./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8 --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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- 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-e04fb08 [2022-11-16 11:43:44,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:43:44,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:43:44,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:43:44,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:43:44,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:43:44,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:43:44,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:43:44,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:43:44,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:43:44,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:43:44,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:43:44,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:43:44,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:43:44,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:43:44,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:43:44,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:43:44,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:43:44,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:43:44,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:43:44,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:43:44,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:43:44,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:43:44,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:43:44,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:43:44,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:43:44,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:43:44,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:43:44,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:43:44,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:43:44,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:43:44,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:43:44,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:43:44,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:43:44,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:43:44,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:43:44,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:43:44,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:43:44,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:43:44,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:43:44,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:43:44,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:43:44,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:43:44,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:43:44,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:43:44,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:43:44,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:43:44,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:43:44,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:43:44,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:43:44,986 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:43:44,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:43:44,986 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:43:44,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:43:44,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:43:44,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:43:44,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:43:44,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:43:44,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:43:44,988 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:43:44,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:43:44,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:43:44,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:43:44,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:43:44,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:43:44,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:43:44,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:43:44,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:43:44,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:43:44,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:43:44,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:43:44,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:43:44,992 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:43:44,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:43:44,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:43:44,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2022-11-16 11:43:45,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:43:45,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:43:45,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:43:45,289 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:43:45,289 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:43:45,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-11-16 11:43:45,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/data/277433602/1417f14bcfa74062a443983f66838ac7/FLAGac515a080 [2022-11-16 11:43:45,898 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:43:45,899 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-11-16 11:43:45,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/data/277433602/1417f14bcfa74062a443983f66838ac7/FLAGac515a080 [2022-11-16 11:43:46,262 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/data/277433602/1417f14bcfa74062a443983f66838ac7 [2022-11-16 11:43:46,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:43:46,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:43:46,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:43:46,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:43:46,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:43:46,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648d3628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46, skipping insertion in model container [2022-11-16 11:43:46,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:43:46,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:43:46,531 WARN L229 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_dad2997b-238a-4a9d-9fd6-a53241716600/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-11-16 11:43:46,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:43:46,547 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:43:46,572 WARN L229 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_dad2997b-238a-4a9d-9fd6-a53241716600/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-11-16 11:43:46,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:43:46,589 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:43:46,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46 WrapperNode [2022-11-16 11:43:46,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:43:46,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:43:46,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:43:46,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:43:46,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,632 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 183 [2022-11-16 11:43:46,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:43:46,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:43:46,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:43:46,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:43:46,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,660 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:43:46,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:43:46,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:43:46,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:43:46,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (1/1) ... [2022-11-16 11:43:46,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:43:46,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:46,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:43:46,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:43:46,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:43:46,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:43:46,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:43:46,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:43:46,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:43:46,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:43:46,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:43:46,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:43:46,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:43:46,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:43:46,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:43:46,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:43:46,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:43:46,769 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:43:46,927 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:43:46,930 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:43:47,390 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:43:47,401 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:43:47,401 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:43:47,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:47 BoogieIcfgContainer [2022-11-16 11:43:47,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:43:47,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:43:47,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:43:47,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:43:47,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:43:46" (1/3) ... [2022-11-16 11:43:47,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50abdf27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:43:47, skipping insertion in model container [2022-11-16 11:43:47,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:46" (2/3) ... [2022-11-16 11:43:47,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50abdf27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:43:47, skipping insertion in model container [2022-11-16 11:43:47,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:47" (3/3) ... [2022-11-16 11:43:47,415 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2022-11-16 11:43:47,424 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:43:47,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:43:47,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:43:47,436 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:43:47,643 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:43:47,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 239 transitions, 494 flow [2022-11-16 11:43:47,781 INFO L130 PetriNetUnfolder]: 21/237 cut-off events. [2022-11-16 11:43:47,781 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:43:47,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 237 events. 21/237 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 400 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2022-11-16 11:43:47,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 239 transitions, 494 flow [2022-11-16 11:43:47,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 228 transitions, 468 flow [2022-11-16 11:43:47,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:43:47,813 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;@58173b16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:43:47,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:43:47,871 INFO L130 PetriNetUnfolder]: 18/198 cut-off events. [2022-11-16 11:43:47,872 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:43:47,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:47,873 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:47,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:47,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1552535207, now seen corresponding path program 1 times [2022-11-16 11:43:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:47,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636783120] [2022-11-16 11:43:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:48,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:48,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636783120] [2022-11-16 11:43:48,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636783120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:48,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:48,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:43:48,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282014721] [2022-11-16 11:43:48,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:48,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:43:48,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:43:48,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:43:48,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 239 [2022-11-16 11:43:48,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 228 transitions, 468 flow. Second operand has 2 states, 2 states have (on average 222.5) internal successors, (445), 2 states have internal predecessors, (445), 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) [2022-11-16 11:43:48,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:48,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 239 [2022-11-16 11:43:48,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:48,368 INFO L130 PetriNetUnfolder]: 6/213 cut-off events. [2022-11-16 11:43:48,368 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 11:43:48,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 213 events. 6/213 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 378 event pairs, 0 based on Foata normal form. 18/213 useless extension candidates. Maximal degree in co-relation 132. Up to 5 conditions per place. [2022-11-16 11:43:48,375 INFO L137 encePairwiseOnDemand]: 224/239 looper letters, 4 selfloop transitions, 0 changer transitions 4/213 dead transitions. [2022-11-16 11:43:48,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 213 transitions, 446 flow [2022-11-16 11:43:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:43:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:43:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-11-16 11:43:48,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9560669456066946 [2022-11-16 11:43:48,400 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-11-16 11:43:48,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-11-16 11:43:48,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:48,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-11-16 11:43:48,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 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) [2022-11-16 11:43:48,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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) [2022-11-16 11:43:48,425 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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) [2022-11-16 11:43:48,427 INFO L175 Difference]: Start difference. First operand has 214 places, 228 transitions, 468 flow. Second operand 2 states and 457 transitions. [2022-11-16 11:43:48,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 213 transitions, 446 flow [2022-11-16 11:43:48,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 213 transitions, 438 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:43:48,443 INFO L231 Difference]: Finished difference. Result has 211 places, 209 transitions, 422 flow [2022-11-16 11:43:48,446 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=422, PETRI_PLACES=211, PETRI_TRANSITIONS=209} [2022-11-16 11:43:48,450 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, -3 predicate places. [2022-11-16 11:43:48,450 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 209 transitions, 422 flow [2022-11-16 11:43:48,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 222.5) internal successors, (445), 2 states have internal predecessors, (445), 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) [2022-11-16 11:43:48,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:48,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:48,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:43:48,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:48,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:48,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1815723578, now seen corresponding path program 1 times [2022-11-16 11:43:48,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:48,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289234771] [2022-11-16 11:43:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:48,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:49,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:49,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289234771] [2022-11-16 11:43:49,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289234771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:49,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:49,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:43:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098863666] [2022-11-16 11:43:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:43:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:49,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:43:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:43:49,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 239 [2022-11-16 11:43:49,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 209 transitions, 422 flow. Second operand has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 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) [2022-11-16 11:43:49,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:49,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 239 [2022-11-16 11:43:49,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:49,346 INFO L130 PetriNetUnfolder]: 180/850 cut-off events. [2022-11-16 11:43:49,346 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-16 11:43:49,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1157 conditions, 850 events. 180/850 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4187 event pairs, 65 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 1154. Up to 220 conditions per place. [2022-11-16 11:43:49,354 INFO L137 encePairwiseOnDemand]: 233/239 looper letters, 43 selfloop transitions, 5 changer transitions 0/226 dead transitions. [2022-11-16 11:43:49,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 226 transitions, 554 flow [2022-11-16 11:43:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:43:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:43:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2022-11-16 11:43:49,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.854602510460251 [2022-11-16 11:43:49,360 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2022-11-16 11:43:49,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2022-11-16 11:43:49,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:49,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2022-11-16 11:43:49,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 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) [2022-11-16 11:43:49,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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) [2022-11-16 11:43:49,370 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 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) [2022-11-16 11:43:49,371 INFO L175 Difference]: Start difference. First operand has 211 places, 209 transitions, 422 flow. Second operand 4 states and 817 transitions. [2022-11-16 11:43:49,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 226 transitions, 554 flow [2022-11-16 11:43:49,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 226 transitions, 554 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:43:49,383 INFO L231 Difference]: Finished difference. Result has 212 places, 213 transitions, 456 flow [2022-11-16 11:43:49,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=456, PETRI_PLACES=212, PETRI_TRANSITIONS=213} [2022-11-16 11:43:49,385 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, -2 predicate places. [2022-11-16 11:43:49,385 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 213 transitions, 456 flow [2022-11-16 11:43:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 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) [2022-11-16 11:43:49,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:49,387 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:49,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:43:49,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash 15870066, now seen corresponding path program 1 times [2022-11-16 11:43:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:49,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330608210] [2022-11-16 11:43:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:49,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:50,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:50,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330608210] [2022-11-16 11:43:50,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330608210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:50,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:50,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:43:50,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807053037] [2022-11-16 11:43:50,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:50,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:43:50,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:43:50,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:50,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 239 [2022-11-16 11:43:50,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 213 transitions, 456 flow. Second operand has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 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) [2022-11-16 11:43:50,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:50,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 239 [2022-11-16 11:43:50,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:50,928 INFO L130 PetriNetUnfolder]: 409/2019 cut-off events. [2022-11-16 11:43:50,928 INFO L131 PetriNetUnfolder]: For 137/148 co-relation queries the response was YES. [2022-11-16 11:43:50,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2947 conditions, 2019 events. 409/2019 cut-off events. For 137/148 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 14779 event pairs, 183 based on Foata normal form. 3/1801 useless extension candidates. Maximal degree in co-relation 2941. Up to 404 conditions per place. [2022-11-16 11:43:50,940 INFO L137 encePairwiseOnDemand]: 231/239 looper letters, 97 selfloop transitions, 7 changer transitions 0/279 dead transitions. [2022-11-16 11:43:50,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 279 transitions, 856 flow [2022-11-16 11:43:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:43:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:43:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1227 transitions. [2022-11-16 11:43:50,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8556485355648535 [2022-11-16 11:43:50,944 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1227 transitions. [2022-11-16 11:43:50,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1227 transitions. [2022-11-16 11:43:50,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:50,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1227 transitions. [2022-11-16 11:43:50,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.5) internal successors, (1227), 6 states have internal predecessors, (1227), 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) [2022-11-16 11:43:50,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 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) [2022-11-16 11:43:50,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 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) [2022-11-16 11:43:50,953 INFO L175 Difference]: Start difference. First operand has 212 places, 213 transitions, 456 flow. Second operand 6 states and 1227 transitions. [2022-11-16 11:43:50,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 279 transitions, 856 flow [2022-11-16 11:43:50,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 279 transitions, 843 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:43:50,960 INFO L231 Difference]: Finished difference. Result has 219 places, 217 transitions, 496 flow [2022-11-16 11:43:50,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=496, PETRI_PLACES=219, PETRI_TRANSITIONS=217} [2022-11-16 11:43:50,962 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 5 predicate places. [2022-11-16 11:43:50,962 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 217 transitions, 496 flow [2022-11-16 11:43:50,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 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) [2022-11-16 11:43:50,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:50,963 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:50,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:43:50,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash -686201896, now seen corresponding path program 2 times [2022-11-16 11:43:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:50,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627952168] [2022-11-16 11:43:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:50,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:51,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627952168] [2022-11-16 11:43:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627952168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:51,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:51,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:43:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280509389] [2022-11-16 11:43:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:51,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:43:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:43:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:43:51,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 239 [2022-11-16 11:43:51,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 217 transitions, 496 flow. Second operand has 6 states, 6 states have (on average 193.5) internal successors, (1161), 6 states have internal predecessors, (1161), 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) [2022-11-16 11:43:51,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:51,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 239 [2022-11-16 11:43:51,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:51,693 INFO L130 PetriNetUnfolder]: 222/1269 cut-off events. [2022-11-16 11:43:51,694 INFO L131 PetriNetUnfolder]: For 282/337 co-relation queries the response was YES. [2022-11-16 11:43:51,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1924 conditions, 1269 events. 222/1269 cut-off events. For 282/337 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 8693 event pairs, 104 based on Foata normal form. 62/1237 useless extension candidates. Maximal degree in co-relation 1915. Up to 296 conditions per place. [2022-11-16 11:43:51,703 INFO L137 encePairwiseOnDemand]: 229/239 looper letters, 54 selfloop transitions, 10 changer transitions 0/242 dead transitions. [2022-11-16 11:43:51,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 242 transitions, 707 flow [2022-11-16 11:43:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:43:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:43:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1395 transitions. [2022-11-16 11:43:51,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8338314405260012 [2022-11-16 11:43:51,708 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1395 transitions. [2022-11-16 11:43:51,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1395 transitions. [2022-11-16 11:43:51,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:51,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1395 transitions. [2022-11-16 11:43:51,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.28571428571428) internal successors, (1395), 7 states have internal predecessors, (1395), 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) [2022-11-16 11:43:51,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 239.0) internal successors, (1912), 8 states have internal predecessors, (1912), 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) [2022-11-16 11:43:51,722 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 239.0) internal successors, (1912), 8 states have internal predecessors, (1912), 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) [2022-11-16 11:43:51,722 INFO L175 Difference]: Start difference. First operand has 219 places, 217 transitions, 496 flow. Second operand 7 states and 1395 transitions. [2022-11-16 11:43:51,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 242 transitions, 707 flow [2022-11-16 11:43:51,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 242 transitions, 697 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-16 11:43:51,731 INFO L231 Difference]: Finished difference. Result has 227 places, 219 transitions, 531 flow [2022-11-16 11:43:51,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=531, PETRI_PLACES=227, PETRI_TRANSITIONS=219} [2022-11-16 11:43:51,734 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 13 predicate places. [2022-11-16 11:43:51,735 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 219 transitions, 531 flow [2022-11-16 11:43:51,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.5) internal successors, (1161), 6 states have internal predecessors, (1161), 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) [2022-11-16 11:43:51,742 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:51,743 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:43:51,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash -923931526, now seen corresponding path program 1 times [2022-11-16 11:43:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:51,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711389624] [2022-11-16 11:43:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:52,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:52,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711389624] [2022-11-16 11:43:52,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711389624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:52,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:52,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:43:52,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016130972] [2022-11-16 11:43:52,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:52,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:43:52,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:43:52,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:43:52,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 239 [2022-11-16 11:43:52,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 219 transitions, 531 flow. Second operand has 6 states, 6 states have (on average 191.83333333333334) internal successors, (1151), 6 states have internal predecessors, (1151), 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) [2022-11-16 11:43:52,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:52,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 239 [2022-11-16 11:43:52,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:52,806 INFO L130 PetriNetUnfolder]: 456/2335 cut-off events. [2022-11-16 11:43:52,806 INFO L131 PetriNetUnfolder]: For 816/820 co-relation queries the response was YES. [2022-11-16 11:43:52,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3835 conditions, 2335 events. 456/2335 cut-off events. For 816/820 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 17858 event pairs, 219 based on Foata normal form. 15/2177 useless extension candidates. Maximal degree in co-relation 3823. Up to 572 conditions per place. [2022-11-16 11:43:52,822 INFO L137 encePairwiseOnDemand]: 232/239 looper letters, 72 selfloop transitions, 13 changer transitions 0/261 dead transitions. [2022-11-16 11:43:52,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 261 transitions, 850 flow [2022-11-16 11:43:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:43:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:43:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1214 transitions. [2022-11-16 11:43:52,826 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8465829846582985 [2022-11-16 11:43:52,826 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1214 transitions. [2022-11-16 11:43:52,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1214 transitions. [2022-11-16 11:43:52,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:52,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1214 transitions. [2022-11-16 11:43:52,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.33333333333334) internal successors, (1214), 6 states have internal predecessors, (1214), 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) [2022-11-16 11:43:52,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 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) [2022-11-16 11:43:52,834 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 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) [2022-11-16 11:43:52,834 INFO L175 Difference]: Start difference. First operand has 227 places, 219 transitions, 531 flow. Second operand 6 states and 1214 transitions. [2022-11-16 11:43:52,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 261 transitions, 850 flow [2022-11-16 11:43:52,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 261 transitions, 834 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:43:52,845 INFO L231 Difference]: Finished difference. Result has 233 places, 228 transitions, 626 flow [2022-11-16 11:43:52,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=626, PETRI_PLACES=233, PETRI_TRANSITIONS=228} [2022-11-16 11:43:52,849 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 19 predicate places. [2022-11-16 11:43:52,849 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 228 transitions, 626 flow [2022-11-16 11:43:52,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.83333333333334) internal successors, (1151), 6 states have internal predecessors, (1151), 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) [2022-11-16 11:43:52,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:52,850 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:52,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:43:52,851 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1541077236, now seen corresponding path program 2 times [2022-11-16 11:43:52,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:52,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254214524] [2022-11-16 11:43:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:52,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:53,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254214524] [2022-11-16 11:43:53,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254214524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:53,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:53,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:43:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617649399] [2022-11-16 11:43:53,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:53,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:43:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:43:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:43:53,307 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 239 [2022-11-16 11:43:53,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 228 transitions, 626 flow. Second operand has 6 states, 6 states have (on average 191.83333333333334) internal successors, (1151), 6 states have internal predecessors, (1151), 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) [2022-11-16 11:43:53,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:53,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 239 [2022-11-16 11:43:53,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:53,924 INFO L130 PetriNetUnfolder]: 485/2497 cut-off events. [2022-11-16 11:43:53,924 INFO L131 PetriNetUnfolder]: For 1237/1241 co-relation queries the response was YES. [2022-11-16 11:43:53,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4342 conditions, 2497 events. 485/2497 cut-off events. For 1237/1241 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 19819 event pairs, 181 based on Foata normal form. 15/2319 useless extension candidates. Maximal degree in co-relation 4325. Up to 409 conditions per place. [2022-11-16 11:43:53,945 INFO L137 encePairwiseOnDemand]: 232/239 looper letters, 94 selfloop transitions, 15 changer transitions 0/285 dead transitions. [2022-11-16 11:43:53,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 285 transitions, 1046 flow [2022-11-16 11:43:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:43:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:43:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1228 transitions. [2022-11-16 11:43:53,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8563458856345886 [2022-11-16 11:43:53,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1228 transitions. [2022-11-16 11:43:53,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1228 transitions. [2022-11-16 11:43:53,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:53,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1228 transitions. [2022-11-16 11:43:53,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.66666666666666) internal successors, (1228), 6 states have internal predecessors, (1228), 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) [2022-11-16 11:43:53,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 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) [2022-11-16 11:43:53,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 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) [2022-11-16 11:43:53,959 INFO L175 Difference]: Start difference. First operand has 233 places, 228 transitions, 626 flow. Second operand 6 states and 1228 transitions. [2022-11-16 11:43:53,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 285 transitions, 1046 flow [2022-11-16 11:43:53,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 285 transitions, 1042 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-16 11:43:53,972 INFO L231 Difference]: Finished difference. Result has 242 places, 234 transitions, 739 flow [2022-11-16 11:43:53,972 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=739, PETRI_PLACES=242, PETRI_TRANSITIONS=234} [2022-11-16 11:43:53,975 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 28 predicate places. [2022-11-16 11:43:53,975 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 234 transitions, 739 flow [2022-11-16 11:43:53,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.83333333333334) internal successors, (1151), 6 states have internal predecessors, (1151), 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) [2022-11-16 11:43:53,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:53,976 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:53,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:43:53,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash 294069770, now seen corresponding path program 3 times [2022-11-16 11:43:53,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:53,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396699704] [2022-11-16 11:43:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:54,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396699704] [2022-11-16 11:43:54,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396699704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:54,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:54,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:43:54,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305367246] [2022-11-16 11:43:54,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:54,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:43:54,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:54,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:43:54,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:43:54,333 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 239 [2022-11-16 11:43:54,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 234 transitions, 739 flow. Second operand has 6 states, 6 states have (on average 191.83333333333334) internal successors, (1151), 6 states have internal predecessors, (1151), 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) [2022-11-16 11:43:54,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:54,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 239 [2022-11-16 11:43:54,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:55,027 INFO L130 PetriNetUnfolder]: 551/2868 cut-off events. [2022-11-16 11:43:55,028 INFO L131 PetriNetUnfolder]: For 2467/2467 co-relation queries the response was YES. [2022-11-16 11:43:55,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5140 conditions, 2868 events. 551/2868 cut-off events. For 2467/2467 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 23403 event pairs, 239 based on Foata normal form. 11/2677 useless extension candidates. Maximal degree in co-relation 5118. Up to 537 conditions per place. [2022-11-16 11:43:55,053 INFO L137 encePairwiseOnDemand]: 232/239 looper letters, 83 selfloop transitions, 18 changer transitions 0/277 dead transitions. [2022-11-16 11:43:55,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 277 transitions, 1098 flow [2022-11-16 11:43:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:43:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:43:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1408 transitions. [2022-11-16 11:43:55,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8416019127316199 [2022-11-16 11:43:55,058 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1408 transitions. [2022-11-16 11:43:55,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1408 transitions. [2022-11-16 11:43:55,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:55,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1408 transitions. [2022-11-16 11:43:55,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.14285714285714) internal successors, (1408), 7 states have internal predecessors, (1408), 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) [2022-11-16 11:43:55,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 239.0) internal successors, (1912), 8 states have internal predecessors, (1912), 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) [2022-11-16 11:43:55,067 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 239.0) internal successors, (1912), 8 states have internal predecessors, (1912), 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) [2022-11-16 11:43:55,067 INFO L175 Difference]: Start difference. First operand has 242 places, 234 transitions, 739 flow. Second operand 7 states and 1408 transitions. [2022-11-16 11:43:55,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 277 transitions, 1098 flow [2022-11-16 11:43:55,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 277 transitions, 1073 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:43:55,080 INFO L231 Difference]: Finished difference. Result has 251 places, 238 transitions, 821 flow [2022-11-16 11:43:55,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=821, PETRI_PLACES=251, PETRI_TRANSITIONS=238} [2022-11-16 11:43:55,082 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 37 predicate places. [2022-11-16 11:43:55,082 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 238 transitions, 821 flow [2022-11-16 11:43:55,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.83333333333334) internal successors, (1151), 6 states have internal predecessors, (1151), 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) [2022-11-16 11:43:55,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:55,083 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:55,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:43:55,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash 242298958, now seen corresponding path program 4 times [2022-11-16 11:43:55,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:55,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727478005] [2022-11-16 11:43:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:55,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727478005] [2022-11-16 11:43:55,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727478005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:55,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:55,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:43:55,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300669939] [2022-11-16 11:43:55,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:55,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:43:55,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:43:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:55,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 239 [2022-11-16 11:43:55,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 238 transitions, 821 flow. Second operand has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 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) [2022-11-16 11:43:55,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:55,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 239 [2022-11-16 11:43:55,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:56,080 INFO L130 PetriNetUnfolder]: 538/2772 cut-off events. [2022-11-16 11:43:56,080 INFO L131 PetriNetUnfolder]: For 3276/3285 co-relation queries the response was YES. [2022-11-16 11:43:56,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5121 conditions, 2772 events. 538/2772 cut-off events. For 3276/3285 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 22286 event pairs, 304 based on Foata normal form. 3/2576 useless extension candidates. Maximal degree in co-relation 5095. Up to 485 conditions per place. [2022-11-16 11:43:56,103 INFO L137 encePairwiseOnDemand]: 232/239 looper letters, 83 selfloop transitions, 20 changer transitions 0/279 dead transitions. [2022-11-16 11:43:56,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 279 transitions, 1171 flow [2022-11-16 11:43:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:43:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1026 transitions. [2022-11-16 11:43:56,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8585774058577406 [2022-11-16 11:43:56,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1026 transitions. [2022-11-16 11:43:56,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1026 transitions. [2022-11-16 11:43:56,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:56,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1026 transitions. [2022-11-16 11:43:56,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 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) [2022-11-16 11:43:56,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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) [2022-11-16 11:43:56,117 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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) [2022-11-16 11:43:56,117 INFO L175 Difference]: Start difference. First operand has 251 places, 238 transitions, 821 flow. Second operand 5 states and 1026 transitions. [2022-11-16 11:43:56,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 279 transitions, 1171 flow [2022-11-16 11:43:56,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 279 transitions, 1148 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-16 11:43:56,133 INFO L231 Difference]: Finished difference. Result has 255 places, 240 transitions, 887 flow [2022-11-16 11:43:56,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=887, PETRI_PLACES=255, PETRI_TRANSITIONS=240} [2022-11-16 11:43:56,134 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 41 predicate places. [2022-11-16 11:43:56,135 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 240 transitions, 887 flow [2022-11-16 11:43:56,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 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) [2022-11-16 11:43:56,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:56,136 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:56,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:43:56,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash 33061738, now seen corresponding path program 5 times [2022-11-16 11:43:56,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:56,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803348747] [2022-11-16 11:43:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:56,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:56,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:56,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803348747] [2022-11-16 11:43:56,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803348747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:56,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:56,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:43:56,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809370837] [2022-11-16 11:43:56,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:56,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:43:56,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:43:56,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:56,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 239 [2022-11-16 11:43:56,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 240 transitions, 887 flow. Second operand has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 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) [2022-11-16 11:43:56,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:56,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 239 [2022-11-16 11:43:56,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:57,199 INFO L130 PetriNetUnfolder]: 525/2672 cut-off events. [2022-11-16 11:43:57,199 INFO L131 PetriNetUnfolder]: For 3724/3726 co-relation queries the response was YES. [2022-11-16 11:43:57,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5074 conditions, 2672 events. 525/2672 cut-off events. For 3724/3726 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 21057 event pairs, 291 based on Foata normal form. 4/2478 useless extension candidates. Maximal degree in co-relation 5046. Up to 778 conditions per place. [2022-11-16 11:43:57,229 INFO L137 encePairwiseOnDemand]: 232/239 looper letters, 64 selfloop transitions, 19 changer transitions 0/259 dead transitions. [2022-11-16 11:43:57,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 259 transitions, 1125 flow [2022-11-16 11:43:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:43:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1008 transitions. [2022-11-16 11:43:57,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8435146443514644 [2022-11-16 11:43:57,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1008 transitions. [2022-11-16 11:43:57,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1008 transitions. [2022-11-16 11:43:57,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:57,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1008 transitions. [2022-11-16 11:43:57,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 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) [2022-11-16 11:43:57,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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) [2022-11-16 11:43:57,240 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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) [2022-11-16 11:43:57,240 INFO L175 Difference]: Start difference. First operand has 255 places, 240 transitions, 887 flow. Second operand 5 states and 1008 transitions. [2022-11-16 11:43:57,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 259 transitions, 1125 flow [2022-11-16 11:43:57,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 259 transitions, 1083 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-16 11:43:57,258 INFO L231 Difference]: Finished difference. Result has 259 places, 242 transitions, 927 flow [2022-11-16 11:43:57,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=927, PETRI_PLACES=259, PETRI_TRANSITIONS=242} [2022-11-16 11:43:57,259 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 45 predicate places. [2022-11-16 11:43:57,260 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 242 transitions, 927 flow [2022-11-16 11:43:57,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 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) [2022-11-16 11:43:57,260 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:57,261 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:57,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:43:57,261 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 818578001, now seen corresponding path program 1 times [2022-11-16 11:43:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519435746] [2022-11-16 11:43:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:57,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:57,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519435746] [2022-11-16 11:43:57,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519435746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:57,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225184983] [2022-11-16 11:43:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:57,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:57,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:57,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:43:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:43:57,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:43:58,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:43:58,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225184983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:58,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:43:58,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-16 11:43:58,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964561240] [2022-11-16 11:43:58,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:58,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:43:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:43:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:43:58,122 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 239 [2022-11-16 11:43:58,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 242 transitions, 927 flow. Second operand has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2022-11-16 11:43:58,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:58,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 239 [2022-11-16 11:43:58,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:58,750 INFO L130 PetriNetUnfolder]: 376/2125 cut-off events. [2022-11-16 11:43:58,750 INFO L131 PetriNetUnfolder]: For 1364/1374 co-relation queries the response was YES. [2022-11-16 11:43:58,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3668 conditions, 2125 events. 376/2125 cut-off events. For 1364/1374 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 17192 event pairs, 204 based on Foata normal form. 0/1972 useless extension candidates. Maximal degree in co-relation 3638. Up to 583 conditions per place. [2022-11-16 11:43:58,773 INFO L137 encePairwiseOnDemand]: 219/239 looper letters, 47 selfloop transitions, 13 changer transitions 18/265 dead transitions. [2022-11-16 11:43:58,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 265 transitions, 1135 flow [2022-11-16 11:43:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:43:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:43:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1760 transitions. [2022-11-16 11:43:58,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7364016736401674 [2022-11-16 11:43:58,779 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1760 transitions. [2022-11-16 11:43:58,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1760 transitions. [2022-11-16 11:43:58,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:58,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1760 transitions. [2022-11-16 11:43:58,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 176.0) internal successors, (1760), 10 states have internal predecessors, (1760), 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) [2022-11-16 11:43:58,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 239.0) internal successors, (2629), 11 states have internal predecessors, (2629), 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) [2022-11-16 11:43:58,790 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 239.0) internal successors, (2629), 11 states have internal predecessors, (2629), 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) [2022-11-16 11:43:58,790 INFO L175 Difference]: Start difference. First operand has 259 places, 242 transitions, 927 flow. Second operand 10 states and 1760 transitions. [2022-11-16 11:43:58,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 265 transitions, 1135 flow [2022-11-16 11:43:58,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 265 transitions, 1094 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-16 11:43:58,803 INFO L231 Difference]: Finished difference. Result has 270 places, 243 transitions, 932 flow [2022-11-16 11:43:58,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=932, PETRI_PLACES=270, PETRI_TRANSITIONS=243} [2022-11-16 11:43:58,805 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 56 predicate places. [2022-11-16 11:43:58,805 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 243 transitions, 932 flow [2022-11-16 11:43:58,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2022-11-16 11:43:58,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:58,806 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:58,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:59,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:59,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:59,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1759845030, now seen corresponding path program 1 times [2022-11-16 11:43:59,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:59,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252271207] [2022-11-16 11:43:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:43:59,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:59,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252271207] [2022-11-16 11:43:59,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252271207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:59,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080923596] [2022-11-16 11:43:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:59,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:59,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:59,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:59,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:43:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:43:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:00,627 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 11:44:00,627 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 19 treesize of output 10 [2022-11-16 11:44:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:00,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:01,483 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 11:44:01,484 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 19 treesize of output 11 [2022-11-16 11:44:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:02,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080923596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:02,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:02,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 36 [2022-11-16 11:44:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257026742] [2022-11-16 11:44:02,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:44:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:44:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:44:02,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 239 [2022-11-16 11:44:02,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 243 transitions, 932 flow. Second operand has 36 states, 36 states have (on average 96.63888888888889) internal successors, (3479), 36 states have internal predecessors, (3479), 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) [2022-11-16 11:44:02,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:02,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 239 [2022-11-16 11:44:02,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:32,467 INFO L130 PetriNetUnfolder]: 23125/47495 cut-off events. [2022-11-16 11:44:32,467 INFO L131 PetriNetUnfolder]: For 43225/43247 co-relation queries the response was YES. [2022-11-16 11:44:32,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107368 conditions, 47495 events. 23125/47495 cut-off events. For 43225/43247 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 476503 event pairs, 1760 based on Foata normal form. 104/46774 useless extension candidates. Maximal degree in co-relation 107334. Up to 7455 conditions per place. [2022-11-16 11:44:32,965 INFO L137 encePairwiseOnDemand]: 172/239 looper letters, 2097 selfloop transitions, 576 changer transitions 436/3191 dead transitions. [2022-11-16 11:44:32,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 3191 transitions, 17682 flow [2022-11-16 11:44:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-16 11:44:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2022-11-16 11:44:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 22379 transitions. [2022-11-16 11:44:33,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43755132366167443 [2022-11-16 11:44:33,030 INFO L72 ComplementDD]: Start complementDD. Operand 214 states and 22379 transitions. [2022-11-16 11:44:33,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 214 states and 22379 transitions. [2022-11-16 11:44:33,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:33,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 214 states and 22379 transitions. [2022-11-16 11:44:33,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 215 states, 214 states have (on average 104.57476635514018) internal successors, (22379), 214 states have internal predecessors, (22379), 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) [2022-11-16 11:44:33,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 215 states, 215 states have (on average 239.0) internal successors, (51385), 215 states have internal predecessors, (51385), 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) [2022-11-16 11:44:33,449 INFO L81 ComplementDD]: Finished complementDD. Result has 215 states, 215 states have (on average 239.0) internal successors, (51385), 215 states have internal predecessors, (51385), 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) [2022-11-16 11:44:33,454 INFO L175 Difference]: Start difference. First operand has 270 places, 243 transitions, 932 flow. Second operand 214 states and 22379 transitions. [2022-11-16 11:44:33,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 3191 transitions, 17682 flow [2022-11-16 11:44:34,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 3191 transitions, 16796 flow, removed 324 selfloop flow, removed 7 redundant places. [2022-11-16 11:44:34,134 INFO L231 Difference]: Finished difference. Result has 612 places, 853 transitions, 6486 flow [2022-11-16 11:44:34,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=214, PETRI_FLOW=6486, PETRI_PLACES=612, PETRI_TRANSITIONS=853} [2022-11-16 11:44:34,135 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 398 predicate places. [2022-11-16 11:44:34,135 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 853 transitions, 6486 flow [2022-11-16 11:44:34,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 96.63888888888889) internal successors, (3479), 36 states have internal predecessors, (3479), 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) [2022-11-16 11:44:34,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:34,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:34,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:44:34,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:44:34,352 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1776730882, now seen corresponding path program 2 times [2022-11-16 11:44:34,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:34,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412388913] [2022-11-16 11:44:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:34,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:34,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:34,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412388913] [2022-11-16 11:44:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412388913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:34,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:44:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868341359] [2022-11-16 11:44:34,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:44:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:44:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:44:34,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 239 [2022-11-16 11:44:34,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 853 transitions, 6486 flow. Second operand has 9 states, 9 states have (on average 192.11111111111111) internal successors, (1729), 9 states have internal predecessors, (1729), 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) [2022-11-16 11:44:34,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:34,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 239 [2022-11-16 11:44:34,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:38,937 INFO L130 PetriNetUnfolder]: 1989/9771 cut-off events. [2022-11-16 11:44:38,937 INFO L131 PetriNetUnfolder]: For 85649/85938 co-relation queries the response was YES. [2022-11-16 11:44:39,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35061 conditions, 9771 events. 1989/9771 cut-off events. For 85649/85938 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 104043 event pairs, 336 based on Foata normal form. 171/9635 useless extension candidates. Maximal degree in co-relation 34891. Up to 1332 conditions per place. [2022-11-16 11:44:39,204 INFO L137 encePairwiseOnDemand]: 225/239 looper letters, 127 selfloop transitions, 75 changer transitions 0/935 dead transitions. [2022-11-16 11:44:39,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 935 transitions, 7685 flow [2022-11-16 11:44:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:44:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:44:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2189 transitions. [2022-11-16 11:44:39,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8326359832635983 [2022-11-16 11:44:39,210 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2189 transitions. [2022-11-16 11:44:39,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2189 transitions. [2022-11-16 11:44:39,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:39,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2189 transitions. [2022-11-16 11:44:39,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 199.0) internal successors, (2189), 11 states have internal predecessors, (2189), 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) [2022-11-16 11:44:39,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 239.0) internal successors, (2868), 12 states have internal predecessors, (2868), 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) [2022-11-16 11:44:39,222 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 239.0) internal successors, (2868), 12 states have internal predecessors, (2868), 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) [2022-11-16 11:44:39,222 INFO L175 Difference]: Start difference. First operand has 612 places, 853 transitions, 6486 flow. Second operand 11 states and 2189 transitions. [2022-11-16 11:44:39,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 935 transitions, 7685 flow [2022-11-16 11:44:40,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 935 transitions, 7407 flow, removed 133 selfloop flow, removed 19 redundant places. [2022-11-16 11:44:40,129 INFO L231 Difference]: Finished difference. Result has 552 places, 869 transitions, 6775 flow [2022-11-16 11:44:40,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=6300, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6775, PETRI_PLACES=552, PETRI_TRANSITIONS=869} [2022-11-16 11:44:40,131 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 338 predicate places. [2022-11-16 11:44:40,131 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 869 transitions, 6775 flow [2022-11-16 11:44:40,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 192.11111111111111) internal successors, (1729), 9 states have internal predecessors, (1729), 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) [2022-11-16 11:44:40,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:40,132 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:40,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:44:40,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:40,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1913211792, now seen corresponding path program 3 times [2022-11-16 11:44:40,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:40,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961041998] [2022-11-16 11:44:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:40,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:40,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:40,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961041998] [2022-11-16 11:44:40,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961041998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:40,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:40,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:44:40,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852931289] [2022-11-16 11:44:40,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:40,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:44:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:44:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:44:40,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 239 [2022-11-16 11:44:40,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 869 transitions, 6775 flow. Second operand has 9 states, 9 states have (on average 192.11111111111111) internal successors, (1729), 9 states have internal predecessors, (1729), 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) [2022-11-16 11:44:40,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:40,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 239 [2022-11-16 11:44:40,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:44,657 INFO L130 PetriNetUnfolder]: 1963/9564 cut-off events. [2022-11-16 11:44:44,657 INFO L131 PetriNetUnfolder]: For 76009/76302 co-relation queries the response was YES. [2022-11-16 11:44:44,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34834 conditions, 9564 events. 1963/9564 cut-off events. For 76009/76302 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 101738 event pairs, 329 based on Foata normal form. 131/9403 useless extension candidates. Maximal degree in co-relation 34667. Up to 1252 conditions per place. [2022-11-16 11:44:45,027 INFO L137 encePairwiseOnDemand]: 224/239 looper letters, 101 selfloop transitions, 117 changer transitions 0/951 dead transitions. [2022-11-16 11:44:45,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 951 transitions, 8067 flow [2022-11-16 11:44:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:44:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:44:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2552 transitions. [2022-11-16 11:44:45,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8213710975217251 [2022-11-16 11:44:45,039 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2552 transitions. [2022-11-16 11:44:45,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2552 transitions. [2022-11-16 11:44:45,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:45,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2552 transitions. [2022-11-16 11:44:45,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 196.30769230769232) internal successors, (2552), 13 states have internal predecessors, (2552), 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) [2022-11-16 11:44:45,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 239.0) internal successors, (3346), 14 states have internal predecessors, (3346), 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) [2022-11-16 11:44:45,058 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 239.0) internal successors, (3346), 14 states have internal predecessors, (3346), 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) [2022-11-16 11:44:45,059 INFO L175 Difference]: Start difference. First operand has 552 places, 869 transitions, 6775 flow. Second operand 13 states and 2552 transitions. [2022-11-16 11:44:45,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 951 transitions, 8067 flow [2022-11-16 11:44:45,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 951 transitions, 8059 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:45,828 INFO L231 Difference]: Finished difference. Result has 571 places, 898 transitions, 7568 flow [2022-11-16 11:44:45,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=6771, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7568, PETRI_PLACES=571, PETRI_TRANSITIONS=898} [2022-11-16 11:44:45,830 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, 357 predicate places. [2022-11-16 11:44:45,830 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 898 transitions, 7568 flow [2022-11-16 11:44:45,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 192.11111111111111) internal successors, (1729), 9 states have internal predecessors, (1729), 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) [2022-11-16 11:44:45,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:45,831 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:45,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:44:45,832 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash -864739324, now seen corresponding path program 4 times [2022-11-16 11:44:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:45,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336975575] [2022-11-16 11:44:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:46,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:46,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336975575] [2022-11-16 11:44:46,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336975575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:46,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510630963] [2022-11-16 11:44:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:44:46,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:46,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:46,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad2997b-238a-4a9d-9fd6-a53241716600/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:44:46,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:44:46,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:44:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:44:46,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:47,418 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 11:44:47,419 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 19 treesize of output 10 [2022-11-16 11:44:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:47,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:47,873 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 11:44:47,873 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 19 treesize of output 11 [2022-11-16 11:44:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:49,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510630963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:49,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:49,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 18] total 35 [2022-11-16 11:44:49,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601429541] [2022-11-16 11:44:49,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:49,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:44:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:44:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:44:49,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 239 [2022-11-16 11:44:49,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 898 transitions, 7568 flow. Second operand has 35 states, 35 states have (on average 96.8) internal successors, (3388), 35 states have internal predecessors, (3388), 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) [2022-11-16 11:44:49,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:49,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 239 [2022-11-16 11:44:49,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand