./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R --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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- 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-38b53e6 [2022-11-25 17:59:56,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:59:56,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:59:56,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:59:56,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:59:56,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:59:56,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:59:56,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:59:56,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:59:56,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:59:56,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:59:56,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:59:56,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:59:56,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:59:56,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:59:56,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:59:56,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:59:56,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:59:56,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:59:56,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:59:56,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:59:56,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:59:56,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:59:56,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:59:56,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:59:56,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:59:56,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:59:56,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:59:56,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:59:56,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:59:56,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:59:56,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:59:56,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:59:56,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:59:56,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:59:56,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:59:56,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:59:56,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:59:56,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:59:56,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:59:56,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:59:56,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:59:56,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:59:56,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:59:56,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:59:56,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:59:56,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:59:56,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:59:56,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:59:56,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:59:56,979 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:59:56,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:59:56,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:59:56,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:59:56,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:59:56,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:59:56,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:59:56,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:59:56,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:59:56,982 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:59:56,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:59:56,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:59:56,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:59:56,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:59:56,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:59:56,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:59:56,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:59:56,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:59:56,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:59:56,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:59:56,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:59:56,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:59:56,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:59:56,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:59:56,986 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:59:56,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:59:56,987 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2022-11-25 17:59:57,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:59:57,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:59:57,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:59:57,344 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:59:57,344 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:59:57,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-11-25 18:00:00,444 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:00:00,711 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:00:00,712 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-11-25 18:00:00,719 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/data/4cfa00b0d/5776d381183c4de7975bec19649af688/FLAGecaeb7676 [2022-11-25 18:00:00,735 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/data/4cfa00b0d/5776d381183c4de7975bec19649af688 [2022-11-25 18:00:00,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:00:00,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:00:00,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:00:00,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:00:00,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:00:00,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:00:00" (1/1) ... [2022-11-25 18:00:00,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791dc986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:00, skipping insertion in model container [2022-11-25 18:00:00,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:00:00" (1/1) ... [2022-11-25 18:00:00,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:00:00,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:00:00,979 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-11-25 18:00:00,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:00:01,000 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:00:01,025 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-11-25 18:00:01,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:00:01,043 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:00:01,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01 WrapperNode [2022-11-25 18:00:01,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:00:01,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:00:01,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:00:01,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:00:01,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,092 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-11-25 18:00:01,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:00:01,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:00:01,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:00:01,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:00:01,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,135 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:00:01,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:00:01,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:00:01,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:00:01,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (1/1) ... [2022-11-25 18:00:01,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:00:01,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:00:01,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:00:01,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:00:01,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:00:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:00:01,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:00:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:00:01,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:00:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:00:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:00:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:00:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:00:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:00:01,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:00:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:00:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:00:01,232 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:00:01,354 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:00:01,357 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:00:01,801 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:00:01,811 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:00:01,812 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 18:00:01,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:00:01 BoogieIcfgContainer [2022-11-25 18:00:01,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:00:01,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:00:01,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:00:01,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:00:01,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:00:00" (1/3) ... [2022-11-25 18:00:01,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2c553f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:00:01, skipping insertion in model container [2022-11-25 18:00:01,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:01" (2/3) ... [2022-11-25 18:00:01,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2c553f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:00:01, skipping insertion in model container [2022-11-25 18:00:01,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:00:01" (3/3) ... [2022-11-25 18:00:01,832 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2022-11-25 18:00:01,841 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:00:01,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:00:01,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:00:01,854 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:00:01,951 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:00:02,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 185 transitions, 386 flow [2022-11-25 18:00:02,124 INFO L130 PetriNetUnfolder]: 15/183 cut-off events. [2022-11-25 18:00:02,124 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:00:02,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 15/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-11-25 18:00:02,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 185 transitions, 386 flow [2022-11-25 18:00:02,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 174 transitions, 360 flow [2022-11-25 18:00:02,149 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:00:02,171 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 174 transitions, 360 flow [2022-11-25 18:00:02,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 174 transitions, 360 flow [2022-11-25 18:00:02,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 360 flow [2022-11-25 18:00:02,248 INFO L130 PetriNetUnfolder]: 15/174 cut-off events. [2022-11-25 18:00:02,249 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:00:02,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 15/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 153 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-11-25 18:00:02,254 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2022-11-25 18:00:09,392 INFO L134 LiptonReduction]: Checked pairs total: 2741 [2022-11-25 18:00:09,393 INFO L136 LiptonReduction]: Total number of compositions: 203 [2022-11-25 18:00:09,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:00:09,426 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;@2ee91902, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:00:09,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 18:00:09,432 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 18:00:09,432 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:00:09,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:09,433 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:09,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:09,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1129581645, now seen corresponding path program 1 times [2022-11-25 18:00:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:09,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310889983] [2022-11-25 18:00:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:09,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:10,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:10,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310889983] [2022-11-25 18:00:10,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310889983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:10,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:10,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:00:10,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100904458] [2022-11-25 18:00:10,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:10,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:00:10,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:10,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:00:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:00:10,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 388 [2022-11-25 18:00:10,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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) [2022-11-25 18:00:10,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:10,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 388 [2022-11-25 18:00:10,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:10,292 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2022-11-25 18:00:10,293 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:00:10,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 176 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-11-25 18:00:10,300 INFO L137 encePairwiseOnDemand]: 385/388 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-11-25 18:00:10,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-11-25 18:00:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:00:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:00:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2022-11-25 18:00:10,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4372852233676976 [2022-11-25 18:00:10,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2022-11-25 18:00:10,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2022-11-25 18:00:10,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:10,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2022-11-25 18:00:10,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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) [2022-11-25 18:00:10,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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) [2022-11-25 18:00:10,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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) [2022-11-25 18:00:10,358 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 509 transitions. [2022-11-25 18:00:10,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-11-25 18:00:10,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:00:10,364 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-11-25 18:00:10,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-11-25 18:00:10,371 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-11-25 18:00:10,372 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-11-25 18:00:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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) [2022-11-25 18:00:10,373 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:10,373 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:10,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:00:10,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash -854925576, now seen corresponding path program 1 times [2022-11-25 18:00:10,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:10,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393059248] [2022-11-25 18:00:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:10,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:10,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393059248] [2022-11-25 18:00:10,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393059248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:10,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:10,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:00:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124191074] [2022-11-25 18:00:10,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:10,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:00:10,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:10,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:00:10,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:00:10,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 388 [2022-11-25 18:00:10,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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) [2022-11-25 18:00:10,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:10,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 388 [2022-11-25 18:00:10,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:10,679 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2022-11-25 18:00:10,679 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:00:10,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 319 event pairs, 9 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2022-11-25 18:00:10,680 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2022-11-25 18:00:10,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2022-11-25 18:00:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:00:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:00:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2022-11-25 18:00:10,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43986254295532645 [2022-11-25 18:00:10,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2022-11-25 18:00:10,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2022-11-25 18:00:10,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:10,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2022-11-25 18:00:10,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2022-11-25 18:00:10,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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) [2022-11-25 18:00:10,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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) [2022-11-25 18:00:10,691 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 512 transitions. [2022-11-25 18:00:10,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2022-11-25 18:00:10,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:00:10,693 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2022-11-25 18:00:10,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2022-11-25 18:00:10,694 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2022-11-25 18:00:10,694 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2022-11-25 18:00:10,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 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) [2022-11-25 18:00:10,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:10,695 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:10,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:00:10,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:10,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1007976154, now seen corresponding path program 1 times [2022-11-25 18:00:10,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:10,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052197858] [2022-11-25 18:00:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:10,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:10,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:10,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052197858] [2022-11-25 18:00:10,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052197858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:10,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:10,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:00:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23891710] [2022-11-25 18:00:10,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:10,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:00:10,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:00:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:00:10,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 388 [2022-11-25 18:00:10,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 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) [2022-11-25 18:00:10,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:10,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 388 [2022-11-25 18:00:10,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:11,152 INFO L130 PetriNetUnfolder]: 74/143 cut-off events. [2022-11-25 18:00:11,153 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-11-25 18:00:11,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 143 events. 74/143 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 472 event pairs, 21 based on Foata normal form. 8/148 useless extension candidates. Maximal degree in co-relation 330. Up to 83 conditions per place. [2022-11-25 18:00:11,157 INFO L137 encePairwiseOnDemand]: 384/388 looper letters, 29 selfloop transitions, 4 changer transitions 2/36 dead transitions. [2022-11-25 18:00:11,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 180 flow [2022-11-25 18:00:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:00:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:00:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2022-11-25 18:00:11,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43556701030927836 [2022-11-25 18:00:11,161 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2022-11-25 18:00:11,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2022-11-25 18:00:11,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:11,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2022-11-25 18:00:11,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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) [2022-11-25 18:00:11,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 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) [2022-11-25 18:00:11,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 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) [2022-11-25 18:00:11,169 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 4 states and 676 transitions. [2022-11-25 18:00:11,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 180 flow [2022-11-25 18:00:11,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:00:11,172 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 89 flow [2022-11-25 18:00:11,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-11-25 18:00:11,174 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-11-25 18:00:11,174 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 89 flow [2022-11-25 18:00:11,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 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) [2022-11-25 18:00:11,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:11,175 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:11,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:00:11,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:11,177 INFO L85 PathProgramCache]: Analyzing trace with hash -421317822, now seen corresponding path program 1 times [2022-11-25 18:00:11,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:11,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040882931] [2022-11-25 18:00:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:11,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:11,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:11,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040882931] [2022-11-25 18:00:11,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040882931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:11,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:11,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:00:11,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726950378] [2022-11-25 18:00:11,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:11,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:00:11,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:11,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:00:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:00:11,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 388 [2022-11-25 18:00:11,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 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) [2022-11-25 18:00:11,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:11,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 388 [2022-11-25 18:00:11,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:11,684 INFO L130 PetriNetUnfolder]: 85/157 cut-off events. [2022-11-25 18:00:11,689 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-11-25 18:00:11,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 157 events. 85/157 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 486 event pairs, 2 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 447. Up to 72 conditions per place. [2022-11-25 18:00:11,692 INFO L137 encePairwiseOnDemand]: 382/388 looper letters, 34 selfloop transitions, 8 changer transitions 4/46 dead transitions. [2022-11-25 18:00:11,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 255 flow [2022-11-25 18:00:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:00:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:00:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 989 transitions. [2022-11-25 18:00:11,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42482817869415807 [2022-11-25 18:00:11,703 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 989 transitions. [2022-11-25 18:00:11,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 989 transitions. [2022-11-25 18:00:11,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:11,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 989 transitions. [2022-11-25 18:00:11,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.83333333333334) internal successors, (989), 6 states have internal predecessors, (989), 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) [2022-11-25 18:00:11,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 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) [2022-11-25 18:00:11,717 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 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) [2022-11-25 18:00:11,717 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 89 flow. Second operand 6 states and 989 transitions. [2022-11-25 18:00:11,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 255 flow [2022-11-25 18:00:11,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 241 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 18:00:11,723 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 120 flow [2022-11-25 18:00:11,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2022-11-25 18:00:11,726 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2022-11-25 18:00:11,726 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 120 flow [2022-11-25 18:00:11,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 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) [2022-11-25 18:00:11,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:11,727 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:11,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:00:11,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash -128196988, now seen corresponding path program 2 times [2022-11-25 18:00:11,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:11,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906208197] [2022-11-25 18:00:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:11,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:11,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:11,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906208197] [2022-11-25 18:00:11,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906208197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:11,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:11,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:00:11,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821495704] [2022-11-25 18:00:11,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:11,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:00:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:00:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:00:12,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 388 [2022-11-25 18:00:12,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 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) [2022-11-25 18:00:12,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:12,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 388 [2022-11-25 18:00:12,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:12,201 INFO L130 PetriNetUnfolder]: 83/156 cut-off events. [2022-11-25 18:00:12,202 INFO L131 PetriNetUnfolder]: For 196/196 co-relation queries the response was YES. [2022-11-25 18:00:12,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 156 events. 83/156 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 422 event pairs, 25 based on Foata normal form. 6/161 useless extension candidates. Maximal degree in co-relation 495. Up to 102 conditions per place. [2022-11-25 18:00:12,203 INFO L137 encePairwiseOnDemand]: 383/388 looper letters, 33 selfloop transitions, 7 changer transitions 2/42 dead transitions. [2022-11-25 18:00:12,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 270 flow [2022-11-25 18:00:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:00:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:00:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 820 transitions. [2022-11-25 18:00:12,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.422680412371134 [2022-11-25 18:00:12,207 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 820 transitions. [2022-11-25 18:00:12,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 820 transitions. [2022-11-25 18:00:12,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:12,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 820 transitions. [2022-11-25 18:00:12,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 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) [2022-11-25 18:00:12,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 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) [2022-11-25 18:00:12,216 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 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) [2022-11-25 18:00:12,217 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 120 flow. Second operand 5 states and 820 transitions. [2022-11-25 18:00:12,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 270 flow [2022-11-25 18:00:12,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 253 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 18:00:12,222 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 152 flow [2022-11-25 18:00:12,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2022-11-25 18:00:12,225 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2022-11-25 18:00:12,226 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 152 flow [2022-11-25 18:00:12,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 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) [2022-11-25 18:00:12,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:12,229 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:12,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:00:12,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:12,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1618862994, now seen corresponding path program 3 times [2022-11-25 18:00:12,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:12,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582725350] [2022-11-25 18:00:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:12,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:12,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582725350] [2022-11-25 18:00:12,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582725350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:12,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153813240] [2022-11-25 18:00:12,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:00:12,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:00:12,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:00:12,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:00:12,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:00:12,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:00:12,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:00:12,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:00:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:12,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153813240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:00:12,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:00:12,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-25 18:00:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381940512] [2022-11-25 18:00:12,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:12,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:00:12,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:00:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:00:12,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2022-11-25 18:00:12,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 159.71428571428572) internal successors, (1118), 7 states have internal predecessors, (1118), 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) [2022-11-25 18:00:12,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:12,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2022-11-25 18:00:12,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:13,200 INFO L130 PetriNetUnfolder]: 102/189 cut-off events. [2022-11-25 18:00:13,200 INFO L131 PetriNetUnfolder]: For 405/405 co-relation queries the response was YES. [2022-11-25 18:00:13,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 189 events. 102/189 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 561 event pairs, 28 based on Foata normal form. 6/194 useless extension candidates. Maximal degree in co-relation 733. Up to 119 conditions per place. [2022-11-25 18:00:13,202 INFO L137 encePairwiseOnDemand]: 383/388 looper letters, 39 selfloop transitions, 15 changer transitions 3/57 dead transitions. [2022-11-25 18:00:13,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 421 flow [2022-11-25 18:00:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:00:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:00:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1141 transitions. [2022-11-25 18:00:13,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42010309278350516 [2022-11-25 18:00:13,207 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1141 transitions. [2022-11-25 18:00:13,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1141 transitions. [2022-11-25 18:00:13,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:13,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1141 transitions. [2022-11-25 18:00:13,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 163.0) internal successors, (1141), 7 states have internal predecessors, (1141), 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) [2022-11-25 18:00:13,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 388.0) internal successors, (3104), 8 states have internal predecessors, (3104), 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) [2022-11-25 18:00:13,217 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 388.0) internal successors, (3104), 8 states have internal predecessors, (3104), 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) [2022-11-25 18:00:13,217 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 152 flow. Second operand 7 states and 1141 transitions. [2022-11-25 18:00:13,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 421 flow [2022-11-25 18:00:13,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 389 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-25 18:00:13,220 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 232 flow [2022-11-25 18:00:13,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2022-11-25 18:00:13,221 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2022-11-25 18:00:13,222 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 232 flow [2022-11-25 18:00:13,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 159.71428571428572) internal successors, (1118), 7 states have internal predecessors, (1118), 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) [2022-11-25 18:00:13,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:13,223 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:13,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:00:13,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:00:13,430 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:13,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:13,430 INFO L85 PathProgramCache]: Analyzing trace with hash -132464252, now seen corresponding path program 4 times [2022-11-25 18:00:13,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:13,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949229679] [2022-11-25 18:00:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:13,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:13,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:13,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949229679] [2022-11-25 18:00:13,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949229679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:13,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346514455] [2022-11-25 18:00:13,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:00:13,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:00:13,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:00:13,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:00:13,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:00:13,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:00:13,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:00:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:00:13,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:13,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:13,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346514455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:00:13,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:00:13,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 18:00:13,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654947200] [2022-11-25 18:00:13,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:13,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:00:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:13,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:00:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:00:14,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2022-11-25 18:00:14,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 232 flow. Second operand has 8 states, 8 states have (on average 158.625) internal successors, (1269), 8 states have internal predecessors, (1269), 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) [2022-11-25 18:00:14,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:14,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2022-11-25 18:00:14,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:14,253 INFO L130 PetriNetUnfolder]: 96/175 cut-off events. [2022-11-25 18:00:14,253 INFO L131 PetriNetUnfolder]: For 507/507 co-relation queries the response was YES. [2022-11-25 18:00:14,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 175 events. 96/175 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 482 event pairs, 25 based on Foata normal form. 6/180 useless extension candidates. Maximal degree in co-relation 715. Up to 116 conditions per place. [2022-11-25 18:00:14,256 INFO L137 encePairwiseOnDemand]: 383/388 looper letters, 30 selfloop transitions, 14 changer transitions 2/46 dead transitions. [2022-11-25 18:00:14,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 378 flow [2022-11-25 18:00:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:00:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:00:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2022-11-25 18:00:14,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42061855670103093 [2022-11-25 18:00:14,261 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2022-11-25 18:00:14,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2022-11-25 18:00:14,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:14,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2022-11-25 18:00:14,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 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) [2022-11-25 18:00:14,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 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) [2022-11-25 18:00:14,271 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 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) [2022-11-25 18:00:14,271 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 232 flow. Second operand 5 states and 816 transitions. [2022-11-25 18:00:14,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 378 flow [2022-11-25 18:00:14,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 368 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-25 18:00:14,277 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 257 flow [2022-11-25 18:00:14,278 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2022-11-25 18:00:14,279 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2022-11-25 18:00:14,279 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 257 flow [2022-11-25 18:00:14,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.625) internal successors, (1269), 8 states have internal predecessors, (1269), 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) [2022-11-25 18:00:14,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:14,280 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:14,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 18:00:14,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:00:14,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1651329168, now seen corresponding path program 1 times [2022-11-25 18:00:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057079159] [2022-11-25 18:00:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:00:14,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:14,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057079159] [2022-11-25 18:00:14,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057079159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:14,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648467647] [2022-11-25 18:00:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:14,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:00:14,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:00:14,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:00:14,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:00:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:14,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 18:00:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:14,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-25 18:00:15,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2022-11-25 18:00:15,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2022-11-25 18:00:15,253 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-11-25 18:00:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 26 [2022-11-25 18:00:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:15,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:17,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:17,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 134 [2022-11-25 18:00:17,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:17,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 696 treesize of output 652 [2022-11-25 18:00:17,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:17,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 286 treesize of output 274 [2022-11-25 18:00:17,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:17,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 472 treesize of output 364 [2022-11-25 18:00:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:20,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648467647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:00:20,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:00:20,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2022-11-25 18:00:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229718381] [2022-11-25 18:00:20,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:00:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:20,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:00:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=187, Unknown=5, NotChecked=0, Total=240 [2022-11-25 18:00:21,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 388 [2022-11-25 18:00:21,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 257 flow. Second operand has 16 states, 16 states have (on average 113.6875) internal successors, (1819), 16 states have internal predecessors, (1819), 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) [2022-11-25 18:00:21,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:21,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 388 [2022-11-25 18:00:21,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:23,151 INFO L130 PetriNetUnfolder]: 273/485 cut-off events. [2022-11-25 18:00:23,152 INFO L131 PetriNetUnfolder]: For 1448/1484 co-relation queries the response was YES. [2022-11-25 18:00:23,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 485 events. 273/485 cut-off events. For 1448/1484 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1985 event pairs, 18 based on Foata normal form. 57/534 useless extension candidates. Maximal degree in co-relation 1816. Up to 239 conditions per place. [2022-11-25 18:00:23,157 INFO L137 encePairwiseOnDemand]: 379/388 looper letters, 38 selfloop transitions, 22 changer transitions 76/139 dead transitions. [2022-11-25 18:00:23,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 139 transitions, 1137 flow [2022-11-25 18:00:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:00:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 18:00:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2556 transitions. [2022-11-25 18:00:23,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2994376757263355 [2022-11-25 18:00:23,168 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2556 transitions. [2022-11-25 18:00:23,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2556 transitions. [2022-11-25 18:00:23,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:23,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2556 transitions. [2022-11-25 18:00:23,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 116.18181818181819) internal successors, (2556), 22 states have internal predecessors, (2556), 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) [2022-11-25 18:00:23,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 388.0) internal successors, (8924), 23 states have internal predecessors, (8924), 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) [2022-11-25 18:00:23,216 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 388.0) internal successors, (8924), 23 states have internal predecessors, (8924), 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) [2022-11-25 18:00:23,216 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 257 flow. Second operand 22 states and 2556 transitions. [2022-11-25 18:00:23,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 139 transitions, 1137 flow [2022-11-25 18:00:23,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 139 transitions, 1033 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-11-25 18:00:23,224 INFO L231 Difference]: Finished difference. Result has 73 places, 43 transitions, 386 flow [2022-11-25 18:00:23,225 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=386, PETRI_PLACES=73, PETRI_TRANSITIONS=43} [2022-11-25 18:00:23,229 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2022-11-25 18:00:23,229 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 43 transitions, 386 flow [2022-11-25 18:00:23,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 113.6875) internal successors, (1819), 16 states have internal predecessors, (1819), 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) [2022-11-25 18:00:23,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:23,231 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:23,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:00:23,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 18:00:23,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:00:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1838857470, now seen corresponding path program 2 times [2022-11-25 18:00:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:00:23,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936339303] [2022-11-25 18:00:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:00:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:24,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:00:24,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936339303] [2022-11-25 18:00:24,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936339303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:24,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087508405] [2022-11-25 18:00:24,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:00:24,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:00:24,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:00:24,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:00:24,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:00:25,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:00:25,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:00:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 18:00:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:25,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-11-25 18:00:25,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2022-11-25 18:00:25,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:25,424 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-25 18:00:25,644 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2022-11-25 18:00:25,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 29 [2022-11-25 18:00:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:25,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:26,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:26,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 181 [2022-11-25 18:00:26,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:26,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 1428 treesize of output 1350 [2022-11-25 18:00:26,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:26,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 1218 treesize of output 1176 [2022-11-25 18:00:27,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:27,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 924 treesize of output 720 [2022-11-25 18:00:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:52,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087508405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:00:52,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:00:52,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2022-11-25 18:00:52,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024970570] [2022-11-25 18:00:52,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 18:00:52,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 18:00:52,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=312, Unknown=7, NotChecked=0, Total=380 [2022-11-25 18:00:54,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:57,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:59,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 388 [2022-11-25 18:00:59,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 43 transitions, 386 flow. Second operand has 20 states, 20 states have (on average 113.55) internal successors, (2271), 20 states have internal predecessors, (2271), 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) [2022-11-25 18:00:59,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:59,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 388 [2022-11-25 18:00:59,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:01,118 INFO L130 PetriNetUnfolder]: 201/370 cut-off events. [2022-11-25 18:01:01,119 INFO L131 PetriNetUnfolder]: For 2050/2068 co-relation queries the response was YES. [2022-11-25 18:01:01,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2190 conditions, 370 events. 201/370 cut-off events. For 2050/2068 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1410 event pairs, 4 based on Foata normal form. 41/408 useless extension candidates. Maximal degree in co-relation 2161. Up to 186 conditions per place. [2022-11-25 18:01:01,124 INFO L137 encePairwiseOnDemand]: 380/388 looper letters, 46 selfloop transitions, 20 changer transitions 40/109 dead transitions. [2022-11-25 18:01:01,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 1099 flow [2022-11-25 18:01:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 18:01:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 18:01:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2082 transitions. [2022-11-25 18:01:01,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2981099656357388 [2022-11-25 18:01:01,134 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2082 transitions. [2022-11-25 18:01:01,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2082 transitions. [2022-11-25 18:01:01,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:01,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2082 transitions. [2022-11-25 18:01:01,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 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) [2022-11-25 18:01:01,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 388.0) internal successors, (7372), 19 states have internal predecessors, (7372), 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) [2022-11-25 18:01:01,156 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 388.0) internal successors, (7372), 19 states have internal predecessors, (7372), 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) [2022-11-25 18:01:01,157 INFO L175 Difference]: Start difference. First operand has 73 places, 43 transitions, 386 flow. Second operand 18 states and 2082 transitions. [2022-11-25 18:01:01,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 1099 flow [2022-11-25 18:01:01,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 109 transitions, 918 flow, removed 76 selfloop flow, removed 13 redundant places. [2022-11-25 18:01:01,169 INFO L231 Difference]: Finished difference. Result has 73 places, 41 transitions, 366 flow [2022-11-25 18:01:01,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=366, PETRI_PLACES=73, PETRI_TRANSITIONS=41} [2022-11-25 18:01:01,171 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2022-11-25 18:01:01,171 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 41 transitions, 366 flow [2022-11-25 18:01:01,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 113.55) internal successors, (2271), 20 states have internal predecessors, (2271), 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) [2022-11-25 18:01:01,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:01,173 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:01,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:01,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:01:01,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:01:01,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1006507631, now seen corresponding path program 3 times [2022-11-25 18:01:01,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:01:01,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737872358] [2022-11-25 18:01:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:01,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:01:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:08,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:01:08,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737872358] [2022-11-25 18:01:08,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737872358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:01:08,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445532349] [2022-11-25 18:01:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:01:08,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:01:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:01:08,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:01:08,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:01:08,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:01:08,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:08,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 18:01:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:09,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-25 18:01:09,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2022-11-25 18:01:09,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2022-11-25 18:01:09,991 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-25 18:01:09,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 40 [2022-11-25 18:01:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:10,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:12,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:01:12,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 330 treesize of output 198 [2022-11-25 18:01:13,071 INFO L321 Elim1Store]: treesize reduction 5, result has 96.8 percent of original size [2022-11-25 18:01:13,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 1108 treesize of output 1099 [2022-11-25 18:01:13,413 INFO L321 Elim1Store]: treesize reduction 12, result has 92.4 percent of original size [2022-11-25 18:01:13,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 916 treesize of output 804 [2022-11-25 18:01:13,867 INFO L321 Elim1Store]: treesize reduction 12, result has 92.4 percent of original size [2022-11-25 18:01:13,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 628 treesize of output 660 [2022-11-25 18:01:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:28,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445532349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:01:28,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:01:28,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2022-11-25 18:01:28,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034017919] [2022-11-25 18:01:28,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:01:28,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 18:01:28,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:01:28,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 18:01:28,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=700, Unknown=2, NotChecked=0, Total=870 [2022-11-25 18:01:30,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:32,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:38,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:41,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 388 [2022-11-25 18:01:41,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 41 transitions, 366 flow. Second operand has 30 states, 30 states have (on average 112.73333333333333) internal successors, (3382), 30 states have internal predecessors, (3382), 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) [2022-11-25 18:01:41,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:41,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 388 [2022-11-25 18:01:41,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:44,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:01:48,658 INFO L130 PetriNetUnfolder]: 421/747 cut-off events. [2022-11-25 18:01:48,658 INFO L131 PetriNetUnfolder]: For 2694/2706 co-relation queries the response was YES. [2022-11-25 18:01:48,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 747 events. 421/747 cut-off events. For 2694/2706 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3164 event pairs, 26 based on Foata normal form. 14/757 useless extension candidates. Maximal degree in co-relation 3699. Up to 332 conditions per place. [2022-11-25 18:01:48,670 INFO L137 encePairwiseOnDemand]: 380/388 looper letters, 102 selfloop transitions, 69 changer transitions 3/177 dead transitions. [2022-11-25 18:01:48,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 177 transitions, 1703 flow [2022-11-25 18:01:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 18:01:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 18:01:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2240 transitions. [2022-11-25 18:01:48,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3038524145415084 [2022-11-25 18:01:48,689 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2240 transitions. [2022-11-25 18:01:48,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2240 transitions. [2022-11-25 18:01:48,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:48,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2240 transitions. [2022-11-25 18:01:48,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 117.89473684210526) internal successors, (2240), 19 states have internal predecessors, (2240), 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) [2022-11-25 18:01:48,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 388.0) internal successors, (7760), 20 states have internal predecessors, (7760), 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) [2022-11-25 18:01:48,709 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 388.0) internal successors, (7760), 20 states have internal predecessors, (7760), 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) [2022-11-25 18:01:48,709 INFO L175 Difference]: Start difference. First operand has 73 places, 41 transitions, 366 flow. Second operand 19 states and 2240 transitions. [2022-11-25 18:01:48,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 177 transitions, 1703 flow [2022-11-25 18:01:48,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 177 transitions, 1499 flow, removed 58 selfloop flow, removed 13 redundant places. [2022-11-25 18:01:48,721 INFO L231 Difference]: Finished difference. Result has 77 places, 101 transitions, 1111 flow [2022-11-25 18:01:48,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1111, PETRI_PLACES=77, PETRI_TRANSITIONS=101} [2022-11-25 18:01:48,722 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2022-11-25 18:01:48,722 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 101 transitions, 1111 flow [2022-11-25 18:01:48,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 112.73333333333333) internal successors, (3382), 30 states have internal predecessors, (3382), 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) [2022-11-25 18:01:48,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:48,725 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:48,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:48,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:01:48,931 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:01:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 496731759, now seen corresponding path program 4 times [2022-11-25 18:01:48,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:01:48,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648152514] [2022-11-25 18:01:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:48,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:01:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:51,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:01:51,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648152514] [2022-11-25 18:01:51,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648152514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:01:51,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104404404] [2022-11-25 18:01:51,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:01:51,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:01:51,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:01:51,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:01:51,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:01:51,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:01:51,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 18:01:51,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:51,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:01:51,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-11-25 18:01:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:01:51,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:51,745 INFO L321 Elim1Store]: treesize reduction 15, result has 90.4 percent of original size [2022-11-25 18:01:51,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 177 [2022-11-25 18:01:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:01:52,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104404404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:01:52,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:01:52,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2022-11-25 18:01:52,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906273619] [2022-11-25 18:01:52,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:01:52,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 18:01:52,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:01:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 18:01:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-25 18:01:54,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 388 [2022-11-25 18:01:54,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 101 transitions, 1111 flow. Second operand has 20 states, 20 states have (on average 146.05) internal successors, (2921), 20 states have internal predecessors, (2921), 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) [2022-11-25 18:01:54,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:54,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 388 [2022-11-25 18:01:54,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:56,689 INFO L130 PetriNetUnfolder]: 880/1579 cut-off events. [2022-11-25 18:01:56,690 INFO L131 PetriNetUnfolder]: For 6592/6662 co-relation queries the response was YES. [2022-11-25 18:01:56,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8190 conditions, 1579 events. 880/1579 cut-off events. For 6592/6662 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8342 event pairs, 93 based on Foata normal form. 70/1639 useless extension candidates. Maximal degree in co-relation 7338. Up to 707 conditions per place. [2022-11-25 18:01:56,709 INFO L137 encePairwiseOnDemand]: 381/388 looper letters, 125 selfloop transitions, 124 changer transitions 2/260 dead transitions. [2022-11-25 18:01:56,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 260 transitions, 2968 flow [2022-11-25 18:01:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:01:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 18:01:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3160 transitions. [2022-11-25 18:01:56,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38782523318605794 [2022-11-25 18:01:56,719 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3160 transitions. [2022-11-25 18:01:56,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3160 transitions. [2022-11-25 18:01:56,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:56,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3160 transitions. [2022-11-25 18:01:56,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 150.47619047619048) internal successors, (3160), 21 states have internal predecessors, (3160), 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) [2022-11-25 18:01:56,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 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) [2022-11-25 18:01:56,741 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 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) [2022-11-25 18:01:56,741 INFO L175 Difference]: Start difference. First operand has 77 places, 101 transitions, 1111 flow. Second operand 21 states and 3160 transitions. [2022-11-25 18:01:56,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 260 transitions, 2968 flow [2022-11-25 18:01:56,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 260 transitions, 2710 flow, removed 127 selfloop flow, removed 2 redundant places. [2022-11-25 18:01:56,765 INFO L231 Difference]: Finished difference. Result has 100 places, 187 transitions, 2328 flow [2022-11-25 18:01:56,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2328, PETRI_PLACES=100, PETRI_TRANSITIONS=187} [2022-11-25 18:01:56,766 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2022-11-25 18:01:56,766 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 187 transitions, 2328 flow [2022-11-25 18:01:56,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 146.05) internal successors, (2921), 20 states have internal predecessors, (2921), 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) [2022-11-25 18:01:56,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:56,768 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:56,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:56,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:01:56,974 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:01:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash -494249529, now seen corresponding path program 5 times [2022-11-25 18:01:56,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:01:56,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460539501] [2022-11-25 18:01:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:01:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:59,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:01:59,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460539501] [2022-11-25 18:01:59,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460539501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:01:59,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504124785] [2022-11-25 18:01:59,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:01:59,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:01:59,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:01:59,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:01:59,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:01:59,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:01:59,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:59,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 18:01:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:00,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:00,343 INFO L321 Elim1Store]: treesize reduction 88, result has 29.0 percent of original size [2022-11-25 18:02:00,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 62 [2022-11-25 18:02:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:00,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:00,740 INFO L321 Elim1Store]: treesize reduction 15, result has 90.4 percent of original size [2022-11-25 18:02:00,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 177 [2022-11-25 18:02:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:02:01,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504124785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:01,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:01,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2022-11-25 18:02:01,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802679947] [2022-11-25 18:02:01,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:01,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:02:01,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:02:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:02:03,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 388 [2022-11-25 18:02:03,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 187 transitions, 2328 flow. Second operand has 21 states, 21 states have (on average 145.95238095238096) internal successors, (3065), 21 states have internal predecessors, (3065), 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) [2022-11-25 18:02:03,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:03,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 388 [2022-11-25 18:02:03,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:06,188 INFO L130 PetriNetUnfolder]: 1096/1976 cut-off events. [2022-11-25 18:02:06,189 INFO L131 PetriNetUnfolder]: For 9470/9521 co-relation queries the response was YES. [2022-11-25 18:02:06,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10541 conditions, 1976 events. 1096/1976 cut-off events. For 9470/9521 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11188 event pairs, 213 based on Foata normal form. 52/2019 useless extension candidates. Maximal degree in co-relation 10491. Up to 1417 conditions per place. [2022-11-25 18:02:06,212 INFO L137 encePairwiseOnDemand]: 381/388 looper letters, 177 selfloop transitions, 90 changer transitions 2/278 dead transitions. [2022-11-25 18:02:06,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 278 transitions, 3552 flow [2022-11-25 18:02:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:02:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:02:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2996 transitions. [2022-11-25 18:02:06,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38608247422680414 [2022-11-25 18:02:06,220 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2996 transitions. [2022-11-25 18:02:06,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2996 transitions. [2022-11-25 18:02:06,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:06,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2996 transitions. [2022-11-25 18:02:06,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 149.8) internal successors, (2996), 20 states have internal predecessors, (2996), 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) [2022-11-25 18:02:06,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 388.0) internal successors, (8148), 21 states have internal predecessors, (8148), 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) [2022-11-25 18:02:06,241 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 388.0) internal successors, (8148), 21 states have internal predecessors, (8148), 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) [2022-11-25 18:02:06,241 INFO L175 Difference]: Start difference. First operand has 100 places, 187 transitions, 2328 flow. Second operand 20 states and 2996 transitions. [2022-11-25 18:02:06,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 278 transitions, 3552 flow [2022-11-25 18:02:06,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 278 transitions, 3240 flow, removed 140 selfloop flow, removed 6 redundant places. [2022-11-25 18:02:06,304 INFO L231 Difference]: Finished difference. Result has 119 places, 219 transitions, 2746 flow [2022-11-25 18:02:06,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2746, PETRI_PLACES=119, PETRI_TRANSITIONS=219} [2022-11-25 18:02:06,306 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 98 predicate places. [2022-11-25 18:02:06,307 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 219 transitions, 2746 flow [2022-11-25 18:02:06,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 145.95238095238096) internal successors, (3065), 21 states have internal predecessors, (3065), 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) [2022-11-25 18:02:06,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:06,309 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:06,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:06,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:06,515 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash -617420261, now seen corresponding path program 6 times [2022-11-25 18:02:06,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:06,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405103922] [2022-11-25 18:02:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:06,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:08,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405103922] [2022-11-25 18:02:08,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405103922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384903815] [2022-11-25 18:02:08,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:02:08,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:08,679 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:08,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:02:08,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:02:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 18:02:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:09,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:09,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-11-25 18:02:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:09,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:09,453 INFO L321 Elim1Store]: treesize reduction 15, result has 90.4 percent of original size [2022-11-25 18:02:09,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 177 [2022-11-25 18:02:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:02:09,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384903815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:09,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:09,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2022-11-25 18:02:09,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163891273] [2022-11-25 18:02:09,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:09,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 18:02:09,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 18:02:09,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-25 18:02:12,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 388 [2022-11-25 18:02:12,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 219 transitions, 2746 flow. Second operand has 20 states, 20 states have (on average 147.15) internal successors, (2943), 20 states have internal predecessors, (2943), 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) [2022-11-25 18:02:12,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:12,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 388 [2022-11-25 18:02:12,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:14,356 INFO L130 PetriNetUnfolder]: 1376/2483 cut-off events. [2022-11-25 18:02:14,356 INFO L131 PetriNetUnfolder]: For 12231/12283 co-relation queries the response was YES. [2022-11-25 18:02:14,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13330 conditions, 2483 events. 1376/2483 cut-off events. For 12231/12283 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14855 event pairs, 290 based on Foata normal form. 51/2518 useless extension candidates. Maximal degree in co-relation 13274. Up to 1866 conditions per place. [2022-11-25 18:02:14,386 INFO L137 encePairwiseOnDemand]: 382/388 looper letters, 236 selfloop transitions, 79 changer transitions 2/326 dead transitions. [2022-11-25 18:02:14,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 326 transitions, 4379 flow [2022-11-25 18:02:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:02:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:02:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3012 transitions. [2022-11-25 18:02:14,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3881443298969072 [2022-11-25 18:02:14,394 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3012 transitions. [2022-11-25 18:02:14,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3012 transitions. [2022-11-25 18:02:14,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:14,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3012 transitions. [2022-11-25 18:02:14,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 150.6) internal successors, (3012), 20 states have internal predecessors, (3012), 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) [2022-11-25 18:02:14,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 388.0) internal successors, (8148), 21 states have internal predecessors, (8148), 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) [2022-11-25 18:02:14,418 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 388.0) internal successors, (8148), 21 states have internal predecessors, (8148), 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) [2022-11-25 18:02:14,418 INFO L175 Difference]: Start difference. First operand has 119 places, 219 transitions, 2746 flow. Second operand 20 states and 3012 transitions. [2022-11-25 18:02:14,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 326 transitions, 4379 flow [2022-11-25 18:02:14,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 326 transitions, 4170 flow, removed 76 selfloop flow, removed 9 redundant places. [2022-11-25 18:02:14,501 INFO L231 Difference]: Finished difference. Result has 137 places, 267 transitions, 3587 flow [2022-11-25 18:02:14,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3587, PETRI_PLACES=137, PETRI_TRANSITIONS=267} [2022-11-25 18:02:14,503 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2022-11-25 18:02:14,503 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 267 transitions, 3587 flow [2022-11-25 18:02:14,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 147.15) internal successors, (2943), 20 states have internal predecessors, (2943), 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) [2022-11-25 18:02:14,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:14,505 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:14,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:14,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:14,718 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1362970541, now seen corresponding path program 7 times [2022-11-25 18:02:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:14,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644009056] [2022-11-25 18:02:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:17,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:17,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644009056] [2022-11-25 18:02:17,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644009056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:17,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593897072] [2022-11-25 18:02:17,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:02:17,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:17,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:17,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:02:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:02:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:17,858 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-25 18:02:17,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:17,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-11-25 18:02:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:17,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:18,059 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (= c_~x1~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4)))))) is different from false [2022-11-25 18:02:18,156 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (= (let ((.cse0 (select |c_#memory_int| c_~f~0.base))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4)))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4)))))) is different from false [2022-11-25 18:02:18,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:18,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 222 [2022-11-25 18:02:18,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:18,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 56 [2022-11-25 18:02:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-11-25 18:02:19,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593897072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:19,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:19,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-11-25 18:02:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745288870] [2022-11-25 18:02:19,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:19,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 18:02:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 18:02:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=401, Unknown=4, NotChecked=82, Total=552 [2022-11-25 18:02:19,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 388 [2022-11-25 18:02:19,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 267 transitions, 3587 flow. Second operand has 24 states, 24 states have (on average 122.625) internal successors, (2943), 24 states have internal predecessors, (2943), 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) [2022-11-25 18:02:19,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:19,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 388 [2022-11-25 18:02:19,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:20,907 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_376 (Array Int Int))) (= (let ((.cse0 (select |c_#memory_int| c_~f~0.base))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4)))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* (select .cse1 .cse2) 4) c_~f~0.offset)) 4)))))) (forall ((v_ArrVal_376 (Array Int Int))) (= c_~x1~0 (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (select .cse3 (+ c_~f~0.offset (* (select .cse3 (+ (* (select .cse3 .cse2) 4) c_~f~0.offset)) 4)))))))) is different from false [2022-11-25 18:02:21,764 INFO L130 PetriNetUnfolder]: 1674/2987 cut-off events. [2022-11-25 18:02:21,764 INFO L131 PetriNetUnfolder]: For 16414/16510 co-relation queries the response was YES. [2022-11-25 18:02:21,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16766 conditions, 2987 events. 1674/2987 cut-off events. For 16414/16510 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18274 event pairs, 332 based on Foata normal form. 75/3044 useless extension candidates. Maximal degree in co-relation 16701. Up to 2231 conditions per place. [2022-11-25 18:02:21,799 INFO L137 encePairwiseOnDemand]: 376/388 looper letters, 235 selfloop transitions, 150 changer transitions 3/397 dead transitions. [2022-11-25 18:02:21,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 397 transitions, 5647 flow [2022-11-25 18:02:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 18:02:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 18:02:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2913 transitions. [2022-11-25 18:02:21,805 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3264231286418646 [2022-11-25 18:02:21,805 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2913 transitions. [2022-11-25 18:02:21,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2913 transitions. [2022-11-25 18:02:21,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:21,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2913 transitions. [2022-11-25 18:02:21,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 126.65217391304348) internal successors, (2913), 23 states have internal predecessors, (2913), 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) [2022-11-25 18:02:21,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 388.0) internal successors, (9312), 24 states have internal predecessors, (9312), 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) [2022-11-25 18:02:21,820 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 388.0) internal successors, (9312), 24 states have internal predecessors, (9312), 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) [2022-11-25 18:02:21,821 INFO L175 Difference]: Start difference. First operand has 137 places, 267 transitions, 3587 flow. Second operand 23 states and 2913 transitions. [2022-11-25 18:02:21,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 397 transitions, 5647 flow [2022-11-25 18:02:21,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 397 transitions, 5385 flow, removed 117 selfloop flow, removed 6 redundant places. [2022-11-25 18:02:21,924 INFO L231 Difference]: Finished difference. Result has 160 places, 347 transitions, 4905 flow [2022-11-25 18:02:21,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=3325, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4905, PETRI_PLACES=160, PETRI_TRANSITIONS=347} [2022-11-25 18:02:21,927 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2022-11-25 18:02:21,927 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 347 transitions, 4905 flow [2022-11-25 18:02:21,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 122.625) internal successors, (2943), 24 states have internal predecessors, (2943), 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) [2022-11-25 18:02:21,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:21,928 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:21,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 18:02:22,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:02:22,134 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:22,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1931530257, now seen corresponding path program 8 times [2022-11-25 18:02:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:22,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350771609] [2022-11-25 18:02:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:22,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:24,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:24,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350771609] [2022-11-25 18:02:24,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350771609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:24,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357841968] [2022-11-25 18:02:24,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:24,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:24,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:24,533 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:24,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:02:24,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:24,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:02:24,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:24,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:24,898 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 22 [2022-11-25 18:02:25,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:25,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-11-25 18:02:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:25,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:25,190 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_411 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_411) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4) c_~f~0.offset))))) is different from false [2022-11-25 18:02:25,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:25,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 228 [2022-11-25 18:02:25,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:25,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 92 [2022-11-25 18:02:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-11-25 18:02:26,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357841968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:26,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:26,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-11-25 18:02:26,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487504527] [2022-11-25 18:02:26,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:26,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 18:02:26,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:26,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 18:02:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=438, Unknown=3, NotChecked=42, Total=552 [2022-11-25 18:02:26,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 388 [2022-11-25 18:02:26,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 347 transitions, 4905 flow. Second operand has 24 states, 24 states have (on average 125.625) internal successors, (3015), 24 states have internal predecessors, (3015), 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) [2022-11-25 18:02:26,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:26,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 388 [2022-11-25 18:02:26,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:30,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:32,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:34,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:02:35,033 INFO L130 PetriNetUnfolder]: 1738/3109 cut-off events. [2022-11-25 18:02:35,034 INFO L131 PetriNetUnfolder]: For 25477/25549 co-relation queries the response was YES. [2022-11-25 18:02:35,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22414 conditions, 3109 events. 1738/3109 cut-off events. For 25477/25549 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19563 event pairs, 357 based on Foata normal form. 67/3167 useless extension candidates. Maximal degree in co-relation 22341. Up to 2732 conditions per place. [2022-11-25 18:02:35,065 INFO L137 encePairwiseOnDemand]: 380/388 looper letters, 294 selfloop transitions, 96 changer transitions 1/400 dead transitions. [2022-11-25 18:02:35,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 400 transitions, 6271 flow [2022-11-25 18:02:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 18:02:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 18:02:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2448 transitions. [2022-11-25 18:02:35,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33206728160607707 [2022-11-25 18:02:35,071 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2448 transitions. [2022-11-25 18:02:35,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2448 transitions. [2022-11-25 18:02:35,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:35,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2448 transitions. [2022-11-25 18:02:35,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 128.8421052631579) internal successors, (2448), 19 states have internal predecessors, (2448), 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) [2022-11-25 18:02:35,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 388.0) internal successors, (7760), 20 states have internal predecessors, (7760), 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) [2022-11-25 18:02:35,084 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 388.0) internal successors, (7760), 20 states have internal predecessors, (7760), 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) [2022-11-25 18:02:35,084 INFO L175 Difference]: Start difference. First operand has 160 places, 347 transitions, 4905 flow. Second operand 19 states and 2448 transitions. [2022-11-25 18:02:35,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 400 transitions, 6271 flow [2022-11-25 18:02:35,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 400 transitions, 5806 flow, removed 222 selfloop flow, removed 5 redundant places. [2022-11-25 18:02:35,229 INFO L231 Difference]: Finished difference. Result has 178 places, 364 transitions, 5003 flow [2022-11-25 18:02:35,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=4468, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5003, PETRI_PLACES=178, PETRI_TRANSITIONS=364} [2022-11-25 18:02:35,231 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2022-11-25 18:02:35,231 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 364 transitions, 5003 flow [2022-11-25 18:02:35,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 125.625) internal successors, (3015), 24 states have internal predecessors, (3015), 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) [2022-11-25 18:02:35,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:35,233 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:35,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:35,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 18:02:35,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:35,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:35,440 INFO L85 PathProgramCache]: Analyzing trace with hash 470833281, now seen corresponding path program 9 times [2022-11-25 18:02:35,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:35,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768436215] [2022-11-25 18:02:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:38,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768436215] [2022-11-25 18:02:38,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768436215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:38,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110690969] [2022-11-25 18:02:38,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:02:38,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:38,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:38,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:02:38,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:02:38,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:38,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 18:02:38,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:39,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-25 18:02:39,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2022-11-25 18:02:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:39,303 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-25 18:02:39,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:39,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2022-11-25 18:02:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:39,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:40,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:40,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 153 [2022-11-25 18:02:40,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:40,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 1656 treesize of output 1582 [2022-11-25 18:02:41,319 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:41,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 1330 treesize of output 1348 [2022-11-25 18:02:41,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:41,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 928 treesize of output 852 [2022-11-25 18:12:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:12:34,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110690969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:12:34,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:12:34,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2022-11-25 18:12:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018225141] [2022-11-25 18:12:34,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:12:34,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 18:12:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 18:12:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=751, Unknown=5, NotChecked=0, Total=870 [2022-11-25 18:12:37,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:39,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:42,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:42,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 388 [2022-11-25 18:12:42,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 364 transitions, 5003 flow. Second operand has 30 states, 30 states have (on average 105.66666666666667) internal successors, (3170), 30 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:42,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:42,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 388 [2022-11-25 18:12:42,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:44,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:45,740 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))))) (or (<= c_~size~0 .cse0) (< .cse0 0) (= (select .cse1 (+ (* .cse0 4) c_~f~0.offset)) (select .cse1 (+ (* (select .cse1 (+ c_~f~0.offset (* 4 (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4) c_~f~0.offset))))))) (= c_~x1~0 c_~x2~0)) is different from false [2022-11-25 18:12:45,878 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* c_~x2~0 4) c_~f~0.offset)) (.cse3 (+ (* c_~x1~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~f~0.base))) (let ((.cse1 (select .cse0 .cse3))) (or (= (select .cse0 (+ c_~f~0.offset (* .cse1 4))) (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 .cse2)))) 4) c_~f~0.offset))) (<= c_~size~0 .cse1) (< .cse1 0))))) (let ((.cse5 (select |c_#memory_int| c_~f~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (<= c_~size~0 .cse4) (< .cse4 0) (= (select .cse5 (+ c_~f~0.offset (* 4 (select .cse5 (+ (* (select .cse5 .cse2) 4) c_~f~0.offset))))) (select .cse5 (+ c_~f~0.offset (* .cse4 4))))))))) is different from false [2022-11-25 18:12:46,811 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| c_~f~0.base)) (.cse3 (+ (* c_~x1~0 4) c_~f~0.offset))) (let ((.cse2 (+ (* c_~x2~0 4) c_~f~0.offset)) (.cse4 (select .cse5 .cse3))) (and (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~f~0.base))) (let ((.cse1 (select .cse0 .cse3))) (or (= (select .cse0 (+ c_~f~0.offset (* .cse1 4))) (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 .cse2)))) 4) c_~f~0.offset))) (<= c_~size~0 .cse1) (< .cse1 0))))) (or (<= c_~size~0 .cse4) (< .cse4 0) (= (select .cse5 (+ c_~f~0.offset (* 4 (select .cse5 (+ (* (select .cse5 .cse2) 4) c_~f~0.offset))))) (select .cse5 (+ c_~f~0.offset (* .cse4 4))))) (or (< c_~x1~0 0) (= c_~x2~0 .cse4) (<= c_~size~0 c_~x1~0))))) is different from false [2022-11-25 18:12:52,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:54,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:12:56,124 INFO L130 PetriNetUnfolder]: 2157/3859 cut-off events. [2022-11-25 18:12:56,124 INFO L131 PetriNetUnfolder]: For 31842/31842 co-relation queries the response was YES. [2022-11-25 18:12:56,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27379 conditions, 3859 events. 2157/3859 cut-off events. For 31842/31842 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24886 event pairs, 470 based on Foata normal form. 2/3861 useless extension candidates. Maximal degree in co-relation 26378. Up to 2929 conditions per place. [2022-11-25 18:12:56,167 INFO L137 encePairwiseOnDemand]: 376/388 looper letters, 359 selfloop transitions, 161 changer transitions 1/521 dead transitions. [2022-11-25 18:12:56,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 521 transitions, 8008 flow [2022-11-25 18:12:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 18:12:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 18:12:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2944 transitions. [2022-11-25 18:12:56,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2810232913325697 [2022-11-25 18:12:56,175 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2944 transitions. [2022-11-25 18:12:56,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2944 transitions. [2022-11-25 18:12:56,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:56,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2944 transitions. [2022-11-25 18:12:56,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 109.03703703703704) internal successors, (2944), 27 states have internal predecessors, (2944), 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) [2022-11-25 18:12:56,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 388.0) internal successors, (10864), 28 states have internal predecessors, (10864), 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) [2022-11-25 18:12:56,192 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 388.0) internal successors, (10864), 28 states have internal predecessors, (10864), 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) [2022-11-25 18:12:56,193 INFO L175 Difference]: Start difference. First operand has 178 places, 364 transitions, 5003 flow. Second operand 27 states and 2944 transitions. [2022-11-25 18:12:56,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 521 transitions, 8008 flow [2022-11-25 18:12:56,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 521 transitions, 7769 flow, removed 60 selfloop flow, removed 10 redundant places. [2022-11-25 18:12:56,465 INFO L231 Difference]: Finished difference. Result has 201 places, 452 transitions, 6749 flow [2022-11-25 18:12:56,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6749, PETRI_PLACES=201, PETRI_TRANSITIONS=452} [2022-11-25 18:12:56,466 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2022-11-25 18:12:56,466 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 452 transitions, 6749 flow [2022-11-25 18:12:56,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 105.66666666666667) internal successors, (3170), 30 states have internal predecessors, (3170), 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) [2022-11-25 18:12:56,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:56,467 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:56,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:12:56,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:12:56,674 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:12:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:56,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1037756563, now seen corresponding path program 10 times [2022-11-25 18:12:56,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:56,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254437803] [2022-11-25 18:12:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:56,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:12:56,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254437803] [2022-11-25 18:12:56,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254437803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:12:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494303816] [2022-11-25 18:12:56,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:12:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:12:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:12:56,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:12:56,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:12:57,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:12:57,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:12:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:12:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:12:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:12:57,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:12:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:12:59,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494303816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:12:59,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:12:59,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-25 18:12:59,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188148086] [2022-11-25 18:12:59,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:12:59,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:12:59,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:12:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=167, Unknown=1, NotChecked=0, Total=210 [2022-11-25 18:13:01,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2022-11-25 18:13:01,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 452 transitions, 6749 flow. Second operand has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 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) [2022-11-25 18:13:01,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:13:01,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2022-11-25 18:13:01,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:13:20,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:24,592 INFO L130 PetriNetUnfolder]: 5419/9822 cut-off events. [2022-11-25 18:13:24,592 INFO L131 PetriNetUnfolder]: For 96583/96583 co-relation queries the response was YES. [2022-11-25 18:13:24,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74773 conditions, 9822 events. 5419/9822 cut-off events. For 96583/96583 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 74498 event pairs, 678 based on Foata normal form. 118/9940 useless extension candidates. Maximal degree in co-relation 73504. Up to 4263 conditions per place. [2022-11-25 18:13:24,703 INFO L137 encePairwiseOnDemand]: 383/388 looper letters, 666 selfloop transitions, 393 changer transitions 0/1059 dead transitions. [2022-11-25 18:13:24,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1059 transitions, 17882 flow [2022-11-25 18:13:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 18:13:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 18:13:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2952 transitions. [2022-11-25 18:13:24,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.422680412371134 [2022-11-25 18:13:24,710 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2952 transitions. [2022-11-25 18:13:24,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2952 transitions. [2022-11-25 18:13:24,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:13:24,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2952 transitions. [2022-11-25 18:13:24,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 164.0) internal successors, (2952), 18 states have internal predecessors, (2952), 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) [2022-11-25 18:13:24,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 388.0) internal successors, (7372), 19 states have internal predecessors, (7372), 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) [2022-11-25 18:13:24,725 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 388.0) internal successors, (7372), 19 states have internal predecessors, (7372), 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) [2022-11-25 18:13:24,725 INFO L175 Difference]: Start difference. First operand has 201 places, 452 transitions, 6749 flow. Second operand 18 states and 2952 transitions. [2022-11-25 18:13:24,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1059 transitions, 17882 flow [2022-11-25 18:13:25,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1059 transitions, 17513 flow, removed 158 selfloop flow, removed 11 redundant places. [2022-11-25 18:13:25,408 INFO L231 Difference]: Finished difference. Result has 216 places, 718 transitions, 12721 flow [2022-11-25 18:13:25,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=6544, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12721, PETRI_PLACES=216, PETRI_TRANSITIONS=718} [2022-11-25 18:13:25,409 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2022-11-25 18:13:25,409 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 718 transitions, 12721 flow [2022-11-25 18:13:25,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 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) [2022-11-25 18:13:25,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:13:25,410 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:13:25,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:13:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:13:25,617 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:13:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:13:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1297396549, now seen corresponding path program 11 times [2022-11-25 18:13:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:13:25,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489720799] [2022-11-25 18:13:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:13:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:13:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:13:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:13:25,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:13:25,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489720799] [2022-11-25 18:13:25,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489720799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:13:25,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713343630] [2022-11-25 18:13:25,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:13:25,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:13:25,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:13:25,915 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:13:25,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:13:26,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:13:26,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:13:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:13:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:13:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:13:26,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:13:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:13:26,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713343630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:13:26,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:13:26,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 18:13:26,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014910266] [2022-11-25 18:13:26,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:13:26,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:13:26,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:13:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:13:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:13:28,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:13:29,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2022-11-25 18:13:29,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 718 transitions, 12721 flow. Second operand has 16 states, 16 states have (on average 157.9375) internal successors, (2527), 16 states have internal predecessors, (2527), 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) [2022-11-25 18:13:29,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:13:29,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2022-11-25 18:13:29,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:13:34,336 INFO L130 PetriNetUnfolder]: 5467/10101 cut-off events. [2022-11-25 18:13:34,336 INFO L131 PetriNetUnfolder]: For 168287/168287 co-relation queries the response was YES. [2022-11-25 18:13:34,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85953 conditions, 10101 events. 5467/10101 cut-off events. For 168287/168287 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 80763 event pairs, 943 based on Foata normal form. 100/10201 useless extension candidates. Maximal degree in co-relation 84591. Up to 4399 conditions per place. [2022-11-25 18:13:34,445 INFO L137 encePairwiseOnDemand]: 382/388 looper letters, 866 selfloop transitions, 314 changer transitions 43/1223 dead transitions. [2022-11-25 18:13:34,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1223 transitions, 24133 flow [2022-11-25 18:13:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:13:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:13:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2587 transitions. [2022-11-25 18:13:34,451 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4167203608247423 [2022-11-25 18:13:34,451 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2587 transitions. [2022-11-25 18:13:34,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2587 transitions. [2022-11-25 18:13:34,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:13:34,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2587 transitions. [2022-11-25 18:13:34,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 161.6875) internal successors, (2587), 16 states have internal predecessors, (2587), 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) [2022-11-25 18:13:34,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 388.0) internal successors, (6596), 17 states have internal predecessors, (6596), 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) [2022-11-25 18:13:34,464 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 388.0) internal successors, (6596), 17 states have internal predecessors, (6596), 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) [2022-11-25 18:13:34,464 INFO L175 Difference]: Start difference. First operand has 216 places, 718 transitions, 12721 flow. Second operand 16 states and 2587 transitions. [2022-11-25 18:13:34,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1223 transitions, 24133 flow [2022-11-25 18:13:35,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1223 transitions, 23471 flow, removed 209 selfloop flow, removed 4 redundant places. [2022-11-25 18:13:35,748 INFO L231 Difference]: Finished difference. Result has 233 places, 871 transitions, 15917 flow [2022-11-25 18:13:35,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=12174, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=15917, PETRI_PLACES=233, PETRI_TRANSITIONS=871} [2022-11-25 18:13:35,749 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2022-11-25 18:13:35,749 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 871 transitions, 15917 flow [2022-11-25 18:13:35,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.9375) internal successors, (2527), 16 states have internal predecessors, (2527), 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) [2022-11-25 18:13:35,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:13:35,750 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:13:35,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:13:35,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:13:35,950 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:13:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:13:35,951 INFO L85 PathProgramCache]: Analyzing trace with hash -71114085, now seen corresponding path program 12 times [2022-11-25 18:13:35,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:13:35,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490456928] [2022-11-25 18:13:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:13:35,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:13:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:13:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:13:36,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:13:36,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490456928] [2022-11-25 18:13:36,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490456928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:13:36,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695829658] [2022-11-25 18:13:36,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:13:36,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:13:36,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:13:36,191 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:13:36,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ff6e10-b7f4-4d0e-975e-8bf8ef86d8da/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:13:36,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:13:36,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:13:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:13:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:13:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:13:36,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:13:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:13:36,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695829658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:13:36,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:13:36,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 18:13:36,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186190593] [2022-11-25 18:13:36,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:13:36,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:13:36,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:13:36,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:13:36,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:13:37,564 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 388 [2022-11-25 18:13:37,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 871 transitions, 15917 flow. Second operand has 16 states, 16 states have (on average 158.0625) internal successors, (2529), 16 states have internal predecessors, (2529), 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) [2022-11-25 18:13:37,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:13:37,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 388 [2022-11-25 18:13:37,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand