./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:01:20,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:01:20,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:01:20,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:01:20,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:01:20,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:01:20,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:01:20,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:01:20,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:01:20,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:01:20,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:01:20,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:01:20,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:01:20,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:01:20,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:01:20,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:01:20,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:01:20,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:01:20,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:01:20,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:01:20,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:01:20,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:01:20,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:01:20,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:01:20,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:01:20,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:01:20,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:01:20,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:01:20,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:01:20,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:01:20,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:01:20,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:01:20,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:01:20,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:01:20,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:01:20,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:01:20,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:01:20,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:01:20,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:01:20,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:01:20,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:01:20,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:01:20,987 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:01:20,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:01:20,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:01:20,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:01:20,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:01:20,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:01:20,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:01:20,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:01:20,990 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:01:20,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:01:20,991 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:01:20,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:01:20,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:01:20,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:01:20,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:01:20,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:01:20,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:01:20,993 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:01:20,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:01:20,994 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:01:20,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:01:20,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:01:20,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:01:20,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:01:20,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:01:20,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:01:20,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:01:20,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:01:20,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:01:20,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:01:20,997 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:01:20,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:01:20,997 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:01:20,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:01:20,998 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d [2022-11-23 03:01:21,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:01:21,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:01:21,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:01:21,321 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:01:21,321 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:01:21,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2022-11-23 03:01:24,445 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:01:24,746 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:01:24,746 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2022-11-23 03:01:24,760 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/data/30c7c1a03/2834c9d86d55488a840166c3c2e51db0/FLAGf927db67a [2022-11-23 03:01:24,774 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/data/30c7c1a03/2834c9d86d55488a840166c3c2e51db0 [2022-11-23 03:01:24,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:01:24,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:01:24,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:01:24,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:01:24,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:01:24,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:01:24" (1/1) ... [2022-11-23 03:01:24,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502441f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:24, skipping insertion in model container [2022-11-23 03:01:24,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:01:24" (1/1) ... [2022-11-23 03:01:24,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:01:24,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:01:25,019 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2022-11-23 03:01:25,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:01:25,047 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:01:25,080 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2022-11-23 03:01:25,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:01:25,104 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:01:25,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25 WrapperNode [2022-11-23 03:01:25,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:01:25,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:01:25,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:01:25,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:01:25,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,161 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 388 [2022-11-23 03:01:25,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:01:25,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:01:25,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:01:25,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:01:25,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:01:25,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:01:25,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:01:25,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:01:25,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (1/1) ... [2022-11-23 03:01:25,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:01:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:01:25,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:01:25,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:01:25,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:01:25,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:01:25,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:01:25,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:01:25,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:01:25,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:01:25,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:01:25,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:01:25,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:01:25,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:01:25,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:01:25,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:01:25,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:01:25,308 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:01:25,430 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:01:25,432 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:01:26,102 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:01:26,128 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:01:26,129 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:01:26,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:01:26 BoogieIcfgContainer [2022-11-23 03:01:26,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:01:26,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:01:26,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:01:26,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:01:26,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:01:24" (1/3) ... [2022-11-23 03:01:26,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660e971e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:01:26, skipping insertion in model container [2022-11-23 03:01:26,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:25" (2/3) ... [2022-11-23 03:01:26,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660e971e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:01:26, skipping insertion in model container [2022-11-23 03:01:26,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:01:26" (3/3) ... [2022-11-23 03:01:26,141 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2022-11-23 03:01:26,150 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:01:26,160 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:01:26,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:01:26,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:01:26,437 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:01:26,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 474 places, 516 transitions, 1048 flow [2022-11-23 03:01:26,822 INFO L130 PetriNetUnfolder]: 49/514 cut-off events. [2022-11-23 03:01:26,822 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:01:26,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 514 events. 49/514 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1536 event pairs, 0 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 353. Up to 2 conditions per place. [2022-11-23 03:01:26,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 474 places, 516 transitions, 1048 flow [2022-11-23 03:01:26,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 463 places, 505 transitions, 1022 flow [2022-11-23 03:01:26,863 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:01:26,888 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 463 places, 505 transitions, 1022 flow [2022-11-23 03:01:26,891 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 463 places, 505 transitions, 1022 flow [2022-11-23 03:01:26,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 505 transitions, 1022 flow [2022-11-23 03:01:27,042 INFO L130 PetriNetUnfolder]: 49/505 cut-off events. [2022-11-23 03:01:27,043 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:01:27,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 505 events. 49/505 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1519 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 353. Up to 2 conditions per place. [2022-11-23 03:01:27,081 INFO L119 LiptonReduction]: Number of co-enabled transitions 63612 [2022-11-23 03:01:54,150 INFO L134 LiptonReduction]: Checked pairs total: 57657 [2022-11-23 03:01:54,150 INFO L136 LiptonReduction]: Total number of compositions: 644 [2022-11-23 03:01:54,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:01:54,172 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=PETRI_NET, 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;@4469907c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:01:54,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 03:01:54,181 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2022-11-23 03:01:54,181 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:01:54,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:01:54,182 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:01:54,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:01:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:01:54,188 INFO L85 PathProgramCache]: Analyzing trace with hash 39995916, now seen corresponding path program 1 times [2022-11-23 03:01:54,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:01:54,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995972014] [2022-11-23 03:01:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:01:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:01:54,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:01:54,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995972014] [2022-11-23 03:01:54,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995972014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:01:54,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:01:54,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:01:54,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699142560] [2022-11-23 03:01:54,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:01:54,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:01:54,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:01:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:01:54,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:01:54,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 478 out of 1160 [2022-11-23 03:01:54,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 482.3333333333333) internal successors, (1447), 3 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:54,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:01:54,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 478 of 1160 [2022-11-23 03:01:54,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:01:54,992 INFO L130 PetriNetUnfolder]: 157/250 cut-off events. [2022-11-23 03:01:54,992 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-23 03:01:54,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 250 events. 157/250 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 640 event pairs, 87 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 472. Up to 249 conditions per place. [2022-11-23 03:01:54,995 INFO L137 encePairwiseOnDemand]: 1155/1160 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2022-11-23 03:01:54,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 136 flow [2022-11-23 03:01:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:01:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:01:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1467 transitions. [2022-11-23 03:01:55,018 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.421551724137931 [2022-11-23 03:01:55,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1467 transitions. [2022-11-23 03:01:55,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1467 transitions. [2022-11-23 03:01:55,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:01:55,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1467 transitions. [2022-11-23 03:01:55,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 489.0) internal successors, (1467), 3 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:55,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1160.0) internal successors, (4640), 4 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:55,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1160.0) internal successors, (4640), 4 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:55,051 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 70 flow. Second operand 3 states and 1467 transitions. [2022-11-23 03:01:55,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 136 flow [2022-11-23 03:01:55,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:01:55,058 INFO L231 Difference]: Finished difference. Result has 28 places, 31 transitions, 84 flow [2022-11-23 03:01:55,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=31} [2022-11-23 03:01:55,063 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2022-11-23 03:01:55,064 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 31 transitions, 84 flow [2022-11-23 03:01:55,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 482.3333333333333) internal successors, (1447), 3 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:55,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:01:55,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:01:55,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:01:55,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:01:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:01:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -742879611, now seen corresponding path program 1 times [2022-11-23 03:01:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:01:55,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342289423] [2022-11-23 03:01:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:01:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:01:55,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:01:55,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342289423] [2022-11-23 03:01:55,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342289423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:01:55,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388245774] [2022-11-23 03:01:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:55,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:55,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:01:55,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:01:55,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:01:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:01:55,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:01:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:01:55,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:01:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:01:55,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388245774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:01:55,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:01:55,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-23 03:01:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901278239] [2022-11-23 03:01:55,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:01:55,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:01:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:01:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:01:55,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:01:55,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 1160 [2022-11-23 03:01:55,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 476.625) internal successors, (3813), 8 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:55,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:01:55,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 1160 [2022-11-23 03:01:55,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:01:55,996 INFO L130 PetriNetUnfolder]: 157/256 cut-off events. [2022-11-23 03:01:55,996 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:01:55,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 256 events. 157/256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 640 event pairs, 87 based on Foata normal form. 3/190 useless extension candidates. Maximal degree in co-relation 512. Up to 249 conditions per place. [2022-11-23 03:01:55,998 INFO L137 encePairwiseOnDemand]: 1155/1160 looper letters, 27 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2022-11-23 03:01:55,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 182 flow [2022-11-23 03:01:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:01:56,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:01:56,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2887 transitions. [2022-11-23 03:01:56,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41479885057471266 [2022-11-23 03:01:56,009 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2887 transitions. [2022-11-23 03:01:56,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2887 transitions. [2022-11-23 03:01:56,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:01:56,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2887 transitions. [2022-11-23 03:01:56,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 481.1666666666667) internal successors, (2887), 6 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:56,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1160.0) internal successors, (8120), 7 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:56,036 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1160.0) internal successors, (8120), 7 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:56,037 INFO L175 Difference]: Start difference. First operand has 28 places, 31 transitions, 84 flow. Second operand 6 states and 2887 transitions. [2022-11-23 03:01:56,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 182 flow [2022-11-23 03:01:56,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:01:56,039 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 146 flow [2022-11-23 03:01:56,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2022-11-23 03:01:56,041 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2022-11-23 03:01:56,042 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 146 flow [2022-11-23 03:01:56,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 476.625) internal successors, (3813), 8 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:56,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:01:56,045 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:01:56,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:01:56,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:56,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:01:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:01:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1927941518, now seen corresponding path program 2 times [2022-11-23 03:01:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:01:56,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663700675] [2022-11-23 03:01:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:56,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:01:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:01:56,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:01:56,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663700675] [2022-11-23 03:01:56,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663700675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:01:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169483256] [2022-11-23 03:01:56,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:01:56,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:01:56,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:01:56,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:01:56,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:01:56,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:01:56,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:01:56,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:01:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 03:01:57,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:01:57,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169483256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:01:57,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:01:57,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-11-23 03:01:57,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532368955] [2022-11-23 03:01:57,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:01:57,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:01:57,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:01:57,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:01:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:01:57,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 464 out of 1160 [2022-11-23 03:01:57,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 467.75) internal successors, (1871), 4 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:57,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:01:57,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 464 of 1160 [2022-11-23 03:01:57,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:01:57,817 INFO L130 PetriNetUnfolder]: 165/285 cut-off events. [2022-11-23 03:01:57,817 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:01:57,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 285 events. 165/285 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 856 event pairs, 87 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 562. Up to 249 conditions per place. [2022-11-23 03:01:57,819 INFO L137 encePairwiseOnDemand]: 1156/1160 looper letters, 43 selfloop transitions, 1 changer transitions 7/51 dead transitions. [2022-11-23 03:01:57,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 51 transitions, 281 flow [2022-11-23 03:01:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:01:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:01:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1901 transitions. [2022-11-23 03:01:57,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.409698275862069 [2022-11-23 03:01:57,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1901 transitions. [2022-11-23 03:01:57,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1901 transitions. [2022-11-23 03:01:57,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:01:57,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1901 transitions. [2022-11-23 03:01:57,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 475.25) internal successors, (1901), 4 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:57,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1160.0) internal successors, (5800), 5 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:57,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1160.0) internal successors, (5800), 5 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:57,842 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 146 flow. Second operand 4 states and 1901 transitions. [2022-11-23 03:01:57,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 51 transitions, 281 flow [2022-11-23 03:01:57,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 265 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 03:01:57,845 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 139 flow [2022-11-23 03:01:57,845 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2022-11-23 03:01:57,846 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2022-11-23 03:01:57,846 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 139 flow [2022-11-23 03:01:57,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 467.75) internal successors, (1871), 4 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:57,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:01:57,848 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:01:57,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:01:58,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:58,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:01:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:01:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -502009268, now seen corresponding path program 3 times [2022-11-23 03:01:58,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:01:58,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981544117] [2022-11-23 03:01:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:58,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:01:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:01:58,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:01:58,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981544117] [2022-11-23 03:01:58,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981544117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:01:58,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050625102] [2022-11-23 03:01:58,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:01:58,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:58,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:01:58,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:01:58,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:01:58,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 03:01:58,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:01:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:01:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:01:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 03:01:58,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:01:58,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050625102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:01:58,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:01:58,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-11-23 03:01:58,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557109155] [2022-11-23 03:01:58,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:01:58,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:01:58,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:01:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:01:58,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:01:59,108 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 464 out of 1160 [2022-11-23 03:01:59,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 467.75) internal successors, (1871), 4 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:59,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:01:59,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 464 of 1160 [2022-11-23 03:01:59,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:01:59,525 INFO L130 PetriNetUnfolder]: 173/317 cut-off events. [2022-11-23 03:01:59,525 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-23 03:01:59,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 317 events. 173/317 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1099 event pairs, 96 based on Foata normal form. 3/251 useless extension candidates. Maximal degree in co-relation 720. Up to 256 conditions per place. [2022-11-23 03:01:59,527 INFO L137 encePairwiseOnDemand]: 1156/1160 looper letters, 51 selfloop transitions, 1 changer transitions 5/57 dead transitions. [2022-11-23 03:01:59,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 302 flow [2022-11-23 03:01:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:01:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:01:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1907 transitions. [2022-11-23 03:01:59,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41099137931034485 [2022-11-23 03:01:59,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1907 transitions. [2022-11-23 03:01:59,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1907 transitions. [2022-11-23 03:01:59,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:01:59,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1907 transitions. [2022-11-23 03:01:59,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 476.75) internal successors, (1907), 4 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:59,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1160.0) internal successors, (5800), 5 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:59,550 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1160.0) internal successors, (5800), 5 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:59,550 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 139 flow. Second operand 4 states and 1907 transitions. [2022-11-23 03:01:59,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 302 flow [2022-11-23 03:01:59,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-23 03:01:59,554 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 145 flow [2022-11-23 03:01:59,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-11-23 03:01:59,555 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2022-11-23 03:01:59,555 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 145 flow [2022-11-23 03:01:59,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 467.75) internal successors, (1871), 4 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:59,556 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:01:59,556 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:01:59,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:01:59,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:59,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:01:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:01:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1758695062, now seen corresponding path program 1 times [2022-11-23 03:01:59,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:01:59,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114354956] [2022-11-23 03:01:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:01:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:01:59,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:01:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114354956] [2022-11-23 03:01:59,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114354956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:01:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065671572] [2022-11-23 03:01:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:01:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:01:59,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:01:59,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:02:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:02:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:02:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:02:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:02:00,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:02:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:02:00,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065671572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:02:00,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:02:00,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 03:02:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121218425] [2022-11-23 03:02:00,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:02:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:02:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:02:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:02:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:02:00,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 1160 [2022-11-23 03:02:00,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 145 flow. Second operand has 13 states, 13 states have (on average 476.0769230769231) internal successors, (6189), 13 states have internal predecessors, (6189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:00,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:02:00,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 1160 [2022-11-23 03:02:00,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:02:00,651 INFO L130 PetriNetUnfolder]: 172/313 cut-off events. [2022-11-23 03:02:00,651 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-11-23 03:02:00,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 313 events. 172/313 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1006 event pairs, 124 based on Foata normal form. 1/267 useless extension candidates. Maximal degree in co-relation 752. Up to 304 conditions per place. [2022-11-23 03:02:00,653 INFO L137 encePairwiseOnDemand]: 1155/1160 looper letters, 27 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2022-11-23 03:02:00,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 235 flow [2022-11-23 03:02:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:02:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:02:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3359 transitions. [2022-11-23 03:02:00,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41366995073891627 [2022-11-23 03:02:00,689 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3359 transitions. [2022-11-23 03:02:00,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3359 transitions. [2022-11-23 03:02:00,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:02:00,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3359 transitions. [2022-11-23 03:02:00,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 479.85714285714283) internal successors, (3359), 7 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:00,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1160.0) internal successors, (9280), 8 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:00,725 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1160.0) internal successors, (9280), 8 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:00,726 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 145 flow. Second operand 7 states and 3359 transitions. [2022-11-23 03:02:00,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 235 flow [2022-11-23 03:02:00,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 232 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-23 03:02:00,728 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 188 flow [2022-11-23 03:02:00,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2022-11-23 03:02:00,729 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2022-11-23 03:02:00,729 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 188 flow [2022-11-23 03:02:00,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 476.0769230769231) internal successors, (6189), 13 states have internal predecessors, (6189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:00,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:02:00,732 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:02:00,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 03:02:00,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:02:00,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:02:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:02:00,939 INFO L85 PathProgramCache]: Analyzing trace with hash 255057855, now seen corresponding path program 2 times [2022-11-23 03:02:00,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:02:00,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560651395] [2022-11-23 03:02:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:02:00,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:02:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:02:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 03:02:01,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:02:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560651395] [2022-11-23 03:02:01,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560651395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:02:01,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:02:01,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:02:01,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951205493] [2022-11-23 03:02:01,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:02:01,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:02:01,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:02:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:02:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:02:01,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 1160 [2022-11-23 03:02:01,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 484.3333333333333) internal successors, (1453), 3 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:01,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:02:01,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 1160 [2022-11-23 03:02:01,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:02:01,456 INFO L130 PetriNetUnfolder]: 211/378 cut-off events. [2022-11-23 03:02:01,457 INFO L131 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2022-11-23 03:02:01,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 378 events. 211/378 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1324 event pairs, 124 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 846. Up to 318 conditions per place. [2022-11-23 03:02:01,459 INFO L137 encePairwiseOnDemand]: 1157/1160 looper letters, 53 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-11-23 03:02:01,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 337 flow [2022-11-23 03:02:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:02:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:02:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1483 transitions. [2022-11-23 03:02:01,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42614942528735633 [2022-11-23 03:02:01,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1483 transitions. [2022-11-23 03:02:01,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1483 transitions. [2022-11-23 03:02:01,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:02:01,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1483 transitions. [2022-11-23 03:02:01,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 494.3333333333333) internal successors, (1483), 3 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:01,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1160.0) internal successors, (4640), 4 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:01,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1160.0) internal successors, (4640), 4 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:01,475 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 188 flow. Second operand 3 states and 1483 transitions. [2022-11-23 03:02:01,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 337 flow [2022-11-23 03:02:01,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 313 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-23 03:02:01,480 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 176 flow [2022-11-23 03:02:01,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2022-11-23 03:02:01,483 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2022-11-23 03:02:01,484 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 176 flow [2022-11-23 03:02:01,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 484.3333333333333) internal successors, (1453), 3 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:01,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:02:01,485 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:02:01,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:02:01,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:02:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:02:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1694860498, now seen corresponding path program 1 times [2022-11-23 03:02:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:02:01,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034279957] [2022-11-23 03:02:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:02:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:02:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:02:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 03:02:01,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:02:01,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034279957] [2022-11-23 03:02:01,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034279957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:02:01,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:02:01,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:02:01,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890194369] [2022-11-23 03:02:01,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:02:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:02:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:02:01,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:02:01,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:02:01,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 1160 [2022-11-23 03:02:01,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 484.3333333333333) internal successors, (1453), 3 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:01,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:02:01,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 1160 [2022-11-23 03:02:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:02:02,073 INFO L130 PetriNetUnfolder]: 325/564 cut-off events. [2022-11-23 03:02:02,073 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2022-11-23 03:02:02,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 564 events. 325/564 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1978 event pairs, 167 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 1446. Up to 393 conditions per place. [2022-11-23 03:02:02,077 INFO L137 encePairwiseOnDemand]: 1156/1160 looper letters, 52 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2022-11-23 03:02:02,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 333 flow [2022-11-23 03:02:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:02:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:02:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1481 transitions. [2022-11-23 03:02:02,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4255747126436782 [2022-11-23 03:02:02,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1481 transitions. [2022-11-23 03:02:02,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1481 transitions. [2022-11-23 03:02:02,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:02:02,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1481 transitions. [2022-11-23 03:02:02,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1160.0) internal successors, (4640), 4 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1160.0) internal successors, (4640), 4 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,093 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 176 flow. Second operand 3 states and 1481 transitions. [2022-11-23 03:02:02,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 333 flow [2022-11-23 03:02:02,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 325 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-23 03:02:02,097 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 191 flow [2022-11-23 03:02:02,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-11-23 03:02:02,100 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2022-11-23 03:02:02,100 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 191 flow [2022-11-23 03:02:02,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 484.3333333333333) internal successors, (1453), 3 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:02:02,101 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:02:02,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 03:02:02,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:02:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:02:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash -411939430, now seen corresponding path program 1 times [2022-11-23 03:02:02,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:02:02,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806845931] [2022-11-23 03:02:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:02:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:02:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:02:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 03:02:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:02:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806845931] [2022-11-23 03:02:02,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806845931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:02:02,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:02:02,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:02:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180564641] [2022-11-23 03:02:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:02:02,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:02:02,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:02:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:02:02,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:02:02,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 480 out of 1160 [2022-11-23 03:02:02,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 485.6666666666667) internal successors, (1457), 3 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:02:02,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 480 of 1160 [2022-11-23 03:02:02,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:02:02,918 INFO L130 PetriNetUnfolder]: 259/450 cut-off events. [2022-11-23 03:02:02,919 INFO L131 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2022-11-23 03:02:02,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 450 events. 259/450 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1392 event pairs, 94 based on Foata normal form. 38/434 useless extension candidates. Maximal degree in co-relation 1138. Up to 419 conditions per place. [2022-11-23 03:02:02,922 INFO L137 encePairwiseOnDemand]: 1156/1160 looper letters, 43 selfloop transitions, 2 changer transitions 4/49 dead transitions. [2022-11-23 03:02:02,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 314 flow [2022-11-23 03:02:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:02:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:02:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1478 transitions. [2022-11-23 03:02:02,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4247126436781609 [2022-11-23 03:02:02,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1478 transitions. [2022-11-23 03:02:02,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1478 transitions. [2022-11-23 03:02:02,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:02:02,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1478 transitions. [2022-11-23 03:02:02,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 492.6666666666667) internal successors, (1478), 3 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1160.0) internal successors, (4640), 4 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1160.0) internal successors, (4640), 4 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,937 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 191 flow. Second operand 3 states and 1478 transitions. [2022-11-23 03:02:02,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 314 flow [2022-11-23 03:02:02,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:02:02,940 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 198 flow [2022-11-23 03:02:02,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2022-11-23 03:02:02,943 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2022-11-23 03:02:02,943 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 198 flow [2022-11-23 03:02:02,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 485.6666666666667) internal successors, (1457), 3 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:02,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:02:02,945 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:02:02,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:02:02,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:02:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:02:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1179175399, now seen corresponding path program 1 times [2022-11-23 03:02:02,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:02:02,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927713637] [2022-11-23 03:02:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:02:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:02:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:02:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 03:02:07,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:02:07,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927713637] [2022-11-23 03:02:07,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927713637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:02:07,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009762330] [2022-11-23 03:02:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:02:07,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:02:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:02:07,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:02:07,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:02:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:02:07,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 03:02:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:02:08,781 INFO L321 Elim1Store]: treesize reduction 20, result has 42.9 percent of original size [2022-11-23 03:02:08,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 03:02:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 03:02:08,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:02:12,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:02:12,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 684 treesize of output 638 [2022-11-23 03:02:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 03:02:15,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009762330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:02:15,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:02:15,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 32 [2022-11-23 03:02:15,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244452393] [2022-11-23 03:02:15,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:02:15,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 03:02:15,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:02:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 03:02:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 03:02:22,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 432 out of 1160 [2022-11-23 03:02:22,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 198 flow. Second operand has 33 states, 33 states have (on average 434.2121212121212) internal successors, (14329), 33 states have internal predecessors, (14329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:22,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:02:22,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 432 of 1160 [2022-11-23 03:02:22,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:02:31,241 INFO L130 PetriNetUnfolder]: 709/1219 cut-off events. [2022-11-23 03:02:31,241 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-11-23 03:02:31,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3098 conditions, 1219 events. 709/1219 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5160 event pairs, 50 based on Foata normal form. 5/1018 useless extension candidates. Maximal degree in co-relation 3031. Up to 383 conditions per place. [2022-11-23 03:02:31,250 INFO L137 encePairwiseOnDemand]: 1145/1160 looper letters, 171 selfloop transitions, 113 changer transitions 20/304 dead transitions. [2022-11-23 03:02:31,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 304 transitions, 1526 flow [2022-11-23 03:02:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-23 03:02:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-23 03:02:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 17571 transitions. [2022-11-23 03:02:31,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3786853448275862 [2022-11-23 03:02:31,297 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 17571 transitions. [2022-11-23 03:02:31,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 17571 transitions. [2022-11-23 03:02:31,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:02:31,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 17571 transitions. [2022-11-23 03:02:31,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 439.275) internal successors, (17571), 40 states have internal predecessors, (17571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:31,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 1160.0) internal successors, (47560), 41 states have internal predecessors, (47560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:31,406 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 1160.0) internal successors, (47560), 41 states have internal predecessors, (47560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:31,407 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 198 flow. Second operand 40 states and 17571 transitions. [2022-11-23 03:02:31,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 304 transitions, 1526 flow [2022-11-23 03:02:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 304 transitions, 1510 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-23 03:02:31,414 INFO L231 Difference]: Finished difference. Result has 107 places, 161 transitions, 1075 flow [2022-11-23 03:02:31,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1160, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1075, PETRI_PLACES=107, PETRI_TRANSITIONS=161} [2022-11-23 03:02:31,415 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 78 predicate places. [2022-11-23 03:02:31,415 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 161 transitions, 1075 flow [2022-11-23 03:02:31,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 434.2121212121212) internal successors, (14329), 33 states have internal predecessors, (14329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:02:31,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:02:31,419 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:02:31,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:02:31,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:02:31,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:02:31,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:02:31,627 INFO L85 PathProgramCache]: Analyzing trace with hash -904896917, now seen corresponding path program 2 times [2022-11-23 03:02:31,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:02:31,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614459853] [2022-11-23 03:02:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:02:31,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:02:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:02:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:02:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:02:35,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614459853] [2022-11-23 03:02:35,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614459853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:02:35,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007222589] [2022-11-23 03:02:35,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:02:35,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:02:35,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:02:35,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:02:35,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47ae254-bdcf-4882-b693-b33432e6ab55/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:02:35,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:02:35,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:02:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 03:02:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:02:36,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:02:36,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 77 [2022-11-23 03:02:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 03:02:37,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:02:43,688 INFO L321 Elim1Store]: treesize reduction 220, result has 67.1 percent of original size [2022-11-23 03:02:43,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 214 treesize of output 582