42] int c_last_read ; [L43] int c_dr_st ; [L44] int c_dr_pc ; [L45] int c_dr_i ; [L152] static int a_t ; [L394] int m_pc = 0; [L395] int t1_pc = 0; [L396] int m_st ; [L397] int t1_st ; [L398] int m_i ; [L399] int t1_i ; [L400] int M_E = 2; [L401] int T1_E = 2; [L402] int E_M = 2; [L403] int E_1 = 2; [L407] int token ; [L409] int local ; [L868] COND FALSE !(__VERIFIER_nondet_int()) [L871] CALL main2() [L855] int __retres1 ; [L859] CALL init_model2() [L770] m_i = 1 [L771] t1_i = 1 [L859] RET init_model2() [L860] CALL start_simulation2() [L796] int kernel_st ; [L797] int tmp ; [L798] int tmp___0 ; [L802] kernel_st = 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L803] FCALL update_channels2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L804] CALL init_threads2() [L552] COND TRUE m_i == 1 [L553] m_st = 0 [L557] COND TRUE t1_i == 1 [L558] t1_st = 0 [L804] RET init_threads2() [L805] CALL fire_delta_events2() VAL [\old(E_1)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L641] COND FALSE !(M_E == 0) [L646] COND FALSE !(T1_E == 0) [L651] COND FALSE !(E_M == 0) [L656] COND FALSE !(E_1 == 0) [L805] RET fire_delta_events2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L806] CALL activate_threads2() VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L694] int tmp ; [L695] int tmp___0 ; [L699] CALL, EXPR is_master_triggered() [L503] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L506] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L516] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L518] return (__retres1); [L699] RET, EXPR is_master_triggered() [L699] tmp = is_master_triggered() [L701] COND FALSE !(\read(tmp)) [L707] CALL, EXPR is_transmit1_triggered() [L522] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L525] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L535] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L537] return (__retres1); [L707] RET, EXPR is_transmit1_triggered() [L707] tmp___0 = is_transmit1_triggered() [L709] COND FALSE !(\read(tmp___0)) [L806] RET activate_threads2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L807] CALL reset_delta_events2() VAL [\old(E_1)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L669] COND FALSE !(M_E == 1) [L674] COND FALSE !(T1_E == 1) [L679] COND FALSE !(E_M == 1) [L684] COND FALSE !(E_1 == 1) [L807] RET reset_delta_events2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L810] COND TRUE 1 [L813] kernel_st = 1 [L814] CALL eval2() [L588] int tmp ; VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L592] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L595] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L567] int __retres1 ; [L570] COND TRUE m_st == 0 [L571] __retres1 = 1 [L583] return (__retres1); [L595] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L595] tmp = exists_runnable_thread2() [L597] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, tmp=1, token=0] [L602] COND TRUE m_st == 0 [L603] int tmp_ndt_1; [L604] tmp_ndt_1 = __VERIFIER_nondet_int() [L605] COND FALSE !(\read(tmp_ndt_1)) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, tmp=1, tmp_ndt_1=0, token=0] [L616] COND TRUE t1_st == 0 [L617] int tmp_ndt_2; [L618] tmp_ndt_2 = __VERIFIER_nondet_int() [L619] COND TRUE \read(tmp_ndt_2) [L621] t1_st = 1 [L622] CALL transmit1() [L470] COND TRUE t1_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, token=0] [L481] COND TRUE 1 [L483] t1_pc = 1 [L484] t1_st = 2 [L622] RET transmit1() [L592] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, token=0] [L595] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L567] int __retres1 ; [L570] COND TRUE m_st == 0 [L571] __retres1 = 1 [L583] return (__retres1); [L595] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, token=0] [L595] tmp = exists_runnable_thread2() [L597] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, token=0] [L602] COND TRUE m_st == 0 [L603] int tmp_ndt_1; [L604] tmp_ndt_1 = __VERIFIER_nondet_int() [L605] COND TRUE \read(tmp_ndt_1) [L607] m_st = 1 [L608] CALL master() [L412] int tmp_var = __VERIFIER_nondet_int(); [L414] COND TRUE m_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L425] COND TRUE 1 [L428] token = __VERIFIER_nondet_int() [L429] local = token [L430] E_1 = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L431] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L723] CALL activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L694] int tmp ; [L695] int tmp___0 ; [L699] CALL, EXPR is_master_triggered() [L503] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L506] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L516] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L518] return (__retres1); [L699] RET, EXPR is_master_triggered() [L699] tmp = is_master_triggered() [L701] COND FALSE !(\read(tmp)) [L707] CALL, EXPR is_transmit1_triggered() [L522] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L525] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L526] COND TRUE E_1 == 1 [L527] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L537] return (__retres1); [L707] RET, EXPR is_transmit1_triggered() [L707] tmp___0 = is_transmit1_triggered() [L709] COND TRUE \read(tmp___0) [L710] t1_st = 0 [L723] RET activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, token=0] [L431] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L432] E_1 = 2 [L433] m_pc = 1 [L434] m_st = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L608] RET master() [L616] COND TRUE t1_st == 0 [L617] int tmp_ndt_2; [L618] tmp_ndt_2 = __VERIFIER_nondet_int() [L619] COND TRUE \read(tmp_ndt_2) [L621] t1_st = 1 [L622] CALL transmit1() [L470] COND FALSE !(t1_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=0] [L473] COND TRUE t1_pc == 1 [L489] token += 1 [L490] E_M = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L491] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L723] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L694] int tmp ; [L695] int tmp___0 ; [L699] CALL, EXPR is_master_triggered() [L503] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L506] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L507] COND TRUE E_M == 1 [L508] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L518] return (__retres1); [L699] RET, EXPR is_master_triggered() [L699] tmp = is_master_triggered() [L701] COND TRUE \read(tmp) [L702] m_st = 0 [L707] CALL, EXPR is_transmit1_triggered() [L522] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L525] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L526] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L535] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L537] return (__retres1); [L707] RET, EXPR is_transmit1_triggered() [L707] tmp___0 = is_transmit1_triggered() [L709] COND FALSE !(\read(tmp___0)) [L723] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L491] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L492] E_M = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L481] COND TRUE 1 [L483] t1_pc = 1 [L484] t1_st = 2 [L622] RET transmit1() [L592] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=-1, tmp_ndt_2=1, token=1] [L595] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] [L567] int __retres1 ; [L570] COND TRUE m_st == 0 [L571] __retres1 = 1 [L583] return (__retres1); [L595] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=-1, tmp_ndt_2=1, token=1] [L595] tmp = exists_runnable_thread2() [L597] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp=1, tmp_ndt_1=-1, tmp_ndt_2=1, token=1] [L602] COND TRUE m_st == 0 [L603] int tmp_ndt_1; [L604] tmp_ndt_1 = __VERIFIER_nondet_int() [L605] COND TRUE \read(tmp_ndt_1) [L607] m_st = 1 [L608] CALL master() [L412] int tmp_var = __VERIFIER_nondet_int(); [L414] COND FALSE !(m_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L417] COND TRUE m_pc == 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L439] COND FALSE !(token != local + 1) [L444] COND TRUE tmp_var <= 5 [L445] COND TRUE tmp_var >= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L450] COND TRUE tmp_var <= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L451] COND TRUE tmp_var >= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L452] COND TRUE tmp_var == 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L453] CALL error2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] [L390] reach_error() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=0, q_read_ev=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 124 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 22.8s, OverallIterations: 19, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2292 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2279 mSDsluCounter, 4430 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1809 mSDsCounter, 263 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1291 IncrementalHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 263 mSolverCounterUnsat, 2621 mSDtfsCounter, 1291 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 506 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=782occurred in iteration=18, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 747 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 1577 NumberOfCodeBlocks, 1577 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1508 ConstructedInterpolants, 0 QuantifiedInterpolants, 2938 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1813 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 24 InterpolantComputations, 17 PerfectInterpolantSequences, 603/659 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-23 14:24:04,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f33b3ef1-f8d4-459e-a7f4-aadf22321901/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE