./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc --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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:54:10,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:54:10,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:54:10,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:54:10,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:54:10,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:54:10,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:54:10,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:54:10,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:54:10,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:54:10,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:54:10,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:54:10,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:54:10,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:54:10,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:54:10,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:54:10,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:54:10,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:54:10,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:54:10,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:54:10,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:54:10,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:54:10,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:54:10,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:54:10,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:54:10,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:54:10,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:54:10,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:54:10,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:54:10,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:54:10,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:54:10,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:54:10,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:54:10,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:54:10,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:54:10,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:54:10,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:54:10,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:54:10,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:54:10,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:54:10,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:54:10,985 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:54:11,022 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:54:11,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:54:11,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:54:11,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:54:11,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:54:11,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:54:11,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:54:11,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:54:11,026 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:54:11,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:54:11,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:54:11,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:54:11,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:54:11,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:54:11,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:54:11,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:54:11,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:54:11,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:54:11,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:54:11,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:54:11,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:54:11,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:54:11,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:54:11,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:54:11,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:54:11,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:54:11,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:54:11,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:54:11,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:54:11,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:54:11,032 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:54:11,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:54:11,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:54:11,032 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_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-02 20:54:11,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:54:11,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:54:11,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:54:11,335 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:54:11,335 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:54:11,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-02 20:54:11,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/data/be3fc56e2/6de6e8054f9c40c885f9608e22999a1c/FLAGa9c298ddc [2022-11-02 20:54:11,885 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:54:11,886 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-02 20:54:11,893 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/data/be3fc56e2/6de6e8054f9c40c885f9608e22999a1c/FLAGa9c298ddc [2022-11-02 20:54:12,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/data/be3fc56e2/6de6e8054f9c40c885f9608e22999a1c [2022-11-02 20:54:12,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:54:12,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:54:12,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:54:12,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:54:12,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:54:12,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb21e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12, skipping insertion in model container [2022-11-02 20:54:12,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:54:12,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:54:12,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-02 20:54:12,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:54:12,528 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:54:12,551 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-02 20:54:12,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:54:12,568 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:54:12,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12 WrapperNode [2022-11-02 20:54:12,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:54:12,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:54:12,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:54:12,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:54:12,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,611 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2022-11-02 20:54:12,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:54:12,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:54:12,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:54:12,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:54:12,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,640 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:54:12,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:54:12,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:54:12,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:54:12,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (1/1) ... [2022-11-02 20:54:12,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:54:12,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:12,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:54:12,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:54:12,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:54:12,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:54:12,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:54:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:54:12,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:54:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 20:54:12,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 20:54:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:54:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:54:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:54:12,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:54:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:54:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:54:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:54:12,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:54:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:54:12,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:54:12,725 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:54:12,879 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:54:12,881 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:54:13,284 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:54:13,386 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:54:13,386 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:54:13,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:54:13 BoogieIcfgContainer [2022-11-02 20:54:13,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:54:13,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:54:13,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:54:13,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:54:13,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:54:12" (1/3) ... [2022-11-02 20:54:13,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352bbff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:54:13, skipping insertion in model container [2022-11-02 20:54:13,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:12" (2/3) ... [2022-11-02 20:54:13,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352bbff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:54:13, skipping insertion in model container [2022-11-02 20:54:13,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:54:13" (3/3) ... [2022-11-02 20:54:13,407 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2022-11-02 20:54:13,420 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:54:13,431 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:54:13,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:54:13,431 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:54:13,521 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:54:13,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 153 transitions, 330 flow [2022-11-02 20:54:13,695 INFO L130 PetriNetUnfolder]: 12/150 cut-off events. [2022-11-02 20:54:13,696 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:54:13,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-11-02 20:54:13,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 153 transitions, 330 flow [2022-11-02 20:54:13,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 139 transitions, 296 flow [2022-11-02 20:54:13,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:54:13,743 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;@186c2f51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:54:13,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:54:13,812 INFO L130 PetriNetUnfolder]: 12/138 cut-off events. [2022-11-02 20:54:13,812 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:54:13,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:13,813 INFO L208 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] [2022-11-02 20:54:13,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:54:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1383607487, now seen corresponding path program 1 times [2022-11-02 20:54:13,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:13,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528010949] [2022-11-02 20:54:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:13,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:14,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:14,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528010949] [2022-11-02 20:54:14,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528010949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:14,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:14,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:54:14,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853139914] [2022-11-02 20:54:14,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:14,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:54:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:54:14,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:54:14,213 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 153 [2022-11-02 20:54:14,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 138.5) internal successors, (277), 2 states have internal predecessors, (277), 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) [2022-11-02 20:54:14,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:14,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 153 [2022-11-02 20:54:14,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:14,329 INFO L130 PetriNetUnfolder]: 41/264 cut-off events. [2022-11-02 20:54:14,329 INFO L131 PetriNetUnfolder]: For 49/50 co-relation queries the response was YES. [2022-11-02 20:54:14,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 264 events. 41/264 cut-off events. For 49/50 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 719 event pairs, 15 based on Foata normal form. 42/275 useless extension candidates. Maximal degree in co-relation 216. Up to 59 conditions per place. [2022-11-02 20:54:14,333 INFO L137 encePairwiseOnDemand]: 145/153 looper letters, 9 selfloop transitions, 0 changer transitions 4/131 dead transitions. [2022-11-02 20:54:14,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 131 transitions, 298 flow [2022-11-02 20:54:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:54:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:54:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 287 transitions. [2022-11-02 20:54:14,356 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9379084967320261 [2022-11-02 20:54:14,357 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 287 transitions. [2022-11-02 20:54:14,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 287 transitions. [2022-11-02 20:54:14,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:14,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 287 transitions. [2022-11-02 20:54:14,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 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) [2022-11-02 20:54:14,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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) [2022-11-02 20:54:14,379 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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) [2022-11-02 20:54:14,381 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 296 flow. Second operand 2 states and 287 transitions. [2022-11-02 20:54:14,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 131 transitions, 298 flow [2022-11-02 20:54:14,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 131 transitions, 286 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 20:54:14,390 INFO L231 Difference]: Finished difference. Result has 132 places, 127 transitions, 260 flow [2022-11-02 20:54:14,392 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=260, PETRI_PLACES=132, PETRI_TRANSITIONS=127} [2022-11-02 20:54:14,399 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, -5 predicate places. [2022-11-02 20:54:14,399 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 127 transitions, 260 flow [2022-11-02 20:54:14,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 138.5) internal successors, (277), 2 states have internal predecessors, (277), 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) [2022-11-02 20:54:14,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:14,401 INFO L208 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] [2022-11-02 20:54:14,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:54:14,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:54:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 563593522, now seen corresponding path program 1 times [2022-11-02 20:54:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014818088] [2022-11-02 20:54:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:15,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:15,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014818088] [2022-11-02 20:54:15,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014818088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:15,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:15,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:54:15,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986302248] [2022-11-02 20:54:15,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:15,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:54:15,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:15,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:54:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:54:15,167 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 153 [2022-11-02 20:54:15,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 127 transitions, 260 flow. Second operand has 8 states, 8 states have (on average 98.5) internal successors, (788), 8 states have internal predecessors, (788), 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) [2022-11-02 20:54:15,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:15,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 153 [2022-11-02 20:54:15,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:15,619 INFO L130 PetriNetUnfolder]: 295/678 cut-off events. [2022-11-02 20:54:15,619 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-02 20:54:15,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 678 events. 295/678 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2964 event pairs, 167 based on Foata normal form. 1/510 useless extension candidates. Maximal degree in co-relation 1134. Up to 421 conditions per place. [2022-11-02 20:54:15,629 INFO L137 encePairwiseOnDemand]: 143/153 looper letters, 44 selfloop transitions, 6 changer transitions 4/135 dead transitions. [2022-11-02 20:54:15,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 135 transitions, 384 flow [2022-11-02 20:54:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:54:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:54:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 901 transitions. [2022-11-02 20:54:15,635 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.654320987654321 [2022-11-02 20:54:15,635 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 901 transitions. [2022-11-02 20:54:15,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 901 transitions. [2022-11-02 20:54:15,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:15,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 901 transitions. [2022-11-02 20:54:15,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.11111111111111) internal successors, (901), 9 states have internal predecessors, (901), 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) [2022-11-02 20:54:15,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 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) [2022-11-02 20:54:15,645 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 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) [2022-11-02 20:54:15,646 INFO L175 Difference]: Start difference. First operand has 132 places, 127 transitions, 260 flow. Second operand 9 states and 901 transitions. [2022-11-02 20:54:15,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 135 transitions, 384 flow [2022-11-02 20:54:15,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 135 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:54:15,651 INFO L231 Difference]: Finished difference. Result has 140 places, 128 transitions, 286 flow [2022-11-02 20:54:15,651 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=286, PETRI_PLACES=140, PETRI_TRANSITIONS=128} [2022-11-02 20:54:15,652 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, 3 predicate places. [2022-11-02 20:54:15,652 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 128 transitions, 286 flow [2022-11-02 20:54:15,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.5) internal successors, (788), 8 states have internal predecessors, (788), 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) [2022-11-02 20:54:15,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:15,654 INFO L208 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] [2022-11-02 20:54:15,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:54:15,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:54:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1756520908, now seen corresponding path program 1 times [2022-11-02 20:54:15,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:15,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277235101] [2022-11-02 20:54:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:15,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:16,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:16,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277235101] [2022-11-02 20:54:16,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277235101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117696146] [2022-11-02 20:54:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:16,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:16,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:16,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:16,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:54:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:16,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:54:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:16,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:16,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117696146] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:16,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:16,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-11-02 20:54:16,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133375714] [2022-11-02 20:54:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:16,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:54:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:16,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:54:16,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:54:16,593 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 153 [2022-11-02 20:54:16,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 128 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 116.42857142857143) internal successors, (815), 7 states have internal predecessors, (815), 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) [2022-11-02 20:54:16,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:16,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 153 [2022-11-02 20:54:16,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:16,867 INFO L130 PetriNetUnfolder]: 182/617 cut-off events. [2022-11-02 20:54:16,868 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-02 20:54:16,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 617 events. 182/617 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3091 event pairs, 80 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 934. Up to 141 conditions per place. [2022-11-02 20:54:16,875 INFO L137 encePairwiseOnDemand]: 145/153 looper letters, 33 selfloop transitions, 7 changer transitions 0/136 dead transitions. [2022-11-02 20:54:16,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 136 transitions, 384 flow [2022-11-02 20:54:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:54:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:54:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 831 transitions. [2022-11-02 20:54:16,878 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7759103641456583 [2022-11-02 20:54:16,878 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 831 transitions. [2022-11-02 20:54:16,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 831 transitions. [2022-11-02 20:54:16,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:16,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 831 transitions. [2022-11-02 20:54:16,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.71428571428571) internal successors, (831), 7 states have internal predecessors, (831), 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) [2022-11-02 20:54:16,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 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) [2022-11-02 20:54:16,884 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 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) [2022-11-02 20:54:16,884 INFO L175 Difference]: Start difference. First operand has 140 places, 128 transitions, 286 flow. Second operand 7 states and 831 transitions. [2022-11-02 20:54:16,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 136 transitions, 384 flow [2022-11-02 20:54:16,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 136 transitions, 368 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-02 20:54:16,890 INFO L231 Difference]: Finished difference. Result has 139 places, 130 transitions, 303 flow [2022-11-02 20:54:16,891 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=139, PETRI_TRANSITIONS=130} [2022-11-02 20:54:16,893 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, 2 predicate places. [2022-11-02 20:54:16,893 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 130 transitions, 303 flow [2022-11-02 20:54:16,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.42857142857143) internal successors, (815), 7 states have internal predecessors, (815), 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) [2022-11-02 20:54:16,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:16,894 INFO L208 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] [2022-11-02 20:54:16,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:17,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:17,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:54:17,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2075870533, now seen corresponding path program 1 times [2022-11-02 20:54:17,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:17,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000661729] [2022-11-02 20:54:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:17,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:17,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000661729] [2022-11-02 20:54:17,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000661729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918153395] [2022-11-02 20:54:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:17,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:17,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:17,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:17,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:54:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:17,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:54:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:17,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:18,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918153395] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:18,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:54:18,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 19 [2022-11-02 20:54:18,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070671002] [2022-11-02 20:54:18,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:18,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:54:18,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:18,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:54:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:54:18,084 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 153 [2022-11-02 20:54:18,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 130 transitions, 303 flow. Second operand has 9 states, 9 states have (on average 109.33333333333333) internal successors, (984), 9 states have internal predecessors, (984), 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) [2022-11-02 20:54:18,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:18,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 153 [2022-11-02 20:54:18,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:18,605 INFO L130 PetriNetUnfolder]: 781/1621 cut-off events. [2022-11-02 20:54:18,606 INFO L131 PetriNetUnfolder]: For 515/748 co-relation queries the response was YES. [2022-11-02 20:54:18,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3224 conditions, 1621 events. 781/1621 cut-off events. For 515/748 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9430 event pairs, 132 based on Foata normal form. 233/1656 useless extension candidates. Maximal degree in co-relation 3216. Up to 406 conditions per place. [2022-11-02 20:54:18,619 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 76 selfloop transitions, 18 changer transitions 0/183 dead transitions. [2022-11-02 20:54:18,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 183 transitions, 638 flow [2022-11-02 20:54:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:54:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:54:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1149 transitions. [2022-11-02 20:54:18,622 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7509803921568627 [2022-11-02 20:54:18,622 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1149 transitions. [2022-11-02 20:54:18,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1149 transitions. [2022-11-02 20:54:18,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:18,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1149 transitions. [2022-11-02 20:54:18,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.9) internal successors, (1149), 10 states have internal predecessors, (1149), 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) [2022-11-02 20:54:18,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 153.0) internal successors, (1683), 11 states have internal predecessors, (1683), 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) [2022-11-02 20:54:18,630 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 153.0) internal successors, (1683), 11 states have internal predecessors, (1683), 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) [2022-11-02 20:54:18,630 INFO L175 Difference]: Start difference. First operand has 139 places, 130 transitions, 303 flow. Second operand 10 states and 1149 transitions. [2022-11-02 20:54:18,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 183 transitions, 638 flow [2022-11-02 20:54:18,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 183 transitions, 626 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:54:18,638 INFO L231 Difference]: Finished difference. Result has 149 places, 142 transitions, 403 flow [2022-11-02 20:54:18,638 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=403, PETRI_PLACES=149, PETRI_TRANSITIONS=142} [2022-11-02 20:54:18,640 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, 12 predicate places. [2022-11-02 20:54:18,640 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 142 transitions, 403 flow [2022-11-02 20:54:18,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 109.33333333333333) internal successors, (984), 9 states have internal predecessors, (984), 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) [2022-11-02 20:54:18,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:18,641 INFO L208 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] [2022-11-02 20:54:18,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:18,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:18,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:54:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:18,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2126786139, now seen corresponding path program 2 times [2022-11-02 20:54:18,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:18,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748628368] [2022-11-02 20:54:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:18,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:54:19,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748628368] [2022-11-02 20:54:19,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748628368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:19,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570490354] [2022-11-02 20:54:19,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:19,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:19,076 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:19,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:54:19,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:54:19,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:19,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:54:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:54:19,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:19,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570490354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:19,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:19,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-02 20:54:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279020400] [2022-11-02 20:54:19,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:19,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:54:19,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:19,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:54:19,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:54:19,476 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 153 [2022-11-02 20:54:19,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 142 transitions, 403 flow. Second operand has 6 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 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) [2022-11-02 20:54:19,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:19,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 153 [2022-11-02 20:54:19,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:19,838 INFO L130 PetriNetUnfolder]: 498/1042 cut-off events. [2022-11-02 20:54:19,838 INFO L131 PetriNetUnfolder]: For 934/1078 co-relation queries the response was YES. [2022-11-02 20:54:19,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 1042 events. 498/1042 cut-off events. For 934/1078 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5174 event pairs, 136 based on Foata normal form. 164/1170 useless extension candidates. Maximal degree in co-relation 2667. Up to 421 conditions per place. [2022-11-02 20:54:19,850 INFO L137 encePairwiseOnDemand]: 144/153 looper letters, 47 selfloop transitions, 10 changer transitions 0/150 dead transitions. [2022-11-02 20:54:19,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 150 transitions, 544 flow [2022-11-02 20:54:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:54:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:54:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 857 transitions. [2022-11-02 20:54:19,853 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7001633986928104 [2022-11-02 20:54:19,853 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 857 transitions. [2022-11-02 20:54:19,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 857 transitions. [2022-11-02 20:54:19,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:19,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 857 transitions. [2022-11-02 20:54:19,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.125) internal successors, (857), 8 states have internal predecessors, (857), 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) [2022-11-02 20:54:19,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 153.0) internal successors, (1377), 9 states have internal predecessors, (1377), 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) [2022-11-02 20:54:19,859 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 153.0) internal successors, (1377), 9 states have internal predecessors, (1377), 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) [2022-11-02 20:54:19,859 INFO L175 Difference]: Start difference. First operand has 149 places, 142 transitions, 403 flow. Second operand 8 states and 857 transitions. [2022-11-02 20:54:19,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 150 transitions, 544 flow [2022-11-02 20:54:19,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 150 transitions, 537 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:54:19,868 INFO L231 Difference]: Finished difference. Result has 153 places, 142 transitions, 423 flow [2022-11-02 20:54:19,869 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=423, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2022-11-02 20:54:19,870 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, 16 predicate places. [2022-11-02 20:54:19,870 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 423 flow [2022-11-02 20:54:19,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 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) [2022-11-02 20:54:19,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:19,871 INFO L208 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] [2022-11-02 20:54:19,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:20,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:20,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:54:20,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:20,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1498983716, now seen corresponding path program 1 times [2022-11-02 20:54:20,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:20,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956518482] [2022-11-02 20:54:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:20,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:21,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:21,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956518482] [2022-11-02 20:54:21,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956518482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:21,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559715481] [2022-11-02 20:54:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:21,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:21,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:21,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:54:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:54:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:23,355 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:23,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 63 treesize of output 43 [2022-11-02 20:54:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:24,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:24,834 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:24,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 93 [2022-11-02 20:54:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:26,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559715481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:26,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:26,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 20] total 46 [2022-11-02 20:54:26,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234310163] [2022-11-02 20:54:26,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:26,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:54:26,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:54:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:54:26,296 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 153 [2022-11-02 20:54:26,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 423 flow. Second operand has 46 states, 46 states have (on average 75.0) internal successors, (3450), 46 states have internal predecessors, (3450), 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) [2022-11-02 20:54:26,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:26,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 153 [2022-11-02 20:54:26,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:30,643 INFO L130 PetriNetUnfolder]: 2842/5579 cut-off events. [2022-11-02 20:54:30,643 INFO L131 PetriNetUnfolder]: For 6247/6331 co-relation queries the response was YES. [2022-11-02 20:54:30,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14081 conditions, 5579 events. 2842/5579 cut-off events. For 6247/6331 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41900 event pairs, 245 based on Foata normal form. 14/5490 useless extension candidates. Maximal degree in co-relation 14067. Up to 1724 conditions per place. [2022-11-02 20:54:30,702 INFO L137 encePairwiseOnDemand]: 121/153 looper letters, 204 selfloop transitions, 96 changer transitions 6/371 dead transitions. [2022-11-02 20:54:30,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 371 transitions, 1875 flow [2022-11-02 20:54:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:54:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-02 20:54:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3011 transitions. [2022-11-02 20:54:30,710 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5178878568971448 [2022-11-02 20:54:30,711 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3011 transitions. [2022-11-02 20:54:30,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3011 transitions. [2022-11-02 20:54:30,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:30,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3011 transitions. [2022-11-02 20:54:30,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 79.23684210526316) internal successors, (3011), 38 states have internal predecessors, (3011), 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) [2022-11-02 20:54:30,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 153.0) internal successors, (5967), 39 states have internal predecessors, (5967), 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) [2022-11-02 20:54:30,731 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 153.0) internal successors, (5967), 39 states have internal predecessors, (5967), 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) [2022-11-02 20:54:30,731 INFO L175 Difference]: Start difference. First operand has 153 places, 142 transitions, 423 flow. Second operand 38 states and 3011 transitions. [2022-11-02 20:54:30,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 371 transitions, 1875 flow [2022-11-02 20:54:30,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 371 transitions, 1804 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-02 20:54:30,772 INFO L231 Difference]: Finished difference. Result has 202 places, 229 transitions, 1019 flow [2022-11-02 20:54:30,772 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1019, PETRI_PLACES=202, PETRI_TRANSITIONS=229} [2022-11-02 20:54:30,773 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, 65 predicate places. [2022-11-02 20:54:30,773 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 229 transitions, 1019 flow [2022-11-02 20:54:30,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 75.0) internal successors, (3450), 46 states have internal predecessors, (3450), 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) [2022-11-02 20:54:30,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:30,775 INFO L208 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] [2022-11-02 20:54:30,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-02 20:54:31,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:31,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:54:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash -507609156, now seen corresponding path program 2 times [2022-11-02 20:54:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:31,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698316492] [2022-11-02 20:54:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:32,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698316492] [2022-11-02 20:54:32,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698316492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477415172] [2022-11-02 20:54:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:32,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:32,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:32,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:32,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:54:33,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:33,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 20:54:33,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:34,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-02 20:54:34,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:34,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 63 treesize of output 43 [2022-11-02 20:54:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:35,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:36,506 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_189 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_189) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (not (< .cse0 c_~min2~0)) (< 0 ~M~0) (= .cse0 c_~min1~0) (< (+ ~M~0 1) c_~N~0)))) (or (= c_~min2~0 c_~min1~0) (forall ((~M~0 Int) (v_ArrVal_189 (Array Int Int))) (or (< 0 ~M~0) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_189) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~min2~0) (< (+ ~M~0 1) c_~N~0))))) is different from false [2022-11-02 20:54:36,736 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:36,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 147 [2022-11-02 20:54:36,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 82 [2022-11-02 20:54:36,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2022-11-02 20:54:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-02 20:54:39,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477415172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:39,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:39,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 25] total 68 [2022-11-02 20:54:39,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427254261] [2022-11-02 20:54:39,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-02 20:54:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-02 20:54:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=3878, Unknown=1, NotChecked=130, Total=4556 [2022-11-02 20:54:39,260 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 153 [2022-11-02 20:54:39,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 229 transitions, 1019 flow. Second operand has 68 states, 68 states have (on average 56.970588235294116) internal successors, (3874), 68 states have internal predecessors, (3874), 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) [2022-11-02 20:54:39,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:39,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 153 [2022-11-02 20:54:39,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:54,364 INFO L130 PetriNetUnfolder]: 13588/21536 cut-off events. [2022-11-02 20:54:54,364 INFO L131 PetriNetUnfolder]: For 30032/30181 co-relation queries the response was YES. [2022-11-02 20:54:54,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67996 conditions, 21536 events. 13588/21536 cut-off events. For 30032/30181 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 160668 event pairs, 964 based on Foata normal form. 15/21436 useless extension candidates. Maximal degree in co-relation 67965. Up to 5377 conditions per place. [2022-11-02 20:54:54,693 INFO L137 encePairwiseOnDemand]: 115/153 looper letters, 610 selfloop transitions, 435 changer transitions 12/1102 dead transitions. [2022-11-02 20:54:54,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1102 transitions, 7204 flow [2022-11-02 20:54:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-02 20:54:54,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-02 20:54:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5459 transitions. [2022-11-02 20:54:54,709 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4148806809545524 [2022-11-02 20:54:54,709 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5459 transitions. [2022-11-02 20:54:54,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5459 transitions. [2022-11-02 20:54:54,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:54,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5459 transitions. [2022-11-02 20:54:54,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 63.47674418604651) internal successors, (5459), 86 states have internal predecessors, (5459), 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) [2022-11-02 20:54:54,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 153.0) internal successors, (13311), 87 states have internal predecessors, (13311), 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) [2022-11-02 20:54:54,751 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 153.0) internal successors, (13311), 87 states have internal predecessors, (13311), 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) [2022-11-02 20:54:54,752 INFO L175 Difference]: Start difference. First operand has 202 places, 229 transitions, 1019 flow. Second operand 86 states and 5459 transitions. [2022-11-02 20:54:54,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1102 transitions, 7204 flow [2022-11-02 20:54:54,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1102 transitions, 7166 flow, removed 11 selfloop flow, removed 10 redundant places. [2022-11-02 20:54:55,012 INFO L231 Difference]: Finished difference. Result has 306 places, 594 transitions, 4358 flow [2022-11-02 20:54:55,012 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=4358, PETRI_PLACES=306, PETRI_TRANSITIONS=594} [2022-11-02 20:54:55,013 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, 169 predicate places. [2022-11-02 20:54:55,013 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 594 transitions, 4358 flow [2022-11-02 20:54:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 56.970588235294116) internal successors, (3874), 68 states have internal predecessors, (3874), 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) [2022-11-02 20:54:55,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:55,016 INFO L208 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] [2022-11-02 20:54:55,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:55,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:54:55,221 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:54:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1667020392, now seen corresponding path program 3 times [2022-11-02 20:54:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:55,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647089814] [2022-11-02 20:54:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:57,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:57,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647089814] [2022-11-02 20:54:57,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647089814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:57,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819588751] [2022-11-02 20:54:57,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:54:57,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:57,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:57,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:57,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:54:57,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:54:57,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:57,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 20:54:57,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:57,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:54:57,961 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:54:57,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-02 20:54:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:58,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-02 20:54:59,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-02 20:54:59,522 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:54:59,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 69 treesize of output 43 [2022-11-02 20:55:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:55:00,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:00,906 WARN L833 $PredicateComparison]: unable to prove that (and (or (= c_~min2~0 c_~min1~0) (forall ((~M~0 Int) (v_ArrVal_224 (Array Int Int))) (or (<= (+ 2 ~M~0) c_~N~0) (< 0 ~M~0) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_224) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~min2~0)))) (forall ((~M~0 Int) (v_ArrVal_224 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_224) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (<= (+ 2 ~M~0) c_~N~0) (not (< .cse0 c_~min2~0)) (< 0 ~M~0) (= c_~min1~0 .cse0))))) is different from false [2022-11-02 20:55:01,126 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_223 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_224) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (<= (+ 2 ~M~0) c_~N~0) (< 0 ~M~0) (= c_~min1~0 .cse0) (not (< .cse0 c_~min2~0))))) (or (= c_~min2~0 c_~min1~0) (forall ((~M~0 Int) (v_ArrVal_223 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (or (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_224) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~min2~0) (<= (+ 2 ~M~0) c_~N~0) (< 0 ~M~0))))) is different from false [2022-11-02 20:55:01,385 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:01,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 513 treesize of output 477 [2022-11-02 20:55:01,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 418 treesize of output 406 [2022-11-02 20:55:01,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 406 treesize of output 382 [2022-11-02 20:55:01,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 382 treesize of output 334 [2022-11-02 20:55:01,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 310 [2022-11-02 20:55:04,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:55:04,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:55:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-02 20:55:04,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819588751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:04,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:04,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 24] total 63 [2022-11-02 20:55:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525493794] [2022-11-02 20:55:04,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:04,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-02 20:55:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:04,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-02 20:55:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3262, Unknown=2, NotChecked=238, Total=3906 [2022-11-02 20:55:04,711 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 153 [2022-11-02 20:55:04,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 594 transitions, 4358 flow. Second operand has 63 states, 63 states have (on average 56.111111111111114) internal successors, (3535), 63 states have internal predecessors, (3535), 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) [2022-11-02 20:55:04,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:55:04,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 153 [2022-11-02 20:55:04,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:55:28,379 INFO L130 PetriNetUnfolder]: 21447/35848 cut-off events. [2022-11-02 20:55:28,379 INFO L131 PetriNetUnfolder]: For 143678/143916 co-relation queries the response was YES. [2022-11-02 20:55:28,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144503 conditions, 35848 events. 21447/35848 cut-off events. For 143678/143916 co-relation queries the response was YES. Maximal size of possible extension queue 1926. Compared 307580 event pairs, 1891 based on Foata normal form. 27/35645 useless extension candidates. Maximal degree in co-relation 144443. Up to 10357 conditions per place. [2022-11-02 20:55:29,236 INFO L137 encePairwiseOnDemand]: 113/153 looper letters, 868 selfloop transitions, 1016 changer transitions 15/1944 dead transitions. [2022-11-02 20:55:29,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1944 transitions, 17636 flow [2022-11-02 20:55:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-02 20:55:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-02 20:55:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5737 transitions. [2022-11-02 20:55:29,264 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4031906669477827 [2022-11-02 20:55:29,264 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5737 transitions. [2022-11-02 20:55:29,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5737 transitions. [2022-11-02 20:55:29,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:55:29,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5737 transitions. [2022-11-02 20:55:29,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 61.68817204301075) internal successors, (5737), 93 states have internal predecessors, (5737), 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) [2022-11-02 20:55:29,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 153.0) internal successors, (14382), 94 states have internal predecessors, (14382), 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) [2022-11-02 20:55:29,309 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 153.0) internal successors, (14382), 94 states have internal predecessors, (14382), 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) [2022-11-02 20:55:29,309 INFO L175 Difference]: Start difference. First operand has 306 places, 594 transitions, 4358 flow. Second operand 93 states and 5737 transitions. [2022-11-02 20:55:29,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1944 transitions, 17636 flow [2022-11-02 20:55:31,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1944 transitions, 17112 flow, removed 227 selfloop flow, removed 29 redundant places. [2022-11-02 20:55:31,468 INFO L231 Difference]: Finished difference. Result has 418 places, 1316 transitions, 13703 flow [2022-11-02 20:55:31,470 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=13703, PETRI_PLACES=418, PETRI_TRANSITIONS=1316} [2022-11-02 20:55:31,471 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, 281 predicate places. [2022-11-02 20:55:31,471 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1316 transitions, 13703 flow [2022-11-02 20:55:31,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 56.111111111111114) internal successors, (3535), 63 states have internal predecessors, (3535), 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) [2022-11-02 20:55:31,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:55:31,473 INFO L208 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] [2022-11-02 20:55:31,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:31,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:31,680 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:55:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash -910357514, now seen corresponding path program 4 times [2022-11-02 20:55:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:31,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382269780] [2022-11-02 20:55:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:31,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:34,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382269780] [2022-11-02 20:55:34,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382269780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189215602] [2022-11-02 20:55:34,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:55:34,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:34,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:34,399 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:34,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:55:34,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:55:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:55:34,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:36,141 INFO L356 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-02 20:55:36,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 65 [2022-11-02 20:55:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:36,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:36,743 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:36,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 51 [2022-11-02 20:55:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:37,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189215602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:37,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:37,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22, 21] total 64 [2022-11-02 20:55:37,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757998598] [2022-11-02 20:55:37,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:37,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-02 20:55:37,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:37,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-02 20:55:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=3525, Unknown=0, NotChecked=0, Total=4032 [2022-11-02 20:55:37,986 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 153 [2022-11-02 20:55:37,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1316 transitions, 13703 flow. Second operand has 64 states, 64 states have (on average 58.078125) internal successors, (3717), 64 states have internal predecessors, (3717), 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) [2022-11-02 20:55:37,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:55:37,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 153 [2022-11-02 20:55:37,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:56:04,703 INFO L130 PetriNetUnfolder]: 25015/41794 cut-off events. [2022-11-02 20:56:04,703 INFO L131 PetriNetUnfolder]: For 650093/651571 co-relation queries the response was YES. [2022-11-02 20:56:05,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243036 conditions, 41794 events. 25015/41794 cut-off events. For 650093/651571 co-relation queries the response was YES. Maximal size of possible extension queue 2279. Compared 366344 event pairs, 6227 based on Foata normal form. 51/41377 useless extension candidates. Maximal degree in co-relation 242931. Up to 26815 conditions per place. [2022-11-02 20:56:05,833 INFO L137 encePairwiseOnDemand]: 115/153 looper letters, 1239 selfloop transitions, 673 changer transitions 6/1966 dead transitions. [2022-11-02 20:56:05,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1966 transitions, 24532 flow [2022-11-02 20:56:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-02 20:56:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-02 20:56:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3792 transitions. [2022-11-02 20:56:05,856 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.406300225008036 [2022-11-02 20:56:05,856 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3792 transitions. [2022-11-02 20:56:05,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3792 transitions. [2022-11-02 20:56:05,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:56:05,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3792 transitions. [2022-11-02 20:56:05,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 62.16393442622951) internal successors, (3792), 61 states have internal predecessors, (3792), 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) [2022-11-02 20:56:05,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 153.0) internal successors, (9486), 62 states have internal predecessors, (9486), 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) [2022-11-02 20:56:05,896 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 153.0) internal successors, (9486), 62 states have internal predecessors, (9486), 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) [2022-11-02 20:56:05,897 INFO L175 Difference]: Start difference. First operand has 418 places, 1316 transitions, 13703 flow. Second operand 61 states and 3792 transitions. [2022-11-02 20:56:05,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1966 transitions, 24532 flow [2022-11-02 20:56:24,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1966 transitions, 23974 flow, removed 140 selfloop flow, removed 32 redundant places. [2022-11-02 20:56:24,231 INFO L231 Difference]: Finished difference. Result has 469 places, 1663 transitions, 20174 flow [2022-11-02 20:56:24,232 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=13365, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=20174, PETRI_PLACES=469, PETRI_TRANSITIONS=1663} [2022-11-02 20:56:24,233 INFO L287 CegarLoopForPetriNet]: 137 programPoint places, 332 predicate places. [2022-11-02 20:56:24,233 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1663 transitions, 20174 flow [2022-11-02 20:56:24,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 58.078125) internal successors, (3717), 64 states have internal predecessors, (3717), 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) [2022-11-02 20:56:24,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:56:24,234 INFO L208 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] [2022-11-02 20:56:24,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:24,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:24,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:56:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1485655682, now seen corresponding path program 5 times [2022-11-02 20:56:24,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669603015] [2022-11-02 20:56:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:26,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:26,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669603015] [2022-11-02 20:56:26,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669603015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:26,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385533888] [2022-11-02 20:56:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:56:26,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:26,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:26,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62f6f8da-577b-4204-a8a4-66e994770038/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:56:26,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:56:26,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:26,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:56:26,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:27,586 INFO L356 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-02 20:56:27,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 65 [2022-11-02 20:56:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:56:27,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:28,197 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:28,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 51 [2022-11-02 20:56:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:56:28,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385533888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:28,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:28,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 15] total 46 [2022-11-02 20:56:28,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977725752] [2022-11-02 20:56:28,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:28,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:56:28,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:56:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:56:28,716 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 153 [2022-11-02 20:56:28,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1663 transitions, 20174 flow. Second operand has 46 states, 46 states have (on average 69.02173913043478) internal successors, (3175), 46 states have internal predecessors, (3175), 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) [2022-11-02 20:56:28,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:56:28,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 153 [2022-11-02 20:56:28,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:57:03,022 INFO L130 PetriNetUnfolder]: 27898/46451 cut-off events. [2022-11-02 20:57:03,023 INFO L131 PetriNetUnfolder]: For 945088/946828 co-relation queries the response was YES. [2022-11-02 20:57:04,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302752 conditions, 46451 events. 27898/46451 cut-off events. For 945088/946828 co-relation queries the response was YES. Maximal size of possible extension queue 2520. Compared 412427 event pairs, 5302 based on Foata normal form. 82/46155 useless extension candidates. Maximal degree in co-relation 302624. Up to 26634 conditions per place. [2022-11-02 20:57:04,872 INFO L137 encePairwiseOnDemand]: 117/153 looper letters, 1308 selfloop transitions, 1395 changer transitions 6/2761 dead transitions. [2022-11-02 20:57:04,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 2761 transitions, 39166 flow [2022-11-02 20:57:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-02 20:57:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-11-02 20:57:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6154 transitions. [2022-11-02 20:57:04,884 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.47320261437908495 [2022-11-02 20:57:04,885 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6154 transitions. [2022-11-02 20:57:04,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6154 transitions. [2022-11-02 20:57:04,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:57:04,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6154 transitions. [2022-11-02 20:57:04,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 72.4) internal successors, (6154), 85 states have internal predecessors, (6154), 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) [2022-11-02 20:57:04,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 153.0) internal successors, (13158), 86 states have internal predecessors, (13158), 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) [2022-11-02 20:57:04,923 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 153.0) internal successors, (13158), 86 states have internal predecessors, (13158), 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) [2022-11-02 20:57:04,923 INFO L175 Difference]: Start difference. First operand has 469 places, 1663 transitions, 20174 flow. Second operand 85 states and 6154 transitions. [2022-11-02 20:57:04,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 2761 transitions, 39166 flow