./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.02.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.02.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta --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 2cbfaf31aa56f767af01fea9a12ccb47d60ab19076d72b85e8ca46d6ff778e4c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:42:09,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:42:09,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:42:09,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:42:09,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:42:09,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:42:09,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:42:09,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:42:09,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:42:09,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:42:09,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:42:09,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:42:09,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:42:09,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:42:09,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:42:09,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:42:09,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:42:09,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:42:09,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:42:09,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:42:09,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:42:09,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:42:09,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:42:09,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:42:09,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:42:09,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:42:09,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:42:09,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:42:09,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:42:09,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:42:09,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:42:09,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:42:09,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:42:09,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:42:09,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:42:09,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:42:09,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:42:09,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:42:09,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:42:09,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:42:09,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:42:09,365 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:42:09,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:42:09,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:42:09,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:42:09,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:42:09,416 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:42:09,416 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:42:09,416 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:42:09,417 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:42:09,417 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:42:09,417 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:42:09,418 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:42:09,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:42:09,419 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:42:09,419 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:42:09,419 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:42:09,420 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:42:09,420 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:42:09,420 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:42:09,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:42:09,421 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:42:09,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:42:09,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:42:09,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:42:09,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:42:09,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:42:09,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:42:09,423 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:42:09,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:42:09,423 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:42:09,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:42:09,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:42:09,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:42:09,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:09,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:42:09,425 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:42:09,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:42:09,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:42:09,426 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:42:09,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:42:09,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:42:09,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:42:09,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cbfaf31aa56f767af01fea9a12ccb47d60ab19076d72b85e8ca46d6ff778e4c [2022-10-17 17:42:09,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:42:09,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:42:09,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:42:09,738 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:42:09,739 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:42:09,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/systemc/transmitter.02.cil.c [2022-10-17 17:42:09,822 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/data/1877b904c/80403f61b597431e8a72db1e0e106823/FLAG0040a1b9b [2022-10-17 17:42:10,320 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:42:10,321 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/sv-benchmarks/c/systemc/transmitter.02.cil.c [2022-10-17 17:42:10,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/data/1877b904c/80403f61b597431e8a72db1e0e106823/FLAG0040a1b9b [2022-10-17 17:42:10,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/data/1877b904c/80403f61b597431e8a72db1e0e106823 [2022-10-17 17:42:10,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:42:10,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:42:10,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:10,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:42:10,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:42:10,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:10" (1/1) ... [2022-10-17 17:42:10,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f0d992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:10, skipping insertion in model container [2022-10-17 17:42:10,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:10" (1/1) ... [2022-10-17 17:42:10,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:42:10,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:42:10,930 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_e55586b0-6134-48c6-b8c6-0663b56a2d5b/sv-benchmarks/c/systemc/transmitter.02.cil.c[706,719] [2022-10-17 17:42:10,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:11,010 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:42:11,026 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_e55586b0-6134-48c6-b8c6-0663b56a2d5b/sv-benchmarks/c/systemc/transmitter.02.cil.c[706,719] [2022-10-17 17:42:11,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:11,106 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:42:11,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11 WrapperNode [2022-10-17 17:42:11,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:11,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:11,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:42:11,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:42:11,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,168 INFO L138 Inliner]: procedures = 32, calls = 36, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 264 [2022-10-17 17:42:11,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:11,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:42:11,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:42:11,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:42:11,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,198 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:42:11,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:42:11,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:42:11,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:42:11,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (1/1) ... [2022-10-17 17:42:11,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:11,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:42:11,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:42:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:42:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-10-17 17:42:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-10-17 17:42:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-10-17 17:42:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-10-17 17:42:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:42:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:42:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-10-17 17:42:11,300 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-10-17 17:42:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-10-17 17:42:11,300 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-10-17 17:42:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:42:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-10-17 17:42:11,301 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-10-17 17:42:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:42:11,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:42:11,384 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:42:11,386 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:42:11,821 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:42:12,038 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:42:12,039 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-17 17:42:12,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:12 BoogieIcfgContainer [2022-10-17 17:42:12,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:42:12,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:42:12,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:42:12,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:42:12,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:42:10" (1/3) ... [2022-10-17 17:42:12,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27452d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:12, skipping insertion in model container [2022-10-17 17:42:12,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:11" (2/3) ... [2022-10-17 17:42:12,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27452d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:12, skipping insertion in model container [2022-10-17 17:42:12,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:12" (3/3) ... [2022-10-17 17:42:12,051 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.02.cil.c [2022-10-17 17:42:12,070 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:42:12,071 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:42:12,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:42:12,152 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@482a5c45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:42:12,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:42:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 53 states have (on average 1.490566037735849) internal successors, (79), 55 states have internal predecessors, (79), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:42:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 17:42:12,179 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:12,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:12,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash 142617667, now seen corresponding path program 1 times [2022-10-17 17:42:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:12,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728797603] [2022-10-17 17:42:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:12,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:12,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728797603] [2022-10-17 17:42:12,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728797603] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:12,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:12,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755733705] [2022-10-17 17:42:12,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:12,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:12,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:12,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:12,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:12,615 INFO L87 Difference]: Start difference. First operand has 76 states, 53 states have (on average 1.490566037735849) internal successors, (79), 55 states have internal predecessors, (79), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:12,993 INFO L93 Difference]: Finished difference Result 215 states and 312 transitions. [2022-10-17 17:42:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:12,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-10-17 17:42:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:13,007 INFO L225 Difference]: With dead ends: 215 [2022-10-17 17:42:13,007 INFO L226 Difference]: Without dead ends: 140 [2022-10-17 17:42:13,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:13,015 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 177 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:13,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 242 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:42:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-10-17 17:42:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-10-17 17:42:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 99 states have internal predecessors, (133), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-10-17 17:42:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 185 transitions. [2022-10-17 17:42:13,083 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 185 transitions. Word has length 37 [2022-10-17 17:42:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:13,084 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 185 transitions. [2022-10-17 17:42:13,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 185 transitions. [2022-10-17 17:42:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 17:42:13,087 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:13,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:42:13,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1529899964, now seen corresponding path program 1 times [2022-10-17 17:42:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:13,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125006814] [2022-10-17 17:42:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:13,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125006814] [2022-10-17 17:42:13,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125006814] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:13,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:13,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:42:13,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815895323] [2022-10-17 17:42:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:13,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:42:13,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:42:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:42:13,322 INFO L87 Difference]: Start difference. First operand 136 states and 185 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:13,793 INFO L93 Difference]: Finished difference Result 761 states and 1084 transitions. [2022-10-17 17:42:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:42:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-10-17 17:42:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:13,814 INFO L225 Difference]: With dead ends: 761 [2022-10-17 17:42:13,815 INFO L226 Difference]: Without dead ends: 630 [2022-10-17 17:42:13,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:13,829 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 371 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:13,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 366 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:42:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-10-17 17:42:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 598. [2022-10-17 17:42:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 429 states have (on average 1.331002331002331) internal successors, (571), 437 states have internal predecessors, (571), 108 states have call successors, (108), 60 states have call predecessors, (108), 60 states have return successors, (146), 101 states have call predecessors, (146), 108 states have call successors, (146) [2022-10-17 17:42:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 825 transitions. [2022-10-17 17:42:13,964 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 825 transitions. Word has length 37 [2022-10-17 17:42:13,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:13,964 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 825 transitions. [2022-10-17 17:42:13,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 825 transitions. [2022-10-17 17:42:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 17:42:13,971 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:13,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:13,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:42:13,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash 813563700, now seen corresponding path program 1 times [2022-10-17 17:42:13,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:13,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032288587] [2022-10-17 17:42:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:13,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:14,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032288587] [2022-10-17 17:42:14,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032288587] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:14,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:14,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:42:14,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163941702] [2022-10-17 17:42:14,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:14,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:42:14,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:42:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:14,289 INFO L87 Difference]: Start difference. First operand 598 states and 825 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:14,699 INFO L93 Difference]: Finished difference Result 1619 states and 2238 transitions. [2022-10-17 17:42:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:42:14,700 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-10-17 17:42:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:14,715 INFO L225 Difference]: With dead ends: 1619 [2022-10-17 17:42:14,716 INFO L226 Difference]: Without dead ends: 1027 [2022-10-17 17:42:14,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:42:14,728 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 256 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:14,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 218 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-10-17 17:42:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 923. [2022-10-17 17:42:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 672 states have (on average 1.3095238095238095) internal successors, (880), 681 states have internal predecessors, (880), 154 states have call successors, (154), 94 states have call predecessors, (154), 96 states have return successors, (207), 148 states have call predecessors, (207), 154 states have call successors, (207) [2022-10-17 17:42:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1241 transitions. [2022-10-17 17:42:14,925 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1241 transitions. Word has length 40 [2022-10-17 17:42:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:14,925 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1241 transitions. [2022-10-17 17:42:14,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:42:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1241 transitions. [2022-10-17 17:42:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 17:42:14,933 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:14,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:14,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:42:14,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1971447342, now seen corresponding path program 1 times [2022-10-17 17:42:14,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:14,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576432422] [2022-10-17 17:42:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:14,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:15,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:15,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576432422] [2022-10-17 17:42:15,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576432422] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:15,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:15,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:15,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807741164] [2022-10-17 17:42:15,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:15,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:15,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:15,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:15,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:15,053 INFO L87 Difference]: Start difference. First operand 923 states and 1241 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 17:42:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:15,274 INFO L93 Difference]: Finished difference Result 2017 states and 2758 transitions. [2022-10-17 17:42:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-10-17 17:42:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:15,285 INFO L225 Difference]: With dead ends: 2017 [2022-10-17 17:42:15,286 INFO L226 Difference]: Without dead ends: 1459 [2022-10-17 17:42:15,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:15,289 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 75 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:15,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 175 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-10-17 17:42:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 922. [2022-10-17 17:42:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 673 states have (on average 1.2927191679049035) internal successors, (870), 679 states have internal predecessors, (870), 154 states have call successors, (154), 94 states have call predecessors, (154), 94 states have return successors, (180), 149 states have call predecessors, (180), 154 states have call successors, (180) [2022-10-17 17:42:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1204 transitions. [2022-10-17 17:42:15,418 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1204 transitions. Word has length 41 [2022-10-17 17:42:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:15,419 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1204 transitions. [2022-10-17 17:42:15,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 17:42:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1204 transitions. [2022-10-17 17:42:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-17 17:42:15,421 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:15,421 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:42:15,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:42:15,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2062055345, now seen corresponding path program 1 times [2022-10-17 17:42:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:15,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009760722] [2022-10-17 17:42:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:15,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:42:15,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009760722] [2022-10-17 17:42:15,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009760722] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:15,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:15,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:42:15,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322497571] [2022-10-17 17:42:15,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:42:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:42:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:15,646 INFO L87 Difference]: Start difference. First operand 922 states and 1204 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:42:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:16,120 INFO L93 Difference]: Finished difference Result 2628 states and 3425 transitions. [2022-10-17 17:42:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:42:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2022-10-17 17:42:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:16,136 INFO L225 Difference]: With dead ends: 2628 [2022-10-17 17:42:16,136 INFO L226 Difference]: Without dead ends: 1712 [2022-10-17 17:42:16,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:42:16,145 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 244 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:16,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 239 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-10-17 17:42:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1606. [2022-10-17 17:42:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1173 states have (on average 1.2745098039215685) internal successors, (1495), 1183 states have internal predecessors, (1495), 266 states have call successors, (266), 166 states have call predecessors, (266), 166 states have return successors, (312), 257 states have call predecessors, (312), 266 states have call successors, (312) [2022-10-17 17:42:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2073 transitions. [2022-10-17 17:42:16,382 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2073 transitions. Word has length 51 [2022-10-17 17:42:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:16,383 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 2073 transitions. [2022-10-17 17:42:16,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:42:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2073 transitions. [2022-10-17 17:42:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 17:42:16,385 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:16,385 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:42:16,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:42:16,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:16,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2097110743, now seen corresponding path program 1 times [2022-10-17 17:42:16,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:16,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62724099] [2022-10-17 17:42:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:16,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:42:16,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:16,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62724099] [2022-10-17 17:42:16,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62724099] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:16,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:16,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:16,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333617241] [2022-10-17 17:42:16,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:16,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:16,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:16,451 INFO L87 Difference]: Start difference. First operand 1606 states and 2073 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:42:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:16,730 INFO L93 Difference]: Finished difference Result 2835 states and 3723 transitions. [2022-10-17 17:42:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-10-17 17:42:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:16,747 INFO L225 Difference]: With dead ends: 2835 [2022-10-17 17:42:16,747 INFO L226 Difference]: Without dead ends: 2096 [2022-10-17 17:42:16,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:16,753 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 50 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:16,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 219 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2022-10-17 17:42:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1759. [2022-10-17 17:42:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1302 states have (on average 1.2849462365591398) internal successors, (1673), 1312 states have internal predecessors, (1673), 278 states have call successors, (278), 178 states have call predecessors, (278), 178 states have return successors, (324), 269 states have call predecessors, (324), 278 states have call successors, (324) [2022-10-17 17:42:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2275 transitions. [2022-10-17 17:42:16,991 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2275 transitions. Word has length 53 [2022-10-17 17:42:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:16,991 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 2275 transitions. [2022-10-17 17:42:16,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:42:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2275 transitions. [2022-10-17 17:42:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 17:42:16,996 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:16,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:16,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:42:16,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1235491369, now seen corresponding path program 1 times [2022-10-17 17:42:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:16,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417221861] [2022-10-17 17:42:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:16,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:42:17,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:17,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417221861] [2022-10-17 17:42:17,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417221861] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:17,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:17,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266414695] [2022-10-17 17:42:17,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:17,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:17,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:17,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:17,167 INFO L87 Difference]: Start difference. First operand 1759 states and 2275 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:17,525 INFO L93 Difference]: Finished difference Result 3178 states and 4168 transitions. [2022-10-17 17:42:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-10-17 17:42:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:17,543 INFO L225 Difference]: With dead ends: 3178 [2022-10-17 17:42:17,543 INFO L226 Difference]: Without dead ends: 2286 [2022-10-17 17:42:17,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:17,549 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 93 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:17,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 210 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-10-17 17:42:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2204. [2022-10-17 17:42:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 1707 states have (on average 1.2724077328646748) internal successors, (2172), 1720 states have internal predecessors, (2172), 280 states have call successors, (280), 213 states have call predecessors, (280), 216 states have return successors, (350), 271 states have call predecessors, (350), 280 states have call successors, (350) [2022-10-17 17:42:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2802 transitions. [2022-10-17 17:42:17,827 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2802 transitions. Word has length 73 [2022-10-17 17:42:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:17,828 INFO L495 AbstractCegarLoop]: Abstraction has 2204 states and 2802 transitions. [2022-10-17 17:42:17,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:42:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2802 transitions. [2022-10-17 17:42:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 17:42:17,832 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:17,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:17,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:42:17,833 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:17,834 INFO L85 PathProgramCache]: Analyzing trace with hash -58887050, now seen corresponding path program 1 times [2022-10-17 17:42:17,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:17,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733019836] [2022-10-17 17:42:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:17,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:42:17,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:17,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733019836] [2022-10-17 17:42:17,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733019836] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:17,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:17,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614775845] [2022-10-17 17:42:17,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:17,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:17,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:17,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:17,912 INFO L87 Difference]: Start difference. First operand 2204 states and 2802 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:42:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:18,307 INFO L93 Difference]: Finished difference Result 3289 states and 4305 transitions. [2022-10-17 17:42:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2022-10-17 17:42:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:18,324 INFO L225 Difference]: With dead ends: 3289 [2022-10-17 17:42:18,324 INFO L226 Difference]: Without dead ends: 2174 [2022-10-17 17:42:18,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:18,328 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 168 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:18,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 242 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-10-17 17:42:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2152. [2022-10-17 17:42:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1661 states have (on average 1.2450331125827814) internal successors, (2068), 1668 states have internal predecessors, (2068), 280 states have call successors, (280), 213 states have call predecessors, (280), 210 states have return successors, (341), 271 states have call predecessors, (341), 280 states have call successors, (341) [2022-10-17 17:42:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2689 transitions. [2022-10-17 17:42:18,618 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2689 transitions. Word has length 73 [2022-10-17 17:42:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:18,618 INFO L495 AbstractCegarLoop]: Abstraction has 2152 states and 2689 transitions. [2022-10-17 17:42:18,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:42:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2689 transitions. [2022-10-17 17:42:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 17:42:18,624 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:18,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:18,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:42:18,625 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:18,625 INFO L85 PathProgramCache]: Analyzing trace with hash -676897299, now seen corresponding path program 1 times [2022-10-17 17:42:18,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:18,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739866164] [2022-10-17 17:42:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:18,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:42:18,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739866164] [2022-10-17 17:42:18,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739866164] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:18,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:18,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:42:18,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662517217] [2022-10-17 17:42:18,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:18,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:18,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:18,697 INFO L87 Difference]: Start difference. First operand 2152 states and 2689 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-10-17 17:42:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:19,047 INFO L93 Difference]: Finished difference Result 4390 states and 5534 transitions. [2022-10-17 17:42:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2022-10-17 17:42:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:19,066 INFO L225 Difference]: With dead ends: 4390 [2022-10-17 17:42:19,066 INFO L226 Difference]: Without dead ends: 2443 [2022-10-17 17:42:19,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:19,074 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:19,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 205 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2022-10-17 17:42:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2263. [2022-10-17 17:42:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 1754 states have (on average 1.2508551881413912) internal successors, (2194), 1761 states have internal predecessors, (2194), 289 states have call successors, (289), 222 states have call predecessors, (289), 219 states have return successors, (350), 280 states have call predecessors, (350), 289 states have call successors, (350) [2022-10-17 17:42:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 2833 transitions. [2022-10-17 17:42:19,354 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 2833 transitions. Word has length 74 [2022-10-17 17:42:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:19,354 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 2833 transitions. [2022-10-17 17:42:19,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-10-17 17:42:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 2833 transitions. [2022-10-17 17:42:19,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 17:42:19,357 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:19,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:19,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:42:19,358 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2045377787, now seen corresponding path program 1 times [2022-10-17 17:42:19,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:19,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528983191] [2022-10-17 17:42:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:19,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:42:19,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:19,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528983191] [2022-10-17 17:42:19,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528983191] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:19,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:19,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:42:19,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753647826] [2022-10-17 17:42:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:19,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:42:19,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:42:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:42:19,566 INFO L87 Difference]: Start difference. First operand 2263 states and 2833 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-10-17 17:42:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:20,097 INFO L93 Difference]: Finished difference Result 4091 states and 5172 transitions. [2022-10-17 17:42:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:42:20,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2022-10-17 17:42:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:20,122 INFO L225 Difference]: With dead ends: 4091 [2022-10-17 17:42:20,122 INFO L226 Difference]: Without dead ends: 3157 [2022-10-17 17:42:20,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:20,127 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 70 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:20,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 291 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-10-17 17:42:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3047. [2022-10-17 17:42:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 2354 states have (on average 1.2412914188615123) internal successors, (2922), 2353 states have internal predecessors, (2922), 401 states have call successors, (401), 306 states have call predecessors, (401), 291 states have return successors, (500), 388 states have call predecessors, (500), 401 states have call successors, (500) [2022-10-17 17:42:20,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 3823 transitions. [2022-10-17 17:42:20,576 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 3823 transitions. Word has length 74 [2022-10-17 17:42:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:20,578 INFO L495 AbstractCegarLoop]: Abstraction has 3047 states and 3823 transitions. [2022-10-17 17:42:20,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-10-17 17:42:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 3823 transitions. [2022-10-17 17:42:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-10-17 17:42:20,591 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:20,591 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:20,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 17:42:20,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1399277634, now seen corresponding path program 1 times [2022-10-17 17:42:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:20,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716287906] [2022-10-17 17:42:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:20,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 17:42:21,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716287906] [2022-10-17 17:42:21,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716287906] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223001659] [2022-10-17 17:42:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:21,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:21,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:21,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:21,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:42:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 17:42:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:42:21,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:21,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223001659] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:21,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:21,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2022-10-17 17:42:21,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814462695] [2022-10-17 17:42:21,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:21,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:42:21,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:42:21,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:42:21,429 INFO L87 Difference]: Start difference. First operand 3047 states and 3823 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-10-17 17:42:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:22,154 INFO L93 Difference]: Finished difference Result 5333 states and 6812 transitions. [2022-10-17 17:42:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 17:42:22,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 94 [2022-10-17 17:42:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:22,170 INFO L225 Difference]: With dead ends: 5333 [2022-10-17 17:42:22,171 INFO L226 Difference]: Without dead ends: 2292 [2022-10-17 17:42:22,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:42:22,179 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 220 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:22,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 781 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:42:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2022-10-17 17:42:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1710. [2022-10-17 17:42:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1335 states have (on average 1.256928838951311) internal successors, (1678), 1336 states have internal predecessors, (1678), 213 states have call successors, (213), 163 states have call predecessors, (213), 161 states have return successors, (256), 211 states have call predecessors, (256), 213 states have call successors, (256) [2022-10-17 17:42:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2147 transitions. [2022-10-17 17:42:22,440 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2147 transitions. Word has length 94 [2022-10-17 17:42:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:22,440 INFO L495 AbstractCegarLoop]: Abstraction has 1710 states and 2147 transitions. [2022-10-17 17:42:22,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-10-17 17:42:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2147 transitions. [2022-10-17 17:42:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-10-17 17:42:22,446 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:22,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:22,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:22,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:22,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash 925896837, now seen corresponding path program 1 times [2022-10-17 17:42:22,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:22,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116522187] [2022-10-17 17:42:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:22,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:42:22,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:22,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116522187] [2022-10-17 17:42:22,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116522187] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:22,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:22,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:22,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130049527] [2022-10-17 17:42:22,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:22,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:22,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:22,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:22,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:22,746 INFO L87 Difference]: Start difference. First operand 1710 states and 2147 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 17:42:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:23,004 INFO L93 Difference]: Finished difference Result 2419 states and 3085 transitions. [2022-10-17 17:42:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2022-10-17 17:42:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:23,012 INFO L225 Difference]: With dead ends: 2419 [2022-10-17 17:42:23,012 INFO L226 Difference]: Without dead ends: 1165 [2022-10-17 17:42:23,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:23,018 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 148 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:23,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 234 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-10-17 17:42:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1153. [2022-10-17 17:42:23,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 902 states have (on average 1.2317073170731707) internal successors, (1111), 903 states have internal predecessors, (1111), 143 states have call successors, (143), 111 states have call predecessors, (143), 107 states have return successors, (149), 139 states have call predecessors, (149), 143 states have call successors, (149) [2022-10-17 17:42:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1403 transitions. [2022-10-17 17:42:23,176 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1403 transitions. Word has length 95 [2022-10-17 17:42:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:23,177 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 1403 transitions. [2022-10-17 17:42:23,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 17:42:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1403 transitions. [2022-10-17 17:42:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-10-17 17:42:23,181 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:23,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:23,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 17:42:23,182 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash -250707482, now seen corresponding path program 2 times [2022-10-17 17:42:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:23,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326136187] [2022-10-17 17:42:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:23,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-17 17:42:23,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326136187] [2022-10-17 17:42:23,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326136187] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:23,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:23,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:23,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626305456] [2022-10-17 17:42:23,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:23,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:23,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:23,260 INFO L87 Difference]: Start difference. First operand 1153 states and 1403 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 17:42:23,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:23,492 INFO L93 Difference]: Finished difference Result 1977 states and 2444 transitions. [2022-10-17 17:42:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:23,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2022-10-17 17:42:23,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:23,500 INFO L225 Difference]: With dead ends: 1977 [2022-10-17 17:42:23,501 INFO L226 Difference]: Without dead ends: 1265 [2022-10-17 17:42:23,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:23,504 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 101 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:23,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 159 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-10-17 17:42:23,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1265. [2022-10-17 17:42:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1005 states have (on average 1.207960199004975) internal successors, (1214), 1006 states have internal predecessors, (1214), 143 states have call successors, (143), 120 states have call predecessors, (143), 116 states have return successors, (149), 139 states have call predecessors, (149), 143 states have call successors, (149) [2022-10-17 17:42:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1506 transitions. [2022-10-17 17:42:23,676 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1506 transitions. Word has length 95 [2022-10-17 17:42:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:23,677 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1506 transitions. [2022-10-17 17:42:23,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 17:42:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1506 transitions. [2022-10-17 17:42:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-10-17 17:42:23,681 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:23,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:23,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 17:42:23,682 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:23,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1805135809, now seen corresponding path program 1 times [2022-10-17 17:42:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:23,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521490011] [2022-10-17 17:42:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:23,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-10-17 17:42:23,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:23,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521490011] [2022-10-17 17:42:23,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521490011] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:23,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71632434] [2022-10-17 17:42:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:23,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:23,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:23,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:42:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:23,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:42:23,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:42:24,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:42:24,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71632434] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:24,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:42:24,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-10-17 17:42:24,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336431577] [2022-10-17 17:42:24,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:24,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:24,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:24,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:24,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:24,198 INFO L87 Difference]: Start difference. First operand 1265 states and 1506 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:42:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:24,558 INFO L93 Difference]: Finished difference Result 3109 states and 3760 transitions. [2022-10-17 17:42:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-10-17 17:42:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:24,572 INFO L225 Difference]: With dead ends: 3109 [2022-10-17 17:42:24,573 INFO L226 Difference]: Without dead ends: 2028 [2022-10-17 17:42:24,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:24,578 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 114 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:24,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 204 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2022-10-17 17:42:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1516. [2022-10-17 17:42:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1219 states have (on average 1.2223133716160788) internal successors, (1490), 1222 states have internal predecessors, (1490), 161 states have call successors, (161), 138 states have call predecessors, (161), 135 states have return successors, (169), 156 states have call predecessors, (169), 161 states have call successors, (169) [2022-10-17 17:42:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 1820 transitions. [2022-10-17 17:42:24,813 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 1820 transitions. Word has length 96 [2022-10-17 17:42:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:24,815 INFO L495 AbstractCegarLoop]: Abstraction has 1516 states and 1820 transitions. [2022-10-17 17:42:24,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:42:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 1820 transitions. [2022-10-17 17:42:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-10-17 17:42:24,820 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:24,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:24,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 17:42:25,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:25,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1828497696, now seen corresponding path program 1 times [2022-10-17 17:42:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341768932] [2022-10-17 17:42:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-10-17 17:42:25,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:25,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341768932] [2022-10-17 17:42:25,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341768932] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:25,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:25,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:42:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924363425] [2022-10-17 17:42:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:42:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:42:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:25,116 INFO L87 Difference]: Start difference. First operand 1516 states and 1820 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 17:42:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:25,470 INFO L93 Difference]: Finished difference Result 2607 states and 3189 transitions. [2022-10-17 17:42:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:42:25,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 96 [2022-10-17 17:42:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:25,479 INFO L225 Difference]: With dead ends: 2607 [2022-10-17 17:42:25,479 INFO L226 Difference]: Without dead ends: 1275 [2022-10-17 17:42:25,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:42:25,486 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 148 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:25,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 208 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-10-17 17:42:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1271. [2022-10-17 17:42:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1022 states have (on average 1.1849315068493151) internal successors, (1211), 1021 states have internal predecessors, (1211), 137 states have call successors, (137), 114 states have call predecessors, (137), 111 states have return successors, (145), 136 states have call predecessors, (145), 137 states have call successors, (145) [2022-10-17 17:42:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1493 transitions. [2022-10-17 17:42:25,713 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1493 transitions. Word has length 96 [2022-10-17 17:42:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:25,713 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 1493 transitions. [2022-10-17 17:42:25,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 17:42:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1493 transitions. [2022-10-17 17:42:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-17 17:42:25,718 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:25,718 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 17:42:25,718 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1348095901, now seen corresponding path program 1 times [2022-10-17 17:42:25,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:25,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447781857] [2022-10-17 17:42:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:25,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:42:25,760 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:42:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:42:25,859 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:42:25,860 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:42:25,861 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:42:25,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 17:42:25,867 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:25,872 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:42:26,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:42:26 BoogieIcfgContainer [2022-10-17 17:42:26,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:42:26,035 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:42:26,035 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:42:26,035 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:42:26,036 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:12" (3/4) ... [2022-10-17 17:42:26,038 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-10-17 17:42:26,174 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/witness.graphml [2022-10-17 17:42:26,174 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:42:26,175 INFO L158 Benchmark]: Toolchain (without parser) took 15493.64ms. Allocated memory was 123.7MB in the beginning and 805.3MB in the end (delta: 681.6MB). Free memory was 82.5MB in the beginning and 578.2MB in the end (delta: -495.7MB). Peak memory consumption was 185.2MB. Max. memory is 16.1GB. [2022-10-17 17:42:26,176 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 123.7MB. Free memory was 99.4MB in the beginning and 99.4MB in the end (delta: 79.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:42:26,177 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.89ms. Allocated memory is still 123.7MB. Free memory was 82.3MB in the beginning and 92.1MB in the end (delta: -9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 17:42:26,177 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.74ms. Allocated memory is still 123.7MB. Free memory was 92.1MB in the beginning and 90.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:42:26,178 INFO L158 Benchmark]: Boogie Preprocessor took 34.33ms. Allocated memory is still 123.7MB. Free memory was 90.0MB in the beginning and 88.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:42:26,178 INFO L158 Benchmark]: RCFGBuilder took 837.32ms. Allocated memory is still 123.7MB. Free memory was 88.2MB in the beginning and 54.3MB in the end (delta: 33.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-10-17 17:42:26,179 INFO L158 Benchmark]: TraceAbstraction took 13990.25ms. Allocated memory was 123.7MB in the beginning and 805.3MB in the end (delta: 681.6MB). Free memory was 53.6MB in the beginning and 587.7MB in the end (delta: -534.1MB). Peak memory consumption was 150.0MB. Max. memory is 16.1GB. [2022-10-17 17:42:26,179 INFO L158 Benchmark]: Witness Printer took 139.64ms. Allocated memory is still 805.3MB. Free memory was 587.7MB in the beginning and 578.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 17:42:26,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 123.7MB. Free memory was 99.4MB in the beginning and 99.4MB in the end (delta: 79.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.89ms. Allocated memory is still 123.7MB. Free memory was 82.3MB in the beginning and 92.1MB in the end (delta: -9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.74ms. Allocated memory is still 123.7MB. Free memory was 92.1MB in the beginning and 90.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.33ms. Allocated memory is still 123.7MB. Free memory was 90.0MB in the beginning and 88.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 837.32ms. Allocated memory is still 123.7MB. Free memory was 88.2MB in the beginning and 54.3MB in the end (delta: 33.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13990.25ms. Allocated memory was 123.7MB in the beginning and 805.3MB in the end (delta: 681.6MB). Free memory was 53.6MB in the beginning and 587.7MB in the end (delta: -534.1MB). Peak memory consumption was 150.0MB. Max. memory is 16.1GB. * Witness Printer took 139.64ms. Allocated memory is still 805.3MB. Free memory was 587.7MB in the beginning and 578.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. 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: 21]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int m_pc = 0; [L26] int t1_pc = 0; [L27] int t2_pc = 0; [L28] int m_st ; [L29] int t1_st ; [L30] int t2_st ; [L31] int m_i ; [L32] int t1_i ; [L33] int t2_i ; [L34] int M_E = 2; [L35] int T1_E = 2; [L36] int T2_E = 2; [L37] int E_1 = 2; [L38] int E_2 = 2; [L573] int __retres1 ; [L577] CALL init_model() [L487] m_i = 1 [L488] t1_i = 1 [L489] t2_i = 1 [L577] RET init_model() [L578] CALL start_simulation() [L514] int kernel_st ; [L515] int tmp ; [L516] int tmp___0 ; [L520] kernel_st = 0 VAL [E_1=2, E_2=2, kernel_st=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L521] FCALL update_channels() VAL [E_1=2, E_2=2, kernel_st=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L522] CALL init_threads() [L221] COND TRUE m_i == 1 [L222] m_st = 0 [L226] COND TRUE t1_i == 1 [L227] t1_st = 0 [L231] COND TRUE t2_i == 1 [L232] t2_st = 0 [L522] RET init_threads() [L523] CALL fire_delta_events() VAL [\old(E_1)=2, \old(E_2)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L334] COND FALSE !(M_E == 0) [L339] COND FALSE !(T1_E == 0) [L344] COND FALSE !(T2_E == 0) [L349] COND FALSE !(E_1 == 0) [L354] COND FALSE !(E_2 == 0) [L523] RET fire_delta_events() VAL [E_1=2, E_2=2, kernel_st=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L524] CALL activate_threads() VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L397] int tmp ; [L398] int tmp___0 ; [L399] int tmp___1 ; [L403] CALL, EXPR is_master_triggered() [L153] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L156] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L166] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L168] return (__retres1); [L403] RET, EXPR is_master_triggered() [L403] tmp = is_master_triggered() [L405] COND FALSE !(\read(tmp)) [L411] CALL, EXPR is_transmit1_triggered() [L172] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L175] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L185] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L187] return (__retres1); [L411] RET, EXPR is_transmit1_triggered() [L411] tmp___0 = is_transmit1_triggered() [L413] COND FALSE !(\read(tmp___0)) [L419] CALL, EXPR is_transmit2_triggered() [L191] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L194] COND FALSE !(t2_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L204] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L206] return (__retres1); [L419] RET, EXPR is_transmit2_triggered() [L419] tmp___1 = is_transmit2_triggered() [L421] COND FALSE !(\read(tmp___1)) [L524] RET activate_threads() VAL [E_1=2, E_2=2, kernel_st=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L525] CALL reset_delta_events() VAL [\old(E_1)=2, \old(E_2)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L367] COND FALSE !(M_E == 1) [L372] COND FALSE !(T1_E == 1) [L377] COND FALSE !(T2_E == 1) [L382] COND FALSE !(E_1 == 1) [L387] COND FALSE !(E_2 == 1) [L525] RET reset_delta_events() VAL [E_1=2, E_2=2, kernel_st=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L528] COND TRUE 1 [L531] kernel_st = 1 [L532] CALL eval() [L267] int tmp ; VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L271] COND TRUE 1 VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L274] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L241] int __retres1 ; [L244] COND TRUE m_st == 0 [L245] __retres1 = 1 [L262] return (__retres1); [L274] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, exists_runnable_thread()=1, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L274] tmp = exists_runnable_thread() [L276] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, tmp=1] [L281] COND TRUE m_st == 0 [L282] int tmp_ndt_1; [L283] tmp_ndt_1 = __VERIFIER_nondet_int() [L284] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, tmp=1, tmp_ndt_1=0] [L295] COND TRUE t1_st == 0 [L296] int tmp_ndt_2; [L297] tmp_ndt_2 = __VERIFIER_nondet_int() [L298] COND TRUE \read(tmp_ndt_2) [L300] t1_st = 1 [L301] CALL transmit1() [L88] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0] [L99] COND TRUE 1 [L101] t1_pc = 1 [L102] t1_st = 2 [L301] RET transmit1() [L309] COND TRUE t2_st == 0 [L310] int tmp_ndt_3; [L311] tmp_ndt_3 = __VERIFIER_nondet_int() [L312] COND TRUE \read(tmp_ndt_3) [L314] t2_st = 1 [L315] CALL transmit2() [L123] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1] [L134] COND TRUE 1 [L136] t2_pc = 1 [L137] t2_st = 2 [L315] RET transmit2() [L271] COND TRUE 1 VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1] [L274] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L241] int __retres1 ; [L244] COND TRUE m_st == 0 [L245] __retres1 = 1 [L262] return (__retres1); [L274] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, exists_runnable_thread()=1, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1] [L274] tmp = exists_runnable_thread() [L276] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1] [L281] COND TRUE m_st == 0 [L282] int tmp_ndt_1; [L283] tmp_ndt_1 = __VERIFIER_nondet_int() [L284] COND TRUE \read(tmp_ndt_1) [L286] m_st = 1 [L287] CALL master() [L47] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L58] COND TRUE 1 [L61] E_1 = 1 VAL [E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L62] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L435] CALL activate_threads() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L397] int tmp ; [L398] int tmp___0 ; [L399] int tmp___1 ; [L403] CALL, EXPR is_master_triggered() [L153] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L156] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L166] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L168] return (__retres1); [L403] RET, EXPR is_master_triggered() [L403] tmp = is_master_triggered() [L405] COND FALSE !(\read(tmp)) [L411] CALL, EXPR is_transmit1_triggered() [L172] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L175] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L176] COND TRUE E_1 == 1 [L177] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=1, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L187] return (__retres1); [L411] RET, EXPR is_transmit1_triggered() [L411] tmp___0 = is_transmit1_triggered() [L413] COND TRUE \read(tmp___0) [L414] t1_st = 0 [L419] CALL, EXPR is_transmit2_triggered() [L191] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L194] COND TRUE t2_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L195] COND FALSE !(E_2 == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L204] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L206] return (__retres1); [L419] RET, EXPR is_transmit2_triggered() [L419] tmp___1 = is_transmit2_triggered() [L421] COND FALSE !(\read(tmp___1)) [L435] RET activate_threads() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L62] RET immediate_notify() VAL [E_1=1, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L63] E_1 = 2 VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L66] COND TRUE 1 [L68] m_pc = 1 [L69] m_st = 2 VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L287] RET master() [L295] COND TRUE t1_st == 0 [L296] int tmp_ndt_2; [L297] tmp_ndt_2 = __VERIFIER_nondet_int() [L298] COND TRUE \read(tmp_ndt_2) [L300] t1_st = 1 [L301] CALL transmit1() [L88] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L91] COND TRUE t1_pc == 1 [L107] E_2 = 1 VAL [E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L108] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L435] CALL activate_threads() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L397] int tmp ; [L398] int tmp___0 ; [L399] int tmp___1 ; [L403] CALL, EXPR is_master_triggered() [L153] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L156] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L157] COND FALSE !(M_E == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L166] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L168] return (__retres1); [L403] RET, EXPR is_master_triggered() [L403] tmp = is_master_triggered() [L405] COND FALSE !(\read(tmp)) [L411] CALL, EXPR is_transmit1_triggered() [L172] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L175] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L176] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L185] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L187] return (__retres1); [L411] RET, EXPR is_transmit1_triggered() [L411] tmp___0 = is_transmit1_triggered() [L413] COND FALSE !(\read(tmp___0)) [L419] CALL, EXPR is_transmit2_triggered() [L191] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L194] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L195] COND TRUE E_2 == 1 [L196] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=1, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2] [L206] return (__retres1); [L419] RET, EXPR is_transmit2_triggered() [L419] tmp___1 = is_transmit2_triggered() [L421] COND TRUE \read(tmp___1) [L422] t2_st = 0 [L435] RET activate_threads() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0] [L108] RET immediate_notify() VAL [E_1=2, E_2=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0] [L109] E_2 = 2 VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0] [L99] COND TRUE 1 [L101] t1_pc = 1 [L102] t1_st = 2 [L301] RET transmit1() [L309] COND TRUE t2_st == 0 [L310] int tmp_ndt_3; [L311] tmp_ndt_3 = __VERIFIER_nondet_int() [L312] COND TRUE \read(tmp_ndt_3) [L314] t2_st = 1 [L315] CALL transmit2() [L123] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1] [L126] COND TRUE t2_pc == 1 [L142] CALL error() [L21] reach_error() VAL [E_1=2, E_2=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.7s, OverallIterations: 16, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2311 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2276 mSDsluCounter, 3993 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2536 mSDsCounter, 402 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1904 IncrementalHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 402 mSolverCounterUnsat, 1911 mSDtfsCounter, 1904 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 303 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3047occurred in iteration=10, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 2624 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 1316 NumberOfCodeBlocks, 1316 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1202 ConstructedInterpolants, 0 QuantifiedInterpolants, 2342 SizeOfPredicates, 3 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 17 InterpolantComputations, 15 PerfectInterpolantSequences, 450/468 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-10-17 17:42:26,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e55586b0-6134-48c6-b8c6-0663b56a2d5b/bin/utaipan-G1rejxKTta/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