./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V --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 d7581eca761af2e68d92eb1cb64032fd3321be3eb54b53aabe807351a9f77b1d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:19:13,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:19:13,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:19:13,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:19:13,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:19:13,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:19:13,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:19:13,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:19:13,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:19:13,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:19:13,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:19:13,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:19:13,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:19:13,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:19:13,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:19:13,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:19:13,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:19:13,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:19:13,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:19:13,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:19:13,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:19:13,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:19:13,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:19:13,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:19:13,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:19:13,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:19:13,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:19:13,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:19:13,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:19:13,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:19:13,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:19:13,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:19:13,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:19:13,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:19:13,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:19:13,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:19:13,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:19:13,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:19:13,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:19:13,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:19:13,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:19:13,451 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:19:13,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:19:13,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:19:13,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:19:13,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:19:13,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:19:13,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:19:13,480 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:19:13,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:19:13,481 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:19:13,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:19:13,481 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:19:13,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:19:13,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:19:13,482 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:19:13,482 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:19:13,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:19:13,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:19:13,482 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:19:13,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:19:13,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:19:13,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:19:13,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:19:13,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:19:13,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:19:13,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:19:13,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:19:13,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:19:13,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:19:13,485 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:19:13,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:19:13,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:19:13,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:19:13,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:19:13,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:19:13,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:19:13,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:19:13,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:19:13,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:19:13,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:19:13,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:19:13,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:19:13,488 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7581eca761af2e68d92eb1cb64032fd3321be3eb54b53aabe807351a9f77b1d [2021-11-23 02:19:13,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:19:13,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:19:13,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:19:13,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:19:13,752 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:19:13,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2021-11-23 02:19:13,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/data/622758d95/f543cd4d314744f5a818e0789642124d/FLAG08d4589b8 [2021-11-23 02:19:14,276 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:19:14,276 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2021-11-23 02:19:14,294 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/data/622758d95/f543cd4d314744f5a818e0789642124d/FLAG08d4589b8 [2021-11-23 02:19:14,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/data/622758d95/f543cd4d314744f5a818e0789642124d [2021-11-23 02:19:14,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:19:14,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:19:14,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:19:14,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:19:14,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:19:14,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:19:14" (1/1) ... [2021-11-23 02:19:14,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e1442ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:14, skipping insertion in model container [2021-11-23 02:19:14,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:19:14" (1/1) ... [2021-11-23 02:19:14,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:19:14,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:19:14,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[914,927] [2021-11-23 02:19:14,961 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[7115,7128] [2021-11-23 02:19:14,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:19:15,003 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:19:15,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[914,927] [2021-11-23 02:19:15,038 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[7115,7128] [2021-11-23 02:19:15,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:19:15,105 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:19:15,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15 WrapperNode [2021-11-23 02:19:15,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:19:15,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:19:15,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:19:15,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:19:15,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,200 INFO L137 Inliner]: procedures = 55, calls = 61, calls flagged for inlining = 23, calls inlined = 23, statements flattened = 407 [2021-11-23 02:19:15,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:19:15,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:19:15,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:19:15,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:19:15,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:19:15,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:19:15,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:19:15,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:19:15,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (1/1) ... [2021-11-23 02:19:15,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:19:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:15,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:19:15,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:19:15,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:19:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:19:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:19:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-11-23 02:19:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-11-23 02:19:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-23 02:19:15,326 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-23 02:19:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-23 02:19:15,326 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-23 02:19:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-11-23 02:19:15,326 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-11-23 02:19:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-23 02:19:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-23 02:19:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-23 02:19:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-23 02:19:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-11-23 02:19:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-11-23 02:19:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-11-23 02:19:15,328 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-11-23 02:19:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-11-23 02:19:15,328 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-11-23 02:19:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-23 02:19:15,328 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-23 02:19:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:19:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-23 02:19:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-23 02:19:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-11-23 02:19:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-11-23 02:19:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:19:15,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:19:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-23 02:19:15,332 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-23 02:19:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-11-23 02:19:15,332 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-11-23 02:19:15,443 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:19:15,444 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:19:16,013 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:19:16,149 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:19:16,149 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-23 02:19:16,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:19:16 BoogieIcfgContainer [2021-11-23 02:19:16,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:19:16,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:19:16,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:19:16,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:19:16,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:19:14" (1/3) ... [2021-11-23 02:19:16,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2e4b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:19:16, skipping insertion in model container [2021-11-23 02:19:16,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:15" (2/3) ... [2021-11-23 02:19:16,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2e4b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:19:16, skipping insertion in model container [2021-11-23 02:19:16,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:19:16" (3/3) ... [2021-11-23 02:19:16,161 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2021-11-23 02:19:16,166 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:19:16,166 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:19:16,216 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:19:16,222 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:19:16,223 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:19:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 96 states have (on average 1.4895833333333333) internal successors, (143), 104 states have internal predecessors, (143), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-23 02:19:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:19:16,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:16,254 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:19:16,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -116487409, now seen corresponding path program 1 times [2021-11-23 02:19:16,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:16,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866660676] [2021-11-23 02:19:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:16,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:16,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:16,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866660676] [2021-11-23 02:19:16,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866660676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:16,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:16,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:19:16,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144385125] [2021-11-23 02:19:16,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:16,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:19:16,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:19:16,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:19:16,527 INFO L87 Difference]: Start difference. First operand has 145 states, 96 states have (on average 1.4895833333333333) internal successors, (143), 104 states have internal predecessors, (143), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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) [2021-11-23 02:19:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:17,102 INFO L93 Difference]: Finished difference Result 507 states and 738 transitions. [2021-11-23 02:19:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:19:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 [2021-11-23 02:19:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:17,143 INFO L225 Difference]: With dead ends: 507 [2021-11-23 02:19:17,143 INFO L226 Difference]: Without dead ends: 357 [2021-11-23 02:19:17,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:19:17,158 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 441 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:17,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 519 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:19:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-23 02:19:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 344. [2021-11-23 02:19:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 233 states have (on average 1.3433476394849786) internal successors, (313), 241 states have internal predecessors, (313), 72 states have call successors, (72), 39 states have call predecessors, (72), 37 states have return successors, (86), 65 states have call predecessors, (86), 68 states have call successors, (86) [2021-11-23 02:19:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 471 transitions. [2021-11-23 02:19:17,290 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 471 transitions. Word has length 35 [2021-11-23 02:19:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:17,291 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 471 transitions. [2021-11-23 02:19:17,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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) [2021-11-23 02:19:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 471 transitions. [2021-11-23 02:19:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:19:17,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:17,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:17,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:19:17,299 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2094405935, now seen corresponding path program 1 times [2021-11-23 02:19:17,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:17,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885366481] [2021-11-23 02:19:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:17,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:17,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885366481] [2021-11-23 02:19:17,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885366481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:17,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:17,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:19:17,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527979184] [2021-11-23 02:19:17,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:17,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:19:17,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:19:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:19:17,423 INFO L87 Difference]: Start difference. First operand 344 states and 471 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:19:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:18,134 INFO L93 Difference]: Finished difference Result 819 states and 1101 transitions. [2021-11-23 02:19:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:19:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-11-23 02:19:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:18,149 INFO L225 Difference]: With dead ends: 819 [2021-11-23 02:19:18,149 INFO L226 Difference]: Without dead ends: 755 [2021-11-23 02:19:18,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:19:18,157 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 699 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:18,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 769 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:19:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-23 02:19:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 684. [2021-11-23 02:19:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 470 states have (on average 1.3021276595744682) internal successors, (612), 478 states have internal predecessors, (612), 127 states have call successors, (127), 87 states have call predecessors, (127), 85 states have return successors, (156), 120 states have call predecessors, (156), 123 states have call successors, (156) [2021-11-23 02:19:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 895 transitions. [2021-11-23 02:19:18,260 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 895 transitions. Word has length 45 [2021-11-23 02:19:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:18,261 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 895 transitions. [2021-11-23 02:19:18,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:19:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 895 transitions. [2021-11-23 02:19:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:19:18,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:18,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:18,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:19:18,274 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1493825853, now seen corresponding path program 1 times [2021-11-23 02:19:18,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:18,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080343623] [2021-11-23 02:19:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:18,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:18,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:18,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080343623] [2021-11-23 02:19:18,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080343623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:18,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:18,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:19:18,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126545424] [2021-11-23 02:19:18,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:18,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:19:18,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:19:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:19:18,402 INFO L87 Difference]: Start difference. First operand 684 states and 895 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:19:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:18,916 INFO L93 Difference]: Finished difference Result 1445 states and 1842 transitions. [2021-11-23 02:19:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:19:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-11-23 02:19:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:18,926 INFO L225 Difference]: With dead ends: 1445 [2021-11-23 02:19:18,926 INFO L226 Difference]: Without dead ends: 1042 [2021-11-23 02:19:18,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:19:18,929 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 292 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:18,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 554 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:19:18,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-11-23 02:19:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1013. [2021-11-23 02:19:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 693 states have (on average 1.274170274170274) internal successors, (883), 702 states have internal predecessors, (883), 183 states have call successors, (183), 135 states have call predecessors, (183), 135 states have return successors, (230), 177 states have call predecessors, (230), 179 states have call successors, (230) [2021-11-23 02:19:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1296 transitions. [2021-11-23 02:19:19,041 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1296 transitions. Word has length 46 [2021-11-23 02:19:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:19,042 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1296 transitions. [2021-11-23 02:19:19,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:19:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1296 transitions. [2021-11-23 02:19:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:19:19,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:19,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:19,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:19:19,045 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1619350280, now seen corresponding path program 1 times [2021-11-23 02:19:19,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:19,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598151898] [2021-11-23 02:19:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:19,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:19,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:19,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598151898] [2021-11-23 02:19:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598151898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:19,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:19,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:19,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535049472] [2021-11-23 02:19:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:19,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:19,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:19,136 INFO L87 Difference]: Start difference. First operand 1013 states and 1296 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:19:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:19,268 INFO L93 Difference]: Finished difference Result 1954 states and 2455 transitions. [2021-11-23 02:19:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:19,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-11-23 02:19:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:19,278 INFO L225 Difference]: With dead ends: 1954 [2021-11-23 02:19:19,278 INFO L226 Difference]: Without dead ends: 1272 [2021-11-23 02:19:19,281 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:19,282 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 68 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:19,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 307 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:19:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-11-23 02:19:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1250. [2021-11-23 02:19:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 854 states have (on average 1.2611241217798594) internal successors, (1077), 863 states have internal predecessors, (1077), 225 states have call successors, (225), 173 states have call predecessors, (225), 169 states have return successors, (276), 215 states have call predecessors, (276), 221 states have call successors, (276) [2021-11-23 02:19:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1578 transitions. [2021-11-23 02:19:19,412 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1578 transitions. Word has length 47 [2021-11-23 02:19:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:19,413 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1578 transitions. [2021-11-23 02:19:19,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:19:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1578 transitions. [2021-11-23 02:19:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:19:19,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:19,415 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:19,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:19:19,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash -499984110, now seen corresponding path program 1 times [2021-11-23 02:19:19,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:19,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221015152] [2021-11-23 02:19:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:19,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:19:19,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221015152] [2021-11-23 02:19:19,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221015152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:19,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:19,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:19,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710094488] [2021-11-23 02:19:19,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:19,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:19,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:19,470 INFO L87 Difference]: Start difference. First operand 1250 states and 1578 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:19:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:19,582 INFO L93 Difference]: Finished difference Result 1656 states and 2068 transitions. [2021-11-23 02:19:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:19,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-11-23 02:19:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:19,591 INFO L225 Difference]: With dead ends: 1656 [2021-11-23 02:19:19,591 INFO L226 Difference]: Without dead ends: 1101 [2021-11-23 02:19:19,593 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:19,594 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 157 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:19,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 231 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:19:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-11-23 02:19:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 895. [2021-11-23 02:19:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 618 states have (on average 1.2524271844660195) internal successors, (774), 626 states have internal predecessors, (774), 162 states have call successors, (162), 119 states have call predecessors, (162), 113 states have return successors, (184), 151 states have call predecessors, (184), 158 states have call successors, (184) [2021-11-23 02:19:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1120 transitions. [2021-11-23 02:19:19,681 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1120 transitions. Word has length 53 [2021-11-23 02:19:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:19,682 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1120 transitions. [2021-11-23 02:19:19,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:19:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1120 transitions. [2021-11-23 02:19:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:19:19,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:19,684 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:19,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:19:19,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash -954323103, now seen corresponding path program 1 times [2021-11-23 02:19:19,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:19,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814705749] [2021-11-23 02:19:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:19,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:19,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:19,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814705749] [2021-11-23 02:19:19,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814705749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:19,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:19,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:19:19,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502263278] [2021-11-23 02:19:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:19,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:19:19,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:19:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:19:19,736 INFO L87 Difference]: Start difference. First operand 895 states and 1120 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:19:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:19,942 INFO L93 Difference]: Finished difference Result 1150 states and 1421 transitions. [2021-11-23 02:19:19,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:19:19,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-11-23 02:19:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:19,952 INFO L225 Difference]: With dead ends: 1150 [2021-11-23 02:19:19,952 INFO L226 Difference]: Without dead ends: 1147 [2021-11-23 02:19:19,953 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:19,957 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 293 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:19,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 210 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:19:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-23 02:19:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 894. [2021-11-23 02:19:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 618 states have (on average 1.2427184466019416) internal successors, (768), 625 states have internal predecessors, (768), 161 states have call successors, (161), 119 states have call predecessors, (161), 113 states have return successors, (184), 151 states have call predecessors, (184), 158 states have call successors, (184) [2021-11-23 02:19:20,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1113 transitions. [2021-11-23 02:19:20,057 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1113 transitions. Word has length 54 [2021-11-23 02:19:20,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:20,057 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1113 transitions. [2021-11-23 02:19:20,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:19:20,058 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1113 transitions. [2021-11-23 02:19:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:19:20,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:20,060 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:20,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:19:20,060 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:20,061 INFO L85 PathProgramCache]: Analyzing trace with hash 480100465, now seen corresponding path program 1 times [2021-11-23 02:19:20,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:20,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692014751] [2021-11-23 02:19:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:20,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:20,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:20,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692014751] [2021-11-23 02:19:20,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692014751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:19:20,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039824490] [2021-11-23 02:19:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:20,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:20,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:20,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:19:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:19:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:20,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:19:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:21,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039824490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:19:21,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419495622] [2021-11-23 02:19:21,148 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:19:21,148 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:19:21,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:19:21,159 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:19:21,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:19:22,938 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 95 for LOIs [2021-11-23 02:19:22,960 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 91 for LOIs [2021-11-23 02:19:22,979 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 99 for LOIs [2021-11-23 02:19:23,336 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 95 for LOIs [2021-11-23 02:19:23,390 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 95 for LOIs [2021-11-23 02:19:23,433 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 95 for LOIs [2021-11-23 02:19:23,451 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 102 for LOIs [2021-11-23 02:19:23,471 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:19:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1419495622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:30,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:19:30,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2021-11-23 02:19:30,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852128] [2021-11-23 02:19:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:30,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:19:30,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:19:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 02:19:30,962 INFO L87 Difference]: Start difference. First operand 894 states and 1113 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:19:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:41,730 INFO L93 Difference]: Finished difference Result 1555 states and 1887 transitions. [2021-11-23 02:19:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 02:19:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2021-11-23 02:19:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:41,738 INFO L225 Difference]: With dead ends: 1555 [2021-11-23 02:19:41,739 INFO L226 Difference]: Without dead ends: 942 [2021-11-23 02:19:41,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 02:19:41,743 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 160 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:41,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1781 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2858 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:19:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-23 02:19:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 927. [2021-11-23 02:19:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 643 states have (on average 1.234836702954899) internal successors, (794), 650 states have internal predecessors, (794), 163 states have call successors, (163), 125 states have call predecessors, (163), 119 states have return successors, (186), 153 states have call predecessors, (186), 160 states have call successors, (186) [2021-11-23 02:19:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1143 transitions. [2021-11-23 02:19:41,822 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1143 transitions. Word has length 55 [2021-11-23 02:19:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:41,824 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 1143 transitions. [2021-11-23 02:19:41,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:19:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1143 transitions. [2021-11-23 02:19:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:19:41,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:41,827 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:19:41,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:42,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:42,056 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1834873832, now seen corresponding path program 1 times [2021-11-23 02:19:42,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:42,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272942869] [2021-11-23 02:19:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:42,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:19:42,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:42,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272942869] [2021-11-23 02:19:42,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272942869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:42,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:42,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:19:42,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739731538] [2021-11-23 02:19:42,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:42,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:19:42,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:42,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:19:42,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:19:42,170 INFO L87 Difference]: Start difference. First operand 927 states and 1143 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) [2021-11-23 02:19:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:42,567 INFO L93 Difference]: Finished difference Result 1359 states and 1757 transitions. [2021-11-23 02:19:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:19:42,568 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 [2021-11-23 02:19:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:42,575 INFO L225 Difference]: With dead ends: 1359 [2021-11-23 02:19:42,576 INFO L226 Difference]: Without dead ends: 1090 [2021-11-23 02:19:42,577 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:42,578 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 266 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:42,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 369 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:19:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-23 02:19:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1074. [2021-11-23 02:19:42,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 742 states have (on average 1.2371967654986522) internal successors, (918), 751 states have internal predecessors, (918), 193 states have call successors, (193), 143 states have call predecessors, (193), 137 states have return successors, (228), 181 states have call predecessors, (228), 190 states have call successors, (228) [2021-11-23 02:19:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1339 transitions. [2021-11-23 02:19:42,674 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1339 transitions. Word has length 60 [2021-11-23 02:19:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:42,674 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1339 transitions. [2021-11-23 02:19:42,675 INFO L471 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) [2021-11-23 02:19:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1339 transitions. [2021-11-23 02:19:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:19:42,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:42,678 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:19:42,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:19:42,679 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:42,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1254951842, now seen corresponding path program 1 times [2021-11-23 02:19:42,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:42,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605902192] [2021-11-23 02:19:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:42,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:19:42,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:42,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605902192] [2021-11-23 02:19:42,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605902192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:42,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:42,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:42,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943334082] [2021-11-23 02:19:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:42,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:42,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:42,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:42,714 INFO L87 Difference]: Start difference. First operand 1074 states and 1339 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) [2021-11-23 02:19:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:42,835 INFO L93 Difference]: Finished difference Result 1526 states and 1965 transitions. [2021-11-23 02:19:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:42,836 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 [2021-11-23 02:19:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:42,844 INFO L225 Difference]: With dead ends: 1526 [2021-11-23 02:19:42,844 INFO L226 Difference]: Without dead ends: 1161 [2021-11-23 02:19:42,846 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:42,847 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 28 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:42,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 337 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:19:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-11-23 02:19:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1105. [2021-11-23 02:19:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 767 states have (on average 1.242503259452412) internal successors, (953), 776 states have internal predecessors, (953), 196 states have call successors, (196), 146 states have call predecessors, (196), 140 states have return successors, (231), 184 states have call predecessors, (231), 193 states have call successors, (231) [2021-11-23 02:19:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1380 transitions. [2021-11-23 02:19:42,947 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1380 transitions. Word has length 61 [2021-11-23 02:19:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:42,948 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1380 transitions. [2021-11-23 02:19:42,948 INFO L471 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) [2021-11-23 02:19:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1380 transitions. [2021-11-23 02:19:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:19:42,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:42,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:42,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:19:42,951 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1585595164, now seen corresponding path program 1 times [2021-11-23 02:19:42,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:42,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452476307] [2021-11-23 02:19:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:42,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:19:42,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:42,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452476307] [2021-11-23 02:19:42,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452476307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:42,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:42,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:42,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541683549] [2021-11-23 02:19:42,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:42,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:42,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:42,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:42,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:42,985 INFO L87 Difference]: Start difference. First operand 1105 states and 1380 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:19:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:43,134 INFO L93 Difference]: Finished difference Result 1687 states and 2063 transitions. [2021-11-23 02:19:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:43,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-23 02:19:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:43,145 INFO L225 Difference]: With dead ends: 1687 [2021-11-23 02:19:43,145 INFO L226 Difference]: Without dead ends: 1314 [2021-11-23 02:19:43,147 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:43,148 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 43 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:43,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 344 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:19:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-11-23 02:19:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1226. [2021-11-23 02:19:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 848 states have (on average 1.2334905660377358) internal successors, (1046), 861 states have internal predecessors, (1046), 218 states have call successors, (218), 168 states have call predecessors, (218), 158 states have return successors, (253), 198 states have call predecessors, (253), 215 states have call successors, (253) [2021-11-23 02:19:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1517 transitions. [2021-11-23 02:19:43,260 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1517 transitions. Word has length 61 [2021-11-23 02:19:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:43,261 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1517 transitions. [2021-11-23 02:19:43,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:19:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1517 transitions. [2021-11-23 02:19:43,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:19:43,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:43,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:43,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:19:43,264 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2067861852, now seen corresponding path program 1 times [2021-11-23 02:19:43,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352075736] [2021-11-23 02:19:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:43,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:19:43,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:43,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352075736] [2021-11-23 02:19:43,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352075736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:43,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:43,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:19:43,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015629702] [2021-11-23 02:19:43,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:43,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:19:43,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:19:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:19:43,343 INFO L87 Difference]: Start difference. First operand 1226 states and 1517 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:19:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:43,891 INFO L93 Difference]: Finished difference Result 2223 states and 2677 transitions. [2021-11-23 02:19:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:19:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2021-11-23 02:19:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:43,902 INFO L225 Difference]: With dead ends: 2223 [2021-11-23 02:19:43,902 INFO L226 Difference]: Without dead ends: 1537 [2021-11-23 02:19:43,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:19:43,905 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 272 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:43,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 592 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:19:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-11-23 02:19:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1406. [2021-11-23 02:19:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 968 states have (on average 1.2138429752066116) internal successors, (1175), 981 states have internal predecessors, (1175), 250 states have call successors, (250), 196 states have call predecessors, (250), 186 states have return successors, (285), 230 states have call predecessors, (285), 247 states have call successors, (285) [2021-11-23 02:19:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 1710 transitions. [2021-11-23 02:19:44,035 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 1710 transitions. Word has length 63 [2021-11-23 02:19:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:44,036 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 1710 transitions. [2021-11-23 02:19:44,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:19:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 1710 transitions. [2021-11-23 02:19:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 02:19:44,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:44,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:44,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:19:44,039 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash 263376156, now seen corresponding path program 1 times [2021-11-23 02:19:44,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:44,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629709681] [2021-11-23 02:19:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:44,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:19:44,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:44,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629709681] [2021-11-23 02:19:44,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629709681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:19:44,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249879130] [2021-11-23 02:19:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:44,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:44,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:44,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:44,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:19:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:44,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:19:44,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:19:44,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:19:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:19:44,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249879130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:19:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290936886] [2021-11-23 02:19:44,755 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:19:44,755 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:19:44,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:19:44,757 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:19:44,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:19:47,985 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 95 for LOIs [2021-11-23 02:19:48,003 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 61 for LOIs [2021-11-23 02:19:48,015 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 97 for LOIs [2021-11-23 02:19:48,046 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 99 for LOIs [2021-11-23 02:19:48,294 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 95 for LOIs [2021-11-23 02:19:48,328 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 95 for LOIs [2021-11-23 02:19:48,377 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 95 for LOIs [2021-11-23 02:19:48,395 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 102 for LOIs [2021-11-23 02:19:48,428 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:19:56,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40698#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~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) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (= ~token~0 0) (= ~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) (= ~E_M~0 2) (= ~a_t~0 0) (= ~E_1~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:19:56,012 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:19:56,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:19:56,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2021-11-23 02:19:56,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350056525] [2021-11-23 02:19:56,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:19:56,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:19:56,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:19:56,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:19:56,015 INFO L87 Difference]: Start difference. First operand 1406 states and 1710 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-23 02:19:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:56,744 INFO L93 Difference]: Finished difference Result 3613 states and 4239 transitions. [2021-11-23 02:19:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:19:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2021-11-23 02:19:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:56,770 INFO L225 Difference]: With dead ends: 3613 [2021-11-23 02:19:56,770 INFO L226 Difference]: Without dead ends: 3610 [2021-11-23 02:19:56,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:19:56,774 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 450 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:56,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 692 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:19:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-11-23 02:19:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2721. [2021-11-23 02:19:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 1860 states have (on average 1.1919354838709677) internal successors, (2217), 1881 states have internal predecessors, (2217), 477 states have call successors, (477), 400 states have call predecessors, (477), 382 states have return successors, (524), 441 states have call predecessors, (524), 474 states have call successors, (524) [2021-11-23 02:19:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3218 transitions. [2021-11-23 02:19:57,064 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3218 transitions. Word has length 64 [2021-11-23 02:19:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:57,064 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 3218 transitions. [2021-11-23 02:19:57,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-23 02:19:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3218 transitions. [2021-11-23 02:19:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:19:57,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:57,068 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:57,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:57,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:57,284 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 783056300, now seen corresponding path program 2 times [2021-11-23 02:19:57,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:57,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824232989] [2021-11-23 02:19:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:57,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:19:57,313 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:57,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824232989] [2021-11-23 02:19:57,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824232989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:57,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:57,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:57,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849605899] [2021-11-23 02:19:57,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:57,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:57,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:57,316 INFO L87 Difference]: Start difference. First operand 2721 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:19:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:57,602 INFO L93 Difference]: Finished difference Result 3917 states and 4590 transitions. [2021-11-23 02:19:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2021-11-23 02:19:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:57,617 INFO L225 Difference]: With dead ends: 3917 [2021-11-23 02:19:57,618 INFO L226 Difference]: Without dead ends: 1979 [2021-11-23 02:19:57,624 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:57,625 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 162 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:57,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 269 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:19:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-11-23 02:19:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1963. [2021-11-23 02:19:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1354 states have (on average 1.1890694239290989) internal successors, (1610), 1367 states have internal predecessors, (1610), 341 states have call successors, (341), 276 states have call predecessors, (341), 266 states have return successors, (380), 321 states have call predecessors, (380), 338 states have call successors, (380) [2021-11-23 02:19:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 2331 transitions. [2021-11-23 02:19:57,847 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 2331 transitions. Word has length 67 [2021-11-23 02:19:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:57,848 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 2331 transitions. [2021-11-23 02:19:57,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:19:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 2331 transitions. [2021-11-23 02:19:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:19:57,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:57,851 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:57,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:19:57,852 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash -563929282, now seen corresponding path program 1 times [2021-11-23 02:19:57,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:57,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659536625] [2021-11-23 02:19:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:57,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:19:57,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659536625] [2021-11-23 02:19:57,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659536625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:57,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:57,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:57,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728528905] [2021-11-23 02:19:57,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:57,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:57,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:57,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:57,894 INFO L87 Difference]: Start difference. First operand 1963 states and 2331 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:19:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:58,204 INFO L93 Difference]: Finished difference Result 3560 states and 4159 transitions. [2021-11-23 02:19:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:58,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-23 02:19:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:58,224 INFO L225 Difference]: With dead ends: 3560 [2021-11-23 02:19:58,225 INFO L226 Difference]: Without dead ends: 2181 [2021-11-23 02:19:58,230 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:58,231 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 38 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:58,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 337 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:19:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-23 02:19:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2100. [2021-11-23 02:19:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 1451 states have (on average 1.1867677463818056) internal successors, (1722), 1470 states have internal predecessors, (1722), 362 states have call successors, (362), 297 states have call predecessors, (362), 285 states have return successors, (407), 334 states have call predecessors, (407), 359 states have call successors, (407) [2021-11-23 02:19:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 2491 transitions. [2021-11-23 02:19:58,502 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 2491 transitions. Word has length 71 [2021-11-23 02:19:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:58,503 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 2491 transitions. [2021-11-23 02:19:58,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:19:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 2491 transitions. [2021-11-23 02:19:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:19:58,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:58,508 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:19:58,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:19:58,508 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:58,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1311093219, now seen corresponding path program 1 times [2021-11-23 02:19:58,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:58,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505098801] [2021-11-23 02:19:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:58,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:19:58,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505098801] [2021-11-23 02:19:58,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505098801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:19:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492388783] [2021-11-23 02:19:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:58,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:58,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:58,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:58,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:19:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:19:58,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:19:58,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:19:58,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492388783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:58,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:19:58,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:19:58,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839373372] [2021-11-23 02:19:58,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:58,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:58,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:19:58,864 INFO L87 Difference]: Start difference. First operand 2100 states and 2491 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) [2021-11-23 02:19:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:59,109 INFO L93 Difference]: Finished difference Result 2510 states and 3056 transitions. [2021-11-23 02:19:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:59,109 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 [2021-11-23 02:19:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:59,127 INFO L225 Difference]: With dead ends: 2510 [2021-11-23 02:19:59,127 INFO L226 Difference]: Without dead ends: 2179 [2021-11-23 02:19:59,130 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:19:59,131 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 163 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:59,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 173 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:19:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2021-11-23 02:19:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 2164. [2021-11-23 02:19:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 1506 states have (on average 1.1872509960159363) internal successors, (1788), 1524 states have internal predecessors, (1788), 362 states have call successors, (362), 305 states have call predecessors, (362), 294 states have return successors, (405), 336 states have call predecessors, (405), 359 states have call successors, (405) [2021-11-23 02:19:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 2555 transitions. [2021-11-23 02:19:59,442 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 2555 transitions. Word has length 88 [2021-11-23 02:19:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:59,443 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 2555 transitions. [2021-11-23 02:19:59,444 INFO L471 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) [2021-11-23 02:19:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 2555 transitions. [2021-11-23 02:19:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:19:59,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:59,450 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:19:59,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:59,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:19:59,673 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:59,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2010385118, now seen corresponding path program 2 times [2021-11-23 02:19:59,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:59,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912413166] [2021-11-23 02:19:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:59,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:19:59,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:59,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912413166] [2021-11-23 02:19:59,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912413166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:19:59,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028114980] [2021-11-23 02:19:59,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:19:59,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:59,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:59,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:59,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:19:59,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:19:59,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:19:59,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:19:59,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:20:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:20:00,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:20:00,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028114980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:00,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:20:00,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:20:00,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403390730] [2021-11-23 02:20:00,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:00,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:20:00,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:00,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:20:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:20:00,057 INFO L87 Difference]: Start difference. First operand 2164 states and 2555 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-23 02:20:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:00,306 INFO L93 Difference]: Finished difference Result 2654 states and 3242 transitions. [2021-11-23 02:20:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:20:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 88 [2021-11-23 02:20:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:00,323 INFO L225 Difference]: With dead ends: 2654 [2021-11-23 02:20:00,323 INFO L226 Difference]: Without dead ends: 2276 [2021-11-23 02:20:00,326 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:20:00,327 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 66 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:00,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 345 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:20:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-11-23 02:20:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2254. [2021-11-23 02:20:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 1574 states have (on average 1.187420584498094) internal successors, (1869), 1593 states have internal predecessors, (1869), 375 states have call successors, (375), 315 states have call predecessors, (375), 303 states have return successors, (428), 347 states have call predecessors, (428), 372 states have call successors, (428) [2021-11-23 02:20:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2672 transitions. [2021-11-23 02:20:00,603 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2672 transitions. Word has length 88 [2021-11-23 02:20:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:00,604 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 2672 transitions. [2021-11-23 02:20:00,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-23 02:20:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2672 transitions. [2021-11-23 02:20:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:20:00,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:00,609 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:20:00,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:20:00,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:20:00,824 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:20:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1519561268, now seen corresponding path program 1 times [2021-11-23 02:20:00,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:00,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623019180] [2021-11-23 02:20:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:00,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:20:00,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:00,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623019180] [2021-11-23 02:20:00,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623019180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:20:00,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473030734] [2021-11-23 02:20:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:00,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:00,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:20:00,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:20:00,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:20:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:01,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:20:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:20:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:20:01,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:20:01,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473030734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:01,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:20:01,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:20:01,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326505182] [2021-11-23 02:20:01,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:01,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:20:01,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:01,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:20:01,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:20:01,137 INFO L87 Difference]: Start difference. First operand 2254 states and 2672 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) [2021-11-23 02:20:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:01,400 INFO L93 Difference]: Finished difference Result 3073 states and 3744 transitions. [2021-11-23 02:20:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:20:01,400 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 [2021-11-23 02:20:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:01,419 INFO L225 Difference]: With dead ends: 3073 [2021-11-23 02:20:01,419 INFO L226 Difference]: Without dead ends: 2472 [2021-11-23 02:20:01,423 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:20:01,424 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 41 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:01,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 310 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:20:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-11-23 02:20:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2311. [2021-11-23 02:20:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1617 states have (on average 1.1904761904761905) internal successors, (1925), 1637 states have internal predecessors, (1925), 382 states have call successors, (382), 322 states have call predecessors, (382), 310 states have return successors, (435), 353 states have call predecessors, (435), 379 states have call successors, (435) [2021-11-23 02:20:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 2742 transitions. [2021-11-23 02:20:01,700 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 2742 transitions. Word has length 89 [2021-11-23 02:20:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:01,700 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 2742 transitions. [2021-11-23 02:20:01,701 INFO L471 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) [2021-11-23 02:20:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 2742 transitions. [2021-11-23 02:20:01,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:20:01,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:01,705 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:20:01,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:20:01,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:01,922 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:20:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1326912553, now seen corresponding path program 1 times [2021-11-23 02:20:01,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:01,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639571176] [2021-11-23 02:20:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:01,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:20:01,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:01,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639571176] [2021-11-23 02:20:01,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639571176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:20:01,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303737739] [2021-11-23 02:20:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:01,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:01,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:20:01,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:20:02,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:20:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:02,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:20:02,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:20:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:20:02,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:20:02,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303737739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:02,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:20:02,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:20:02,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843543590] [2021-11-23 02:20:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:02,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:20:02,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:20:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:20:02,197 INFO L87 Difference]: Start difference. First operand 2311 states and 2742 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) [2021-11-23 02:20:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:02,394 INFO L93 Difference]: Finished difference Result 2711 states and 3252 transitions. [2021-11-23 02:20:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:20:02,394 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 [2021-11-23 02:20:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:02,411 INFO L225 Difference]: With dead ends: 2711 [2021-11-23 02:20:02,411 INFO L226 Difference]: Without dead ends: 2415 [2021-11-23 02:20:02,414 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:20:02,415 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 43 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:02,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 342 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:20:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-11-23 02:20:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2345. [2021-11-23 02:20:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 1643 states have (on average 1.1923311016433353) internal successors, (1959), 1663 states have internal predecessors, (1959), 386 states have call successors, (386), 326 states have call predecessors, (386), 314 states have return successors, (439), 357 states have call predecessors, (439), 383 states have call successors, (439) [2021-11-23 02:20:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 2784 transitions. [2021-11-23 02:20:02,724 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 2784 transitions. Word has length 89 [2021-11-23 02:20:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:02,725 INFO L470 AbstractCegarLoop]: Abstraction has 2345 states and 2784 transitions. [2021-11-23 02:20:02,725 INFO L471 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) [2021-11-23 02:20:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 2784 transitions. [2021-11-23 02:20:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 02:20:02,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:02,730 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:20:02,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:20:02,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:20:02,944 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:20:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash -320006360, now seen corresponding path program 1 times [2021-11-23 02:20:02,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:02,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007810824] [2021-11-23 02:20:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:02,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:20:03,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:03,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007810824] [2021-11-23 02:20:03,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007810824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:03,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:20:03,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:20:03,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835245958] [2021-11-23 02:20:03,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:03,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:20:03,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:20:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:20:03,070 INFO L87 Difference]: Start difference. First operand 2345 states and 2784 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) [2021-11-23 02:20:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:03,515 INFO L93 Difference]: Finished difference Result 3327 states and 4027 transitions. [2021-11-23 02:20:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:20:03,516 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 [2021-11-23 02:20:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:03,554 INFO L225 Difference]: With dead ends: 3327 [2021-11-23 02:20:03,554 INFO L226 Difference]: Without dead ends: 2826 [2021-11-23 02:20:03,558 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:20:03,559 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 227 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:03,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 372 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:20:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-11-23 02:20:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2785. [2021-11-23 02:20:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 1953 states have (on average 1.1976446492575525) internal successors, (2339), 1970 states have internal predecessors, (2339), 464 states have call successors, (464), 378 states have call predecessors, (464), 366 states have return successors, (515), 438 states have call predecessors, (515), 461 states have call successors, (515) [2021-11-23 02:20:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 3318 transitions. [2021-11-23 02:20:03,891 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 3318 transitions. Word has length 90 [2021-11-23 02:20:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:03,892 INFO L470 AbstractCegarLoop]: Abstraction has 2785 states and 3318 transitions. [2021-11-23 02:20:03,892 INFO L471 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) [2021-11-23 02:20:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 3318 transitions. [2021-11-23 02:20:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 02:20:03,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:03,898 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:20:03,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:20:03,898 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:20:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash 482877009, now seen corresponding path program 1 times [2021-11-23 02:20:03,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:03,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345617066] [2021-11-23 02:20:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:03,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:20:03,930 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:20:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:20:04,029 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:20:04,030 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:20:04,031 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 02:20:04,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 02:20:04,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:20:04,039 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:04,043 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:20:04,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:20:04 BoogieIcfgContainer [2021-11-23 02:20:04,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:20:04,223 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:20:04,223 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:20:04,223 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:20:04,224 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:19:16" (3/4) ... [2021-11-23 02:20:04,226 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 02:20:04,364 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:20:04,364 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:20:04,365 INFO L158 Benchmark]: Toolchain (without parser) took 49708.70ms. Allocated memory was 83.9MB in the beginning and 545.3MB in the end (delta: 461.4MB). Free memory was 45.1MB in the beginning and 421.0MB in the end (delta: -375.9MB). Peak memory consumption was 84.1MB. Max. memory is 16.1GB. [2021-11-23 02:20:04,365 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:20:04,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 448.90ms. Allocated memory is still 83.9MB. Free memory was 45.0MB in the beginning and 55.8MB in the end (delta: -10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:20:04,370 INFO L158 Benchmark]: Boogie Procedure Inliner took 93.43ms. Allocated memory is still 83.9MB. Free memory was 55.6MB in the beginning and 52.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:20:04,371 INFO L158 Benchmark]: Boogie Preprocessor took 38.95ms. Allocated memory is still 83.9MB. Free memory was 52.8MB in the beginning and 50.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:20:04,372 INFO L158 Benchmark]: RCFGBuilder took 910.98ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 50.5MB in the beginning and 58.2MB in the end (delta: -7.7MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2021-11-23 02:20:04,373 INFO L158 Benchmark]: TraceAbstraction took 48068.31ms. Allocated memory was 100.7MB in the beginning and 545.3MB in the end (delta: 444.6MB). Free memory was 57.8MB in the beginning and 436.7MB in the end (delta: -379.0MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. [2021-11-23 02:20:04,380 INFO L158 Benchmark]: Witness Printer took 141.38ms. Allocated memory is still 545.3MB. Free memory was 436.7MB in the beginning and 421.0MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 02:20:04,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 448.90ms. Allocated memory is still 83.9MB. Free memory was 45.0MB in the beginning and 55.8MB in the end (delta: -10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 93.43ms. Allocated memory is still 83.9MB. Free memory was 55.6MB in the beginning and 52.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.95ms. Allocated memory is still 83.9MB. Free memory was 52.8MB in the beginning and 50.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 910.98ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 50.5MB in the beginning and 58.2MB in the end (delta: -7.7MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. * TraceAbstraction took 48068.31ms. Allocated memory was 100.7MB in the beginning and 545.3MB in the end (delta: 444.6MB). Free memory was 57.8MB in the beginning and 436.7MB in the end (delta: -379.0MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. * Witness Printer took 141.38ms. Allocated memory is still 545.3MB. Free memory was 436.7MB in the beginning and 421.0MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. 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: 496]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L33] int q_buf_0 ; [L34] int q_free ; [L35] int q_read_ev ; [L36] int q_write_ev ; [L37] int q_req_up ; [L38] int q_ev ; [L59] int p_num_write ; [L60] int p_last_write ; [L61] int p_dw_st ; [L62] int p_dw_pc ; [L63] int p_dw_i ; [L64] int c_num_read ; [L65] int c_last_read ; [L66] int c_dr_st ; [L67] int c_dr_pc ; [L68] int c_dr_i ; [L172] static int a_t ; [L500] int m_pc = 0; [L501] int t1_pc = 0; [L502] int m_st ; [L503] int t1_st ; [L504] int m_i ; [L505] int t1_i ; [L506] int M_E = 2; [L507] int T1_E = 2; [L508] int E_M = 2; [L509] int E_1 = 2; [L513] int token ; [L515] int local ; [L974] COND FALSE !(__VERIFIER_nondet_int()) [L977] CALL main2() [L961] int __retres1 ; [L965] CALL init_model2() [L876] m_i = 1 [L877] t1_i = 1 [L965] RET init_model2() [L966] CALL start_simulation2() [L902] int kernel_st ; [L903] int tmp ; [L904] int tmp___0 ; [L908] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L909] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L910] CALL init_threads2() [L658] COND TRUE m_i == 1 [L659] m_st = 0 [L663] COND TRUE t1_i == 1 [L664] t1_st = 0 [L910] RET init_threads2() [L911] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L747] COND FALSE !(M_E == 0) [L752] COND FALSE !(T1_E == 0) [L757] COND FALSE !(E_M == 0) [L762] COND FALSE !(E_1 == 0) [L911] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L912] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L612] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L622] __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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L628] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L631] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L641] __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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L912] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L913] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L775] COND FALSE !(M_E == 1) [L780] COND FALSE !(T1_E == 1) [L785] COND FALSE !(E_M == 1) [L790] COND FALSE !(E_1 == 1) [L913] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L916] COND TRUE 1 [L919] kernel_st = 1 [L920] CALL eval2() [L694] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L698] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L701] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, token=0] [L701] tmp = exists_runnable_thread2() [L703] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, tmp=1, token=0] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] tmp_ndt_1 = __VERIFIER_nondet_int() [L711] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=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] [L722] COND TRUE t1_st == 0 [L723] int tmp_ndt_2; [L724] tmp_ndt_2 = __VERIFIER_nondet_int() [L725] COND TRUE \read(tmp_ndt_2) [L727] t1_st = 1 [L728] CALL transmit1() [L576] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, token=0] [L587] COND TRUE 1 [L589] t1_pc = 1 [L590] t1_st = 2 [L728] RET transmit1() [L698] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=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] [L701] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=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] [L701] tmp = exists_runnable_thread2() [L703] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=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] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] tmp_ndt_1 = __VERIFIER_nondet_int() [L711] COND TRUE \read(tmp_ndt_1) [L713] m_st = 1 [L714] CALL master() [L518] int tmp_var = __VERIFIER_nondet_int(); [L520] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L531] COND TRUE 1 [L534] token = __VERIFIER_nondet_int() [L535] local = token [L536] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=0, token=0] [L537] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L829] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L612] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L622] __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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L628] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L631] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L632] COND TRUE E_1 == 1 [L633] __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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=0] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND TRUE \read(tmp___0) [L816] t1_st = 0 [L829] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, token=0] [L537] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L538] E_1 = 2 [L539] m_pc = 1 [L540] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, tmp_var=0, token=0] [L714] RET master() [L722] COND TRUE t1_st == 0 [L723] int tmp_ndt_2; [L724] tmp_ndt_2 = __VERIFIER_nondet_int() [L725] COND TRUE \read(tmp_ndt_2) [L727] t1_st = 1 [L728] CALL transmit1() [L576] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=0] [L579] COND TRUE t1_pc == 1 [L595] token += 1 [L596] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L597] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L829] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L800] int tmp ; [L801] int tmp___0 ; [L805] CALL, EXPR is_master_triggered() [L609] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L612] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L613] COND TRUE E_M == 1 [L614] __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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L624] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND TRUE \read(tmp) [L808] m_st = 0 [L813] CALL, EXPR is_transmit1_triggered() [L628] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L631] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L632] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L641] __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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L643] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L829] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L597] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L598] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, token=1] [L587] COND TRUE 1 [L589] t1_pc = 1 [L590] t1_st = 2 [L728] RET transmit1() [L698] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=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] [L701] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] [L673] int __retres1 ; [L676] COND TRUE m_st == 0 [L677] __retres1 = 1 [L689] return (__retres1); [L701] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=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] [L701] tmp = exists_runnable_thread2() [L703] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=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] [L708] COND TRUE m_st == 0 [L709] int tmp_ndt_1; [L710] tmp_ndt_1 = __VERIFIER_nondet_int() [L711] COND TRUE \read(tmp_ndt_1) [L713] m_st = 1 [L714] CALL master() [L518] int tmp_var = __VERIFIER_nondet_int(); [L520] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L523] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L545] COND FALSE !(token != local + 1) [L550] COND TRUE tmp_var <= 5 [L551] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L556] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L557] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L558] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, tmp_var=5, token=1] [L559] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] [L496] 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_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, token=1] - UnprovableResult [Line: 28]: 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 16 procedures, 145 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 47.8s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 17.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3981 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3909 mSDsluCounter, 8853 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6017 mSDsCounter, 1164 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6277 IncrementalHoareTripleChecker+Invalid, 7441 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1164 mSolverCounterUnsat, 3657 mSDtfsCounter, 6277 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 887 GetRequests, 679 SyntacticMatches, 11 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 23.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2785occurred in iteration=19, InterpolantAutomatonStates: 136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 2195 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 1792 NumberOfCodeBlocks, 1757 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1791 ConstructedInterpolants, 0 QuantifiedInterpolants, 4254 SizeOfPredicates, 4 NumberOfNonLiveVariables, 2020 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 27 InterpolantComputations, 17 PerfectInterpolantSequences, 521/592 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: OVERALL_TIME: 2.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 54, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 59, TOOLS_POST_TIME: 1.0s, TOOLS_POST_CALL_APPLICATIONS: 25, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 102, TOOLS_QUANTIFIERELIM_TIME: 1.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 162, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 21, DOMAIN_JOIN_TIME: 0.6s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 54, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 7, CALL_SUMMARIZER_OVERALL_TIME: 0.1s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 888, DAG_COMPRESSION_RETAINED_NODES: 150, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 02:20:04,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b1dba45-6c7c-47de-9284-85f762878cdd/bin/utaipan-EQgc7hIp5V/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