./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI --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 bc8487f898950b83c481f83a71342af68752fb6e7598d76df123761c32c89f72 --- 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-5e519f3 [2022-11-03 01:40:37,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:40:37,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:40:37,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:40:37,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:40:37,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:40:37,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:40:37,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:40:37,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:40:37,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:40:37,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:40:37,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:40:37,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:40:37,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:40:37,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:40:37,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:40:37,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:40:37,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:40:37,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:40:37,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:40:37,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:40:37,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:40:37,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:40:37,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:40:37,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:40:37,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:40:37,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:40:37,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:40:37,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:40:37,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:40:37,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:40:37,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:40:37,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:40:37,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:40:37,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:40:37,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:40:37,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:40:37,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:40:37,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:40:37,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:40:37,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:40:37,876 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:40:37,919 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:40:37,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:40:37,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:40:37,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:40:37,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:40:37,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:40:37,921 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:40:37,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:40:37,922 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:40:37,922 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:40:37,923 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:40:37,923 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:40:37,923 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:40:37,924 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:40:37,924 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:40:37,933 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:40:37,934 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:40:37,935 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:40:37,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:40:37,936 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:40:37,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:40:37,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:40:37,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:40:37,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:40:37,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:40:37,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:40:37,937 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:40:37,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:40:37,938 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:40:37,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:40:37,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:40:37,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:40:37,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:37,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:40:37,939 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:40:37,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:40:37,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:40:37,940 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:40:37,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:40:37,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:40:37,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:40:37,940 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_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc8487f898950b83c481f83a71342af68752fb6e7598d76df123761c32c89f72 [2022-11-03 01:40:38,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:40:38,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:40:38,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:40:38,299 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:40:38,300 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:40:38,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c [2022-11-03 01:40:38,363 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/data/239c3a169/9aca495625cb44e48a5cd2ba9a42f8b8/FLAGbd87437ee [2022-11-03 01:40:38,894 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:40:38,898 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/sv-benchmarks/c/systemc/token_ring.02.cil-2.c [2022-11-03 01:40:38,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/data/239c3a169/9aca495625cb44e48a5cd2ba9a42f8b8/FLAGbd87437ee [2022-11-03 01:40:39,226 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/data/239c3a169/9aca495625cb44e48a5cd2ba9a42f8b8 [2022-11-03 01:40:39,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:40:39,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:40:39,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:39,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:40:39,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:40:39,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b89623d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39, skipping insertion in model container [2022-11-03 01:40:39,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:40:39,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:40:39,478 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_395ded7f-706e-4093-acd2-fb04e7dbd178/sv-benchmarks/c/systemc/token_ring.02.cil-2.c[671,684] [2022-11-03 01:40:39,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:39,598 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:40:39,613 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_395ded7f-706e-4093-acd2-fb04e7dbd178/sv-benchmarks/c/systemc/token_ring.02.cil-2.c[671,684] [2022-11-03 01:40:39,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:39,677 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:40:39,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39 WrapperNode [2022-11-03 01:40:39,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:39,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:39,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:40:39,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:40:39,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,743 INFO L138 Inliner]: procedures = 32, calls = 38, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 278 [2022-11-03 01:40:39,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:39,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:40:39,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:40:39,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:40:39,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,782 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:40:39,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:40:39,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:40:39,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:40:39,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (1/1) ... [2022-11-03 01:40:39,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:39,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:39,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:40:39,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:40:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:40:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 01:40:39,887 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 01:40:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 01:40:39,888 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 01:40:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 01:40:39,888 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 01:40:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:40:39,888 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:40:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 01:40:39,889 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 01:40:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 01:40:39,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 01:40:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:40:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 01:40:39,889 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 01:40:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:40:39,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:40:40,022 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:40:40,025 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:40:40,488 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:40:40,618 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:40:40,618 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-03 01:40:40,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:40 BoogieIcfgContainer [2022-11-03 01:40:40,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:40:40,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:40:40,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:40:40,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:40:40,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:40:39" (1/3) ... [2022-11-03 01:40:40,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40de770f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:40, skipping insertion in model container [2022-11-03 01:40:40,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:39" (2/3) ... [2022-11-03 01:40:40,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40de770f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:40, skipping insertion in model container [2022-11-03 01:40:40,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:40" (3/3) ... [2022-11-03 01:40:40,639 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2022-11-03 01:40:40,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:40:40,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:40:40,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:40:40,760 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;@6146e032, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:40:40,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:40:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 61 states have internal predecessors, (86), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 01:40:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:40:40,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:40,776 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] [2022-11-03 01:40:40,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:40,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:40,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1420542470, now seen corresponding path program 1 times [2022-11-03 01:40:40,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:40,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239646670] [2022-11-03 01:40:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:40,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:40:41,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:41,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239646670] [2022-11-03 01:40:41,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239646670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:41,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:41,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:40:41,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593535452] [2022-11-03 01:40:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:41,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:41,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:41,259 INFO L87 Difference]: Start difference. First operand has 84 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 61 states have internal predecessors, (86), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:40:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:41,669 INFO L93 Difference]: Finished difference Result 229 states and 338 transitions. [2022-11-03 01:40:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:40:41,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-11-03 01:40:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:41,681 INFO L225 Difference]: With dead ends: 229 [2022-11-03 01:40:41,681 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 01:40:41,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:41,690 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 190 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:41,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 262 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:40:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 01:40:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-11-03 01:40:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 102 states have (on average 1.392156862745098) internal successors, (142), 105 states have internal predecessors, (142), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-03 01:40:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 200 transitions. [2022-11-03 01:40:41,747 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 200 transitions. Word has length 37 [2022-11-03 01:40:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:41,748 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 200 transitions. [2022-11-03 01:40:41,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:40:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 200 transitions. [2022-11-03 01:40:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:40:41,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:41,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:40:41,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:40:41,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1471515733, now seen corresponding path program 1 times [2022-11-03 01:40:41,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:41,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997802462] [2022-11-03 01:40:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:41,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:40:41,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:41,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997802462] [2022-11-03 01:40:41,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997802462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:41,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667239401] [2022-11-03 01:40:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:41,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:41,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:41,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:40:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:40:42,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:40:42,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:42,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667239401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:42,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:42,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 01:40:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027765765] [2022-11-03 01:40:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:42,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:42,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:42,191 INFO L87 Difference]: Start difference. First operand 145 states and 200 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:40:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:42,278 INFO L93 Difference]: Finished difference Result 418 states and 583 transitions. [2022-11-03 01:40:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-11-03 01:40:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:42,283 INFO L225 Difference]: With dead ends: 418 [2022-11-03 01:40:42,283 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 01:40:42,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:42,287 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 90 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:42,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 215 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 01:40:42,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 272. [2022-11-03 01:40:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 195 states have (on average 1.3794871794871795) internal successors, (269), 199 states have internal predecessors, (269), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 01:40:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 371 transitions. [2022-11-03 01:40:42,321 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 371 transitions. Word has length 66 [2022-11-03 01:40:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:42,322 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 371 transitions. [2022-11-03 01:40:42,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:40:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 371 transitions. [2022-11-03 01:40:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:40:42,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:42,326 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:40:42,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:42,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:42,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1873095435, now seen corresponding path program 1 times [2022-11-03 01:40:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:42,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412221712] [2022-11-03 01:40:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:42,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:40:43,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412221712] [2022-11-03 01:40:43,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412221712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:43,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:43,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:40:43,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269507913] [2022-11-03 01:40:43,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:43,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:40:43,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:40:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:43,059 INFO L87 Difference]: Start difference. First operand 272 states and 371 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:40:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:43,411 INFO L93 Difference]: Finished difference Result 832 states and 1136 transitions. [2022-11-03 01:40:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:40:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-11-03 01:40:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:43,424 INFO L225 Difference]: With dead ends: 832 [2022-11-03 01:40:43,424 INFO L226 Difference]: Without dead ends: 566 [2022-11-03 01:40:43,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:40:43,434 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 259 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:43,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 267 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-03 01:40:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 510. [2022-11-03 01:40:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 367 states have (on average 1.3596730245231607) internal successors, (499), 373 states have internal predecessors, (499), 94 states have call successors, (94), 49 states have call predecessors, (94), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 01:40:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 685 transitions. [2022-11-03 01:40:43,555 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 685 transitions. Word has length 66 [2022-11-03 01:40:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:43,556 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 685 transitions. [2022-11-03 01:40:43,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:40:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 685 transitions. [2022-11-03 01:40:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:40:43,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:43,560 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:40:43,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:40:43,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1001459905, now seen corresponding path program 1 times [2022-11-03 01:40:43,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:43,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337128869] [2022-11-03 01:40:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:40:43,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:43,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337128869] [2022-11-03 01:40:43,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337128869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:43,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:43,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:40:43,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549536607] [2022-11-03 01:40:43,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:43,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:40:43,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:40:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:43,925 INFO L87 Difference]: Start difference. First operand 510 states and 685 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:40:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:44,340 INFO L93 Difference]: Finished difference Result 1276 states and 1721 transitions. [2022-11-03 01:40:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:40:44,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2022-11-03 01:40:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:44,351 INFO L225 Difference]: With dead ends: 1276 [2022-11-03 01:40:44,351 INFO L226 Difference]: Without dead ends: 772 [2022-11-03 01:40:44,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:40:44,361 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 245 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:44,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 236 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-11-03 01:40:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 744. [2022-11-03 01:40:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 535 states have (on average 1.3439252336448597) internal successors, (719), 543 states have internal predecessors, (719), 136 states have call successors, (136), 73 states have call predecessors, (136), 72 states have return successors, (134), 128 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-03 01:40:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 989 transitions. [2022-11-03 01:40:44,468 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 989 transitions. Word has length 67 [2022-11-03 01:40:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:44,469 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 989 transitions. [2022-11-03 01:40:44,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:40:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 989 transitions. [2022-11-03 01:40:44,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 01:40:44,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:44,475 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:40:44,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:40:44,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:44,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1009736655, now seen corresponding path program 1 times [2022-11-03 01:40:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:44,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979794727] [2022-11-03 01:40:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:40:44,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:44,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979794727] [2022-11-03 01:40:44,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979794727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:44,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:44,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:44,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914927890] [2022-11-03 01:40:44,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:44,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:44,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:44,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:44,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:44,581 INFO L87 Difference]: Start difference. First operand 744 states and 989 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:40:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:44,735 INFO L93 Difference]: Finished difference Result 1309 states and 1755 transitions. [2022-11-03 01:40:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:44,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2022-11-03 01:40:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:44,740 INFO L225 Difference]: With dead ends: 1309 [2022-11-03 01:40:44,741 INFO L226 Difference]: Without dead ends: 917 [2022-11-03 01:40:44,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:44,743 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 36 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:44,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 229 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-11-03 01:40:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 824. [2022-11-03 01:40:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 603 states have (on average 1.3548922056384742) internal successors, (817), 611 states have internal predecessors, (817), 142 states have call successors, (142), 79 states have call predecessors, (142), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-03 01:40:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1099 transitions. [2022-11-03 01:40:44,836 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1099 transitions. Word has length 68 [2022-11-03 01:40:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:44,837 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1099 transitions. [2022-11-03 01:40:44,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:40:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1099 transitions. [2022-11-03 01:40:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 01:40:44,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:44,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:44,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:40:44,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 492638569, now seen corresponding path program 1 times [2022-11-03 01:40:44,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:44,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663793788] [2022-11-03 01:40:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 01:40:44,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:44,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663793788] [2022-11-03 01:40:44,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663793788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:44,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:44,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344091699] [2022-11-03 01:40:44,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:44,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:44,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:44,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:44,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:44,941 INFO L87 Difference]: Start difference. First operand 824 states and 1099 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:40:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:45,124 INFO L93 Difference]: Finished difference Result 2051 states and 2751 transitions. [2022-11-03 01:40:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 87 [2022-11-03 01:40:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:45,132 INFO L225 Difference]: With dead ends: 2051 [2022-11-03 01:40:45,132 INFO L226 Difference]: Without dead ends: 1232 [2022-11-03 01:40:45,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:45,135 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 83 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:45,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 216 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:40:45,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-11-03 01:40:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1219. [2022-11-03 01:40:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 894 states have (on average 1.3355704697986577) internal successors, (1194), 905 states have internal predecessors, (1194), 207 states have call successors, (207), 118 states have call predecessors, (207), 117 states have return successors, (205), 196 states have call predecessors, (205), 205 states have call successors, (205) [2022-11-03 01:40:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1606 transitions. [2022-11-03 01:40:45,254 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1606 transitions. Word has length 87 [2022-11-03 01:40:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:45,255 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1606 transitions. [2022-11-03 01:40:45,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:40:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1606 transitions. [2022-11-03 01:40:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 01:40:45,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:45,260 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:45,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:40:45,260 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash -158457828, now seen corresponding path program 1 times [2022-11-03 01:40:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082139385] [2022-11-03 01:40:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:45,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 01:40:45,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:45,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082139385] [2022-11-03 01:40:45,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082139385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:45,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299666213] [2022-11-03 01:40:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:45,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:45,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:45,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:45,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:40:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:40:45,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:40:45,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299666213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:45,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:45,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:40:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093031039] [2022-11-03 01:40:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:45,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:45,561 INFO L87 Difference]: Start difference. First operand 1219 states and 1606 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:40:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:45,754 INFO L93 Difference]: Finished difference Result 2311 states and 3071 transitions. [2022-11-03 01:40:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:45,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2022-11-03 01:40:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:45,763 INFO L225 Difference]: With dead ends: 2311 [2022-11-03 01:40:45,763 INFO L226 Difference]: Without dead ends: 1499 [2022-11-03 01:40:45,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:45,769 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 59 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 240 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 [2022-11-03 01:40:45,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 240 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:40:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-11-03 01:40:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1324. [2022-11-03 01:40:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 981 states have (on average 1.342507645259939) internal successors, (1317), 992 states have internal predecessors, (1317), 216 states have call successors, (216), 127 states have call predecessors, (216), 126 states have return successors, (214), 205 states have call predecessors, (214), 214 states have call successors, (214) [2022-11-03 01:40:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1747 transitions. [2022-11-03 01:40:45,929 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1747 transitions. Word has length 101 [2022-11-03 01:40:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:45,930 INFO L495 AbstractCegarLoop]: Abstraction has 1324 states and 1747 transitions. [2022-11-03 01:40:45,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:40:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1747 transitions. [2022-11-03 01:40:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 01:40:45,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:45,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:45,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:46,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:40:46,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:46,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:46,153 INFO L85 PathProgramCache]: Analyzing trace with hash 781696647, now seen corresponding path program 2 times [2022-11-03 01:40:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:46,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209941704] [2022-11-03 01:40:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:46,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 01:40:46,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209941704] [2022-11-03 01:40:46,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209941704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599770258] [2022-11-03 01:40:46,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:40:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:46,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:46,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:46,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:40:46,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:40:46,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:46,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:40:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 44 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:40:46,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:40:47,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599770258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:47,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20424843] [2022-11-03 01:40:47,213 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-03 01:40:47,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:47,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:47,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:47,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:51,702 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 38 for LOIs [2022-11-03 01:40:51,706 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 82 for LOIs [2022-11-03 01:40:51,727 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:40:51,737 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:40:52,723 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 82 for LOIs [2022-11-03 01:40:52,748 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 70 for LOIs [2022-11-03 01:40:52,755 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 50 for LOIs [2022-11-03 01:40:52,774 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 56 for LOIs [2022-11-03 01:40:52,924 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 50 for LOIs [2022-11-03 01:40:53,125 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:41:02,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21011#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (= ~t2_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-03 01:41:02,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:41:02,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:41:02,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-11-03 01:41:02,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032348500] [2022-11-03 01:41:02,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:41:02,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:41:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=3412, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 01:41:02,080 INFO L87 Difference]: Start difference. First operand 1324 states and 1747 transitions. Second operand has 17 states, 14 states have (on average 11.714285714285714) internal successors, (164), 16 states have internal predecessors, (164), 11 states have call successors, (28), 7 states have call predecessors, (28), 9 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-03 01:41:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:07,984 INFO L93 Difference]: Finished difference Result 8101 states and 10869 transitions. [2022-11-03 01:41:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-03 01:41:07,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 11.714285714285714) internal successors, (164), 16 states have internal predecessors, (164), 11 states have call successors, (28), 7 states have call predecessors, (28), 9 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) Word has length 101 [2022-11-03 01:41:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:08,030 INFO L225 Difference]: With dead ends: 8101 [2022-11-03 01:41:08,030 INFO L226 Difference]: Without dead ends: 6783 [2022-11-03 01:41:08,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 282 SyntacticMatches, 7 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7021 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1681, Invalid=15875, Unknown=0, NotChecked=0, Total=17556 [2022-11-03 01:41:08,043 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 1844 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 1213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 4097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1213 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:08,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 1309 Invalid, 4097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1213 Valid, 2884 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 01:41:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6783 states. [2022-11-03 01:41:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6783 to 4880. [2022-11-03 01:41:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4880 states, 3628 states have (on average 1.3004410143329659) internal successors, (4718), 3643 states have internal predecessors, (4718), 752 states have call successors, (752), 492 states have call predecessors, (752), 499 states have return successors, (766), 745 states have call predecessors, (766), 750 states have call successors, (766) [2022-11-03 01:41:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4880 states to 4880 states and 6236 transitions. [2022-11-03 01:41:08,645 INFO L78 Accepts]: Start accepts. Automaton has 4880 states and 6236 transitions. Word has length 101 [2022-11-03 01:41:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:08,646 INFO L495 AbstractCegarLoop]: Abstraction has 4880 states and 6236 transitions. [2022-11-03 01:41:08,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 11.714285714285714) internal successors, (164), 16 states have internal predecessors, (164), 11 states have call successors, (28), 7 states have call predecessors, (28), 9 states have return successors, (28), 10 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-03 01:41:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4880 states and 6236 transitions. [2022-11-03 01:41:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 01:41:08,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:08,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:08,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:08,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:08,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:08,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1778337552, now seen corresponding path program 1 times [2022-11-03 01:41:08,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:08,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776498779] [2022-11-03 01:41:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:08,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:41:08,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776498779] [2022-11-03 01:41:08,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776498779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271643146] [2022-11-03 01:41:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:08,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:08,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:09,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:41:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:09,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:09,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:09,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271643146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:09,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:09,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:41:09,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086192526] [2022-11-03 01:41:09,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:09,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:09,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:09,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:09,136 INFO L87 Difference]: Start difference. First operand 4880 states and 6236 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:09,822 INFO L93 Difference]: Finished difference Result 9344 states and 12061 transitions. [2022-11-03 01:41:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:09,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2022-11-03 01:41:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:09,851 INFO L225 Difference]: With dead ends: 9344 [2022-11-03 01:41:09,851 INFO L226 Difference]: Without dead ends: 5886 [2022-11-03 01:41:09,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:09,862 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 52 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:09,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 232 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:41:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2022-11-03 01:41:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 5327. [2022-11-03 01:41:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5327 states, 3995 states have (on average 1.3063829787234043) internal successors, (5219), 4010 states have internal predecessors, (5219), 792 states have call successors, (792), 532 states have call predecessors, (792), 539 states have return successors, (806), 785 states have call predecessors, (806), 790 states have call successors, (806) [2022-11-03 01:41:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5327 states to 5327 states and 6817 transitions. [2022-11-03 01:41:10,471 INFO L78 Accepts]: Start accepts. Automaton has 5327 states and 6817 transitions. Word has length 100 [2022-11-03 01:41:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:10,471 INFO L495 AbstractCegarLoop]: Abstraction has 5327 states and 6817 transitions. [2022-11-03 01:41:10,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5327 states and 6817 transitions. [2022-11-03 01:41:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 01:41:10,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:10,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:10,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:10,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:10,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash 691682182, now seen corresponding path program 1 times [2022-11-03 01:41:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:10,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952427925] [2022-11-03 01:41:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:10,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:41:10,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952427925] [2022-11-03 01:41:10,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952427925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826742796] [2022-11-03 01:41:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:10,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:10,769 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:10,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:41:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:10,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:10,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:41:10,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:10,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826742796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:10,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:10,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 01:41:10,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137608846] [2022-11-03 01:41:10,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:10,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:10,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:10,938 INFO L87 Difference]: Start difference. First operand 5327 states and 6817 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:11,565 INFO L93 Difference]: Finished difference Result 9247 states and 12083 transitions. [2022-11-03 01:41:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2022-11-03 01:41:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:11,591 INFO L225 Difference]: With dead ends: 9247 [2022-11-03 01:41:11,591 INFO L226 Difference]: Without dead ends: 5342 [2022-11-03 01:41:11,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:11,603 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 82 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:11,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 231 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5342 states. [2022-11-03 01:41:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5342 to 5273. [2022-11-03 01:41:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5273 states, 3941 states have (on average 1.2722659223547323) internal successors, (5014), 3956 states have internal predecessors, (5014), 792 states have call successors, (792), 532 states have call predecessors, (792), 539 states have return successors, (806), 785 states have call predecessors, (806), 790 states have call successors, (806) [2022-11-03 01:41:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 6612 transitions. [2022-11-03 01:41:12,234 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 6612 transitions. Word has length 101 [2022-11-03 01:41:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:12,235 INFO L495 AbstractCegarLoop]: Abstraction has 5273 states and 6612 transitions. [2022-11-03 01:41:12,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 6612 transitions. [2022-11-03 01:41:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 01:41:12,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:12,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:12,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:12,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:12,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1946339878, now seen corresponding path program 1 times [2022-11-03 01:41:12,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:12,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514913189] [2022-11-03 01:41:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:12,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:41:12,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514913189] [2022-11-03 01:41:12,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514913189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:12,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:12,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:41:12,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270227677] [2022-11-03 01:41:12,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:12,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:12,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:12,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:12,532 INFO L87 Difference]: Start difference. First operand 5273 states and 6612 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:13,156 INFO L93 Difference]: Finished difference Result 8960 states and 11444 transitions. [2022-11-03 01:41:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:41:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2022-11-03 01:41:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:13,198 INFO L225 Difference]: With dead ends: 8960 [2022-11-03 01:41:13,199 INFO L226 Difference]: Without dead ends: 5381 [2022-11-03 01:41:13,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:13,208 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 114 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:13,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 181 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:41:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2022-11-03 01:41:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 5381. [2022-11-03 01:41:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5381 states, 4040 states have (on average 1.253960396039604) internal successors, (5066), 4055 states have internal predecessors, (5066), 792 states have call successors, (792), 541 states have call predecessors, (792), 548 states have return successors, (806), 785 states have call predecessors, (806), 790 states have call successors, (806) [2022-11-03 01:41:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5381 states to 5381 states and 6664 transitions. [2022-11-03 01:41:13,810 INFO L78 Accepts]: Start accepts. Automaton has 5381 states and 6664 transitions. Word has length 101 [2022-11-03 01:41:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:13,810 INFO L495 AbstractCegarLoop]: Abstraction has 5381 states and 6664 transitions. [2022-11-03 01:41:13,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states and 6664 transitions. [2022-11-03 01:41:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 01:41:13,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:13,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:41:13,815 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1890018777, now seen corresponding path program 1 times [2022-11-03 01:41:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:13,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422200286] [2022-11-03 01:41:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:41:13,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422200286] [2022-11-03 01:41:13,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422200286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827113745] [2022-11-03 01:41:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:13,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:13,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:13,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:41:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:41:14,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:14,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827113745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:14,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:14,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 01:41:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936232198] [2022-11-03 01:41:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:14,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:14,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:14,034 INFO L87 Difference]: Start difference. First operand 5381 states and 6664 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:14,745 INFO L93 Difference]: Finished difference Result 9714 states and 12261 transitions. [2022-11-03 01:41:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:14,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2022-11-03 01:41:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:14,767 INFO L225 Difference]: With dead ends: 9714 [2022-11-03 01:41:14,767 INFO L226 Difference]: Without dead ends: 5380 [2022-11-03 01:41:14,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:14,780 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 80 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:14,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 254 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2022-11-03 01:41:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 5171. [2022-11-03 01:41:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 3871 states have (on average 1.216481529320589) internal successors, (4709), 3886 states have internal predecessors, (4709), 767 states have call successors, (767), 525 states have call predecessors, (767), 532 states have return successors, (781), 760 states have call predecessors, (781), 765 states have call successors, (781) [2022-11-03 01:41:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 6257 transitions. [2022-11-03 01:41:15,401 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 6257 transitions. Word has length 101 [2022-11-03 01:41:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:15,401 INFO L495 AbstractCegarLoop]: Abstraction has 5171 states and 6257 transitions. [2022-11-03 01:41:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 6257 transitions. [2022-11-03 01:41:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:41:15,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:15,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:15,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:15,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:41:15,632 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash -491911729, now seen corresponding path program 1 times [2022-11-03 01:41:15,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695860385] [2022-11-03 01:41:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:41:15,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695860385] [2022-11-03 01:41:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695860385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114743287] [2022-11-03 01:41:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:15,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:15,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:15,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:15,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:41:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:15,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:41:16,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:16,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114743287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:16,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:16,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-03 01:41:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996333733] [2022-11-03 01:41:16,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:16,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:16,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:16,053 INFO L87 Difference]: Start difference. First operand 5171 states and 6257 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:41:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:16,844 INFO L93 Difference]: Finished difference Result 10785 states and 13161 transitions. [2022-11-03 01:41:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:41:16,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2022-11-03 01:41:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:16,868 INFO L225 Difference]: With dead ends: 10785 [2022-11-03 01:41:16,868 INFO L226 Difference]: Without dead ends: 6678 [2022-11-03 01:41:16,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:16,879 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 146 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:16,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 232 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:41:16,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2022-11-03 01:41:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 6178. [2022-11-03 01:41:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6178 states, 4793 states have (on average 1.1838097225119966) internal successors, (5674), 4812 states have internal predecessors, (5674), 771 states have call successors, (771), 602 states have call predecessors, (771), 613 states have return successors, (865), 764 states have call predecessors, (865), 769 states have call successors, (865) [2022-11-03 01:41:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 7310 transitions. [2022-11-03 01:41:17,477 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 7310 transitions. Word has length 102 [2022-11-03 01:41:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:17,477 INFO L495 AbstractCegarLoop]: Abstraction has 6178 states and 7310 transitions. [2022-11-03 01:41:17,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:41:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 7310 transitions. [2022-11-03 01:41:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:41:17,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:17,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:17,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:17,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:41:17,696 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash -549055954, now seen corresponding path program 1 times [2022-11-03 01:41:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:17,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555912780] [2022-11-03 01:41:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:17,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:41:17,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:17,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555912780] [2022-11-03 01:41:17,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555912780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:17,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:17,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:41:17,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523972391] [2022-11-03 01:41:17,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:17,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:17,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:17,764 INFO L87 Difference]: Start difference. First operand 6178 states and 7310 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:18,781 INFO L93 Difference]: Finished difference Result 11050 states and 13366 transitions. [2022-11-03 01:41:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:41:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2022-11-03 01:41:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:18,802 INFO L225 Difference]: With dead ends: 11050 [2022-11-03 01:41:18,802 INFO L226 Difference]: Without dead ends: 6111 [2022-11-03 01:41:18,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:18,817 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 176 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:18,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 252 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:41:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2022-11-03 01:41:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 6087. [2022-11-03 01:41:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6087 states, 4706 states have (on average 1.1532086697832553) internal successors, (5427), 4724 states have internal predecessors, (5427), 769 states have call successors, (769), 600 states have call predecessors, (769), 611 states have return successors, (863), 763 states have call predecessors, (863), 767 states have call successors, (863) [2022-11-03 01:41:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 7059 transitions. [2022-11-03 01:41:19,740 INFO L78 Accepts]: Start accepts. Automaton has 6087 states and 7059 transitions. Word has length 102 [2022-11-03 01:41:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:19,741 INFO L495 AbstractCegarLoop]: Abstraction has 6087 states and 7059 transitions. [2022-11-03 01:41:19,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6087 states and 7059 transitions. [2022-11-03 01:41:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 01:41:19,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:19,746 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:19,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 01:41:19,746 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:19,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1287540837, now seen corresponding path program 1 times [2022-11-03 01:41:19,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:19,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146834618] [2022-11-03 01:41:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:19,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:41:20,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:20,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146834618] [2022-11-03 01:41:20,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146834618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:20,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:20,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:41:20,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002324547] [2022-11-03 01:41:20,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:20,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:20,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:41:20,040 INFO L87 Difference]: Start difference. First operand 6087 states and 7059 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:21,008 INFO L93 Difference]: Finished difference Result 12743 states and 14905 transitions. [2022-11-03 01:41:21,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:41:21,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-11-03 01:41:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:21,035 INFO L225 Difference]: With dead ends: 12743 [2022-11-03 01:41:21,036 INFO L226 Difference]: Without dead ends: 8042 [2022-11-03 01:41:21,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:21,049 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 76 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:21,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 365 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:41:21,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8042 states. [2022-11-03 01:41:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8042 to 7933. [2022-11-03 01:41:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7933 states, 6073 states have (on average 1.150502222954059) internal successors, (6987), 6064 states have internal predecessors, (6987), 1050 states have call successors, (1050), 814 states have call predecessors, (1050), 809 states have return successors, (1208), 1055 states have call predecessors, (1208), 1048 states have call successors, (1208) [2022-11-03 01:41:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7933 states to 7933 states and 9245 transitions. [2022-11-03 01:41:21,840 INFO L78 Accepts]: Start accepts. Automaton has 7933 states and 9245 transitions. Word has length 103 [2022-11-03 01:41:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:21,841 INFO L495 AbstractCegarLoop]: Abstraction has 7933 states and 9245 transitions. [2022-11-03 01:41:21,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 7933 states and 9245 transitions. [2022-11-03 01:41:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 01:41:21,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:21,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:21,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 01:41:21,847 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1260113909, now seen corresponding path program 1 times [2022-11-03 01:41:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:21,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895306397] [2022-11-03 01:41:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:41:22,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:22,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895306397] [2022-11-03 01:41:22,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895306397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189621968] [2022-11-03 01:41:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:22,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:22,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:22,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:22,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:41:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:22,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:41:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:22,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:22,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189621968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:22,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:22,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 01:41:22,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526174457] [2022-11-03 01:41:22,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:22,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:22,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:22,217 INFO L87 Difference]: Start difference. First operand 7933 states and 9245 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:41:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:23,559 INFO L93 Difference]: Finished difference Result 13256 states and 15389 transitions. [2022-11-03 01:41:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:41:23,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 103 [2022-11-03 01:41:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:23,583 INFO L225 Difference]: With dead ends: 13256 [2022-11-03 01:41:23,583 INFO L226 Difference]: Without dead ends: 7204 [2022-11-03 01:41:23,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:41:23,596 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 181 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:23,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 375 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:41:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7204 states. [2022-11-03 01:41:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7204 to 6774. [2022-11-03 01:41:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6774 states, 5206 states have (on average 1.1379177871686517) internal successors, (5924), 5199 states have internal predecessors, (5924), 880 states have call successors, (880), 692 states have call predecessors, (880), 687 states have return successors, (1006), 883 states have call predecessors, (1006), 878 states have call successors, (1006) [2022-11-03 01:41:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6774 states to 6774 states and 7810 transitions. [2022-11-03 01:41:24,405 INFO L78 Accepts]: Start accepts. Automaton has 6774 states and 7810 transitions. Word has length 103 [2022-11-03 01:41:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:24,405 INFO L495 AbstractCegarLoop]: Abstraction has 6774 states and 7810 transitions. [2022-11-03 01:41:24,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:41:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6774 states and 7810 transitions. [2022-11-03 01:41:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 01:41:24,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:24,411 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:24,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:24,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:41:24,628 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:24,628 INFO L85 PathProgramCache]: Analyzing trace with hash -448604415, now seen corresponding path program 1 times [2022-11-03 01:41:24,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:24,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169730819] [2022-11-03 01:41:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:24,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:41:25,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169730819] [2022-11-03 01:41:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169730819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024970636] [2022-11-03 01:41:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:25,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:25,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:25,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:25,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:41:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:25,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:41:25,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:41:25,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 01:41:25,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024970636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:25,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962468124] [2022-11-03 01:41:25,848 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-03 01:41:25,848 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:41:25,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:41:25,849 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:41:25,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:41:30,001 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 37 for LOIs [2022-11-03 01:41:30,005 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 106 for LOIs [2022-11-03 01:41:31,279 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 139 for LOIs [2022-11-03 01:41:33,305 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 115 for LOIs [2022-11-03 01:41:33,322 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 59 for LOIs [2022-11-03 01:41:33,331 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 41 for LOIs [2022-11-03 01:41:33,487 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 52 for LOIs [2022-11-03 01:41:33,587 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:41:46,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232471#(and (<= ~local~0 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (<= 0 (+ ~local~0 2147483648)) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:41:46,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:41:46,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:41:46,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 19 [2022-11-03 01:41:46,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655459586] [2022-11-03 01:41:46,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:46,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:41:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:46,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:41:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=3708, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 01:41:46,329 INFO L87 Difference]: Start difference. First operand 6774 states and 7810 transitions. Second operand has 19 states, 15 states have (on average 8.2) internal successors, (123), 17 states have internal predecessors, (123), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 01:41:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:49,297 INFO L93 Difference]: Finished difference Result 12092 states and 14191 transitions. [2022-11-03 01:41:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-03 01:41:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 8.2) internal successors, (123), 17 states have internal predecessors, (123), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 109 [2022-11-03 01:41:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:49,315 INFO L225 Difference]: With dead ends: 12092 [2022-11-03 01:41:49,315 INFO L226 Difference]: Without dead ends: 5326 [2022-11-03 01:41:49,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6355 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1281, Invalid=14721, Unknown=0, NotChecked=0, Total=16002 [2022-11-03 01:41:49,332 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 862 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:49,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 1765 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:41:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2022-11-03 01:41:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4252. [2022-11-03 01:41:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 3308 states have (on average 1.1399637243047158) internal successors, (3771), 3317 states have internal predecessors, (3771), 504 states have call successors, (504), 429 states have call predecessors, (504), 439 states have return successors, (582), 505 states have call predecessors, (582), 502 states have call successors, (582) [2022-11-03 01:41:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 4857 transitions. [2022-11-03 01:41:49,890 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 4857 transitions. Word has length 109 [2022-11-03 01:41:49,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:49,890 INFO L495 AbstractCegarLoop]: Abstraction has 4252 states and 4857 transitions. [2022-11-03 01:41:49,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 8.2) internal successors, (123), 17 states have internal predecessors, (123), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 01:41:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 4857 transitions. [2022-11-03 01:41:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 01:41:49,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:49,894 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:49,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:50,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:41:50,108 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:50,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1805233249, now seen corresponding path program 1 times [2022-11-03 01:41:50,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:50,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556719043] [2022-11-03 01:41:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:50,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:41:50,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556719043] [2022-11-03 01:41:50,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556719043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296335814] [2022-11-03 01:41:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:50,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:50,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:50,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:41:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:41:50,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:41:51,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 01:41:51,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296335814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:51,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249777812] [2022-11-03 01:41:51,240 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-03 01:41:51,241 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:41:51,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:41:51,241 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:41:51,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:41:54,323 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 38 for LOIs [2022-11-03 01:41:54,326 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 106 for LOIs [2022-11-03 01:41:57,208 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 139 for LOIs [2022-11-03 01:41:57,489 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 115 for LOIs [2022-11-03 01:41:57,506 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 52 for LOIs [2022-11-03 01:41:57,514 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 42 for LOIs [2022-11-03 01:41:57,558 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 52 for LOIs [2022-11-03 01:41:57,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:08,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '256421#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (<= 0 (+ ~local~0 2147483648)) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:08,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:08,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:08,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 21 [2022-11-03 01:42:08,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017537254] [2022-11-03 01:42:08,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:08,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:42:08,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:08,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:42:08,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=4343, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 01:42:08,099 INFO L87 Difference]: Start difference. First operand 4252 states and 4857 transitions. Second operand has 21 states, 17 states have (on average 7.764705882352941) internal successors, (132), 19 states have internal predecessors, (132), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 01:42:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:10,796 INFO L93 Difference]: Finished difference Result 7820 states and 9022 transitions. [2022-11-03 01:42:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-03 01:42:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 7.764705882352941) internal successors, (132), 19 states have internal predecessors, (132), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 112 [2022-11-03 01:42:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:10,807 INFO L225 Difference]: With dead ends: 7820 [2022-11-03 01:42:10,807 INFO L226 Difference]: Without dead ends: 3708 [2022-11-03 01:42:10,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 305 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6445 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1204, Invalid=14546, Unknown=0, NotChecked=0, Total=15750 [2022-11-03 01:42:10,819 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 443 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:10,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1875 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:42:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2022-11-03 01:42:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3124. [2022-11-03 01:42:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 2447 states have (on average 1.1397629750715161) internal successors, (2789), 2459 states have internal predecessors, (2789), 354 states have call successors, (354), 309 states have call predecessors, (354), 322 states have return successors, (417), 355 states have call predecessors, (417), 352 states have call successors, (417) [2022-11-03 01:42:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 3560 transitions. [2022-11-03 01:42:11,234 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 3560 transitions. Word has length 112 [2022-11-03 01:42:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:11,235 INFO L495 AbstractCegarLoop]: Abstraction has 3124 states and 3560 transitions. [2022-11-03 01:42:11,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 7.764705882352941) internal successors, (132), 19 states have internal predecessors, (132), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 01:42:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 3560 transitions. [2022-11-03 01:42:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:42:11,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:11,238 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:11,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:11,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:42:11,460 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash -794825886, now seen corresponding path program 1 times [2022-11-03 01:42:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:11,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209613129] [2022-11-03 01:42:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:11,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:42:12,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209613129] [2022-11-03 01:42:12,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209613129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948233078] [2022-11-03 01:42:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:12,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:12,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:12,192 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:12,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:42:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:12,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 01:42:12,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:42:12,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:42:13,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948233078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:13,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232486190] [2022-11-03 01:42:13,649 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 01:42:13,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:13,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:13,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:13,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:18,403 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 39 for LOIs [2022-11-03 01:42:18,407 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 52 for LOIs [2022-11-03 01:42:18,421 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 71 for LOIs [2022-11-03 01:42:18,436 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 59 for LOIs [2022-11-03 01:42:18,443 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 34 for LOIs [2022-11-03 01:42:18,447 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 58 for LOIs [2022-11-03 01:42:18,538 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 52 for LOIs [2022-11-03 01:42:18,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:29,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '272594#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (= ~t2_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:29,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:29,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:29,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 14] total 37 [2022-11-03 01:42:29,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233345826] [2022-11-03 01:42:29,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:29,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 01:42:29,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:29,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 01:42:29,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=7053, Unknown=0, NotChecked=0, Total=7656 [2022-11-03 01:42:29,819 INFO L87 Difference]: Start difference. First operand 3124 states and 3560 transitions. Second operand has 37 states, 25 states have (on average 7.36) internal successors, (184), 29 states have internal predecessors, (184), 16 states have call successors, (44), 11 states have call predecessors, (44), 19 states have return successors, (44), 16 states have call predecessors, (44), 16 states have call successors, (44) [2022-11-03 01:42:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:35,485 INFO L93 Difference]: Finished difference Result 7321 states and 8429 transitions. [2022-11-03 01:42:35,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-03 01:42:35,486 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 25 states have (on average 7.36) internal successors, (184), 29 states have internal predecessors, (184), 16 states have call successors, (44), 11 states have call predecessors, (44), 19 states have return successors, (44), 16 states have call predecessors, (44), 16 states have call successors, (44) Word has length 115 [2022-11-03 01:42:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:35,500 INFO L225 Difference]: With dead ends: 7321 [2022-11-03 01:42:35,500 INFO L226 Difference]: Without dead ends: 4897 [2022-11-03 01:42:35,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 271 SyntacticMatches, 23 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10168 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=2587, Invalid=20063, Unknown=0, NotChecked=0, Total=22650 [2022-11-03 01:42:35,509 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 2126 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 1091 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2132 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1091 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:35,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2132 Valid, 1071 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1091 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 01:42:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4897 states. [2022-11-03 01:42:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4897 to 2772. [2022-11-03 01:42:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2154 states have (on average 1.1323119777158774) internal successors, (2439), 2178 states have internal predecessors, (2439), 323 states have call successors, (323), 277 states have call predecessors, (323), 294 states have return successors, (355), 316 states have call predecessors, (355), 321 states have call successors, (355) [2022-11-03 01:42:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3117 transitions. [2022-11-03 01:42:35,951 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3117 transitions. Word has length 115 [2022-11-03 01:42:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:35,952 INFO L495 AbstractCegarLoop]: Abstraction has 2772 states and 3117 transitions. [2022-11-03 01:42:35,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 25 states have (on average 7.36) internal successors, (184), 29 states have internal predecessors, (184), 16 states have call successors, (44), 11 states have call predecessors, (44), 19 states have return successors, (44), 16 states have call predecessors, (44), 16 states have call successors, (44) [2022-11-03 01:42:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3117 transitions. [2022-11-03 01:42:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 01:42:35,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:35,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:35,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:36,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -281052083, now seen corresponding path program 1 times [2022-11-03 01:42:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:36,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609885001] [2022-11-03 01:42:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 01:42:36,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609885001] [2022-11-03 01:42:36,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609885001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:36,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:36,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:36,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493883995] [2022-11-03 01:42:36,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:36,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:36,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:36,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:36,371 INFO L87 Difference]: Start difference. First operand 2772 states and 3117 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:42:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:37,278 INFO L93 Difference]: Finished difference Result 4639 states and 5228 transitions. [2022-11-03 01:42:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 127 [2022-11-03 01:42:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:37,290 INFO L225 Difference]: With dead ends: 4639 [2022-11-03 01:42:37,290 INFO L226 Difference]: Without dead ends: 4636 [2022-11-03 01:42:37,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:37,292 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 237 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:37,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 573 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:42:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2022-11-03 01:42:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 2842. [2022-11-03 01:42:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2205 states have (on average 1.1283446712018141) internal successors, (2488), 2228 states have internal predecessors, (2488), 333 states have call successors, (333), 284 states have call predecessors, (333), 303 states have return successors, (361), 329 states have call predecessors, (361), 331 states have call successors, (361) [2022-11-03 01:42:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3182 transitions. [2022-11-03 01:42:37,757 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3182 transitions. Word has length 127 [2022-11-03 01:42:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:37,757 INFO L495 AbstractCegarLoop]: Abstraction has 2842 states and 3182 transitions. [2022-11-03 01:42:37,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:42:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3182 transitions. [2022-11-03 01:42:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 01:42:37,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:37,760 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:37,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 01:42:37,760 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1648965688, now seen corresponding path program 1 times [2022-11-03 01:42:37,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:37,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679313237] [2022-11-03 01:42:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:37,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:42:37,784 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:42:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:42:37,861 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:42:37,861 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:42:37,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:42:37,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 01:42:37,867 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:37,871 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:42:37,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:42:37 BoogieIcfgContainer [2022-11-03 01:42:37,986 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:42:37,987 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:42:37,987 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:42:37,987 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:42:37,987 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:40" (3/4) ... [2022-11-03 01:42:37,989 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 01:42:38,135 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 01:42:38,135 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:42:38,136 INFO L158 Benchmark]: Toolchain (without parser) took 118905.80ms. Allocated memory was 115.3MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 73.1MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 572.6MB. Max. memory is 16.1GB. [2022-11-03 01:42:38,136 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:42:38,137 INFO L158 Benchmark]: CACSL2BoogieTranslator took 439.99ms. Allocated memory is still 115.3MB. Free memory was 72.9MB in the beginning and 88.2MB in the end (delta: -15.4MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2022-11-03 01:42:38,137 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.68ms. Allocated memory is still 115.3MB. Free memory was 88.2MB in the beginning and 86.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:42:38,137 INFO L158 Benchmark]: Boogie Preprocessor took 42.52ms. Allocated memory is still 115.3MB. Free memory was 86.1MB in the beginning and 84.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:42:38,138 INFO L158 Benchmark]: RCFGBuilder took 833.43ms. Allocated memory is still 115.3MB. Free memory was 84.5MB in the beginning and 45.4MB in the end (delta: 39.1MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-11-03 01:42:38,138 INFO L158 Benchmark]: TraceAbstraction took 117363.30ms. Allocated memory was 115.3MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 45.0MB in the beginning and 1.8GB in the end (delta: -1.8GB). Peak memory consumption was 534.6MB. Max. memory is 16.1GB. [2022-11-03 01:42:38,138 INFO L158 Benchmark]: Witness Printer took 148.82ms. Allocated memory is still 2.4GB. Free memory was 1.8GB in the beginning and 1.8GB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 01:42:38,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 439.99ms. Allocated memory is still 115.3MB. Free memory was 72.9MB in the beginning and 88.2MB in the end (delta: -15.4MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.68ms. Allocated memory is still 115.3MB. Free memory was 88.2MB in the beginning and 86.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.52ms. Allocated memory is still 115.3MB. Free memory was 86.1MB in the beginning and 84.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 833.43ms. Allocated memory is still 115.3MB. Free memory was 84.5MB in the beginning and 45.4MB in the end (delta: 39.1MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * TraceAbstraction took 117363.30ms. Allocated memory was 115.3MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 45.0MB in the beginning and 1.8GB in the end (delta: -1.8GB). Peak memory consumption was 534.6MB. Max. memory is 16.1GB. * Witness Printer took 148.82ms. Allocated memory is still 2.4GB. Free memory was 1.8GB in the beginning and 1.8GB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. 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: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int m_pc = 0; [L25] int t1_pc = 0; [L26] int t2_pc = 0; [L27] int m_st ; [L28] int t1_st ; [L29] int t2_st ; [L30] int m_i ; [L31] int t1_i ; [L32] int t2_i ; [L33] int M_E = 2; [L34] int T1_E = 2; [L35] int T2_E = 2; [L36] int E_M = 2; [L37] int E_1 = 2; [L38] int E_2 = 2; [L43] int token ; [L45] int local ; [L610] int __retres1 ; [L614] CALL init_model() [L524] m_i = 1 [L525] t1_i = 1 [L526] t2_i = 1 [L614] RET init_model() [L615] CALL start_simulation() [L551] int kernel_st ; [L552] int tmp ; [L553] int tmp___0 ; [L557] kernel_st = 0 VAL [E_1=2, E_2=2, E_M=2, kernel_st=0, local=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, token=0] [L558] FCALL update_channels() VAL [E_1=2, E_2=2, E_M=2, kernel_st=0, local=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, token=0] [L559] CALL init_threads() [L243] COND TRUE m_i == 1 [L244] m_st = 0 [L248] COND TRUE t1_i == 1 [L249] t1_st = 0 [L253] COND TRUE t2_i == 1 [L254] t2_st = 0 [L559] RET init_threads() [L560] CALL fire_delta_events() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, E_1=2, E_2=2, E_M=2, local=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, token=0] [L356] COND FALSE !(M_E == 0) [L361] COND FALSE !(T1_E == 0) [L366] COND FALSE !(T2_E == 0) [L371] COND FALSE !(E_M == 0) [L376] COND FALSE !(E_1 == 0) [L381] COND FALSE !(E_2 == 0) [L560] RET fire_delta_events() VAL [E_1=2, E_2=2, E_M=2, kernel_st=0, local=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, token=0] [L561] CALL activate_threads() VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L429] int tmp ; [L430] int tmp___0 ; [L431] int tmp___1 ; [L435] CALL, EXPR is_master_triggered() [L175] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L178] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L188] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L190] return (__retres1); [L435] RET, EXPR is_master_triggered() [L435] tmp = is_master_triggered() [L437] COND FALSE !(\read(tmp)) [L443] CALL, EXPR is_transmit1_triggered() [L194] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L197] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L207] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L209] return (__retres1); [L443] RET, EXPR is_transmit1_triggered() [L443] tmp___0 = is_transmit1_triggered() [L445] COND FALSE !(\read(tmp___0)) [L451] CALL, EXPR is_transmit2_triggered() [L213] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L216] COND FALSE !(t2_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L226] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, E_1=2, E_2=2, E_M=2, local=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, token=0] [L228] return (__retres1); [L451] RET, EXPR is_transmit2_triggered() [L451] tmp___1 = is_transmit2_triggered() [L453] COND FALSE !(\read(tmp___1)) [L561] RET activate_threads() VAL [E_1=2, E_2=2, E_M=2, kernel_st=0, local=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, token=0] [L562] CALL reset_delta_events() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, E_1=2, E_2=2, E_M=2, local=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, token=0] [L394] COND FALSE !(M_E == 1) [L399] COND FALSE !(T1_E == 1) [L404] COND FALSE !(T2_E == 1) [L409] COND FALSE !(E_M == 1) [L414] COND FALSE !(E_1 == 1) [L419] COND FALSE !(E_2 == 1) [L562] RET reset_delta_events() VAL [E_1=2, E_2=2, E_M=2, kernel_st=0, local=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, token=0] [L565] COND TRUE 1 [L568] kernel_st = 1 [L569] CALL eval() [L289] int tmp ; VAL [E_1=2, E_2=2, E_M=2, local=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, token=0] [L293] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, local=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, token=0] [L296] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_M=2, local=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, token=0] [L263] int __retres1 ; [L266] COND TRUE m_st == 0 [L267] __retres1 = 1 [L284] return (__retres1); [L296] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_M=2, exists_runnable_thread()=1, local=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, token=0] [L296] tmp = exists_runnable_thread() [L298] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=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, tmp=1, token=0] [L303] COND TRUE m_st == 0 [L304] int tmp_ndt_1; [L305] tmp_ndt_1 = __VERIFIER_nondet_int() [L306] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_M=2, local=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, tmp=1, tmp_ndt_1=0, token=0] [L317] COND TRUE t1_st == 0 [L318] int tmp_ndt_2; [L319] tmp_ndt_2 = __VERIFIER_nondet_int() [L320] COND TRUE \read(tmp_ndt_2) [L322] t1_st = 1 [L323] CALL transmit1() [L106] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, 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, token=0] [L117] COND TRUE 1 [L119] t1_pc = 1 [L120] t1_st = 2 [L323] RET transmit1() [L331] COND TRUE t2_st == 0 [L332] int tmp_ndt_3; [L333] tmp_ndt_3 = __VERIFIER_nondet_int() [L334] COND TRUE \read(tmp_ndt_3) [L336] t2_st = 1 [L337] CALL transmit2() [L142] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, 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, token=0] [L153] COND TRUE 1 [L155] t2_pc = 1 [L156] t2_st = 2 [L337] RET transmit2() [L293] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, local=0, 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, token=0] [L296] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_M=2, local=0, 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, token=0] [L263] int __retres1 ; [L266] COND TRUE m_st == 0 [L267] __retres1 = 1 [L284] return (__retres1); [L296] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_M=2, exists_runnable_thread()=1, local=0, 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, token=0] [L296] tmp = exists_runnable_thread() [L298] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=0, 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, token=0] [L303] COND TRUE m_st == 0 [L304] int tmp_ndt_1; [L305] tmp_ndt_1 = __VERIFIER_nondet_int() [L306] COND TRUE \read(tmp_ndt_1) [L308] m_st = 1 [L309] CALL master() [L48] int tmp_var = __VERIFIER_nondet_int(); [L50] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, 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, tmp_var=0, token=0] [L61] COND TRUE 1 [L64] token = __VERIFIER_nondet_int() [L65] local = token [L66] E_1 = 1 VAL [E_1=1, E_2=2, E_M=2, local=0, 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, tmp_var=0, token=0] [L67] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L467] CALL activate_threads() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L429] int tmp ; [L430] int tmp___0 ; [L431] int tmp___1 ; [L435] CALL, EXPR is_master_triggered() [L175] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L178] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L188] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L190] return (__retres1); [L435] RET, EXPR is_master_triggered() [L435] tmp = is_master_triggered() [L437] COND FALSE !(\read(tmp)) [L443] CALL, EXPR is_transmit1_triggered() [L194] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L197] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L198] COND TRUE E_1 == 1 [L199] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=1, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L209] return (__retres1); [L443] RET, EXPR is_transmit1_triggered() [L443] tmp___0 = is_transmit1_triggered() [L445] COND TRUE \read(tmp___0) [L446] t1_st = 0 [L451] CALL, EXPR is_transmit2_triggered() [L213] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L216] COND TRUE t2_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L217] COND FALSE !(E_2 == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L226] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L228] return (__retres1); [L451] RET, EXPR is_transmit2_triggered() [L451] tmp___1 = is_transmit2_triggered() [L453] COND FALSE !(\read(tmp___1)) [L467] RET activate_threads() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, E_1=1, E_2=2, E_M=2, local=0, 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, token=0] [L67] RET immediate_notify() VAL [E_1=1, E_2=2, E_M=2, local=0, 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, tmp_var=0, token=0] [L68] E_1 = 2 [L69] m_pc = 1 [L70] m_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, 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, tmp_var=0, token=0] [L309] RET master() [L317] COND TRUE t1_st == 0 [L318] int tmp_ndt_2; [L319] tmp_ndt_2 = __VERIFIER_nondet_int() [L320] COND TRUE \read(tmp_ndt_2) [L322] t1_st = 1 [L323] CALL transmit1() [L106] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, 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, token=0] [L109] COND TRUE t1_pc == 1 [L125] token += 1 [L126] E_2 = 1 VAL [E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L127] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L467] CALL activate_threads() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L429] int tmp ; [L430] int tmp___0 ; [L431] int tmp___1 ; [L435] CALL, EXPR is_master_triggered() [L175] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L178] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L179] COND FALSE !(E_M == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L188] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L190] return (__retres1); [L435] RET, EXPR is_master_triggered() [L435] tmp = is_master_triggered() [L437] COND FALSE !(\read(tmp)) [L443] CALL, EXPR is_transmit1_triggered() [L194] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L197] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L198] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L207] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L209] return (__retres1); [L443] RET, EXPR is_transmit1_triggered() [L443] tmp___0 = is_transmit1_triggered() [L445] COND FALSE !(\read(tmp___0)) [L451] CALL, EXPR is_transmit2_triggered() [L213] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L216] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L217] COND TRUE E_2 == 1 [L218] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=1, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L228] return (__retres1); [L451] RET, EXPR is_transmit2_triggered() [L451] tmp___1 = is_transmit2_triggered() [L453] COND TRUE \read(tmp___1) [L454] t2_st = 0 [L467] RET activate_threads() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L127] RET immediate_notify() VAL [E_1=2, E_2=1, E_M=2, local=0, 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, token=1] [L128] E_2 = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, 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, token=1] [L117] COND TRUE 1 [L119] t1_pc = 1 [L120] t1_st = 2 [L323] RET transmit1() [L331] COND TRUE t2_st == 0 [L332] int tmp_ndt_3; [L333] tmp_ndt_3 = __VERIFIER_nondet_int() [L334] COND TRUE \read(tmp_ndt_3) [L336] t2_st = 1 [L337] CALL transmit2() [L142] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, 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, token=1] [L145] COND TRUE t2_pc == 1 [L161] token += 1 [L162] E_M = 1 VAL [E_1=2, E_2=2, E_M=1, local=0, 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, token=2] [L163] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, 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, token=2] [L467] CALL activate_threads() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, 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, token=2] [L429] int tmp ; [L430] int tmp___0 ; [L431] int tmp___1 ; [L435] CALL, EXPR is_master_triggered() [L175] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, 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, token=2] [L178] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, 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, token=2] [L179] COND TRUE E_M == 1 [L180] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=1, E_1=2, E_2=2, E_M=1, local=0, 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, token=2] [L190] return (__retres1); [L435] RET, EXPR is_master_triggered() [L435] tmp = is_master_triggered() [L437] COND TRUE \read(tmp) [L438] m_st = 0 [L443] CALL, EXPR is_transmit1_triggered() [L194] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L197] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L198] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L207] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L209] return (__retres1); [L443] RET, EXPR is_transmit1_triggered() [L443] tmp___0 = is_transmit1_triggered() [L445] COND FALSE !(\read(tmp___0)) [L451] CALL, EXPR is_transmit2_triggered() [L213] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L216] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L217] COND FALSE !(E_2 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L226] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L228] return (__retres1); [L451] RET, EXPR is_transmit2_triggered() [L451] tmp___1 = is_transmit2_triggered() [L453] COND FALSE !(\read(tmp___1)) [L467] RET activate_threads() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L163] RET immediate_notify() VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L164] E_M = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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=1, token=2] [L153] COND TRUE 1 [L155] t2_pc = 1 [L156] t2_st = 2 [L337] RET transmit2() [L293] COND TRUE 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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=1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L296] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, token=2] [L263] int __retres1 ; [L266] COND TRUE m_st == 0 [L267] __retres1 = 1 [L284] return (__retres1); [L296] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_M=2, exists_runnable_thread()=1, local=0, M_E=2, m_i=1, m_pc=1, 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=1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L296] tmp = exists_runnable_thread() [L298] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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=1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L303] COND TRUE m_st == 0 [L304] int tmp_ndt_1; [L305] tmp_ndt_1 = __VERIFIER_nondet_int() [L306] COND TRUE \read(tmp_ndt_1) [L308] m_st = 1 [L309] CALL master() [L48] int tmp_var = __VERIFIER_nondet_int(); [L50] COND FALSE !(m_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, tmp_var=5, token=2] [L53] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, tmp_var=5, token=2] [L75] COND FALSE !(token != local + 2) [L80] COND TRUE tmp_var <= 5 [L81] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, tmp_var=5, token=2] [L86] COND TRUE tmp_var <= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, tmp_var=5, token=2] [L87] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, tmp_var=5, token=2] [L88] COND TRUE tmp_var == 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, tmp_var=5, token=2] [L89] CALL error() VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, token=2] [L20] reach_error() VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, 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, token=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 117.1s, OverallIterations: 21, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 27.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7440 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7381 mSDsluCounter, 10380 SdHoareTripleChecker+Invalid, 7.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8458 mSDsCounter, 3177 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10949 IncrementalHoareTripleChecker+Invalid, 14126 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3177 mSolverCounterUnsat, 3092 mSDtfsCounter, 10949 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2524 GetRequests, 1897 SyntacticMatches, 35 SemanticMatches, 592 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30015 ImplicationChecksByTransitivity, 51.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7933occurred in iteration=15, InterpolantAutomatonStates: 348, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.7s AutomataMinimizationTime, 20 MinimizatonAttempts, 9752 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 3110 NumberOfCodeBlocks, 3095 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 3382 ConstructedInterpolants, 0 QuantifiedInterpolants, 7616 SizeOfPredicates, 17 NumberOfNonLiveVariables, 4985 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 35 InterpolantComputations, 16 PerfectInterpolantSequences, 1849/2047 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-03 01:42:38,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395ded7f-706e-4093-acd2-fb04e7dbd178/bin/utaipan-7li7fVZpFI/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