./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro --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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- 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-8393723 [2022-11-18 20:07:23,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:07:23,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:07:23,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:07:23,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:07:23,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:07:23,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:07:23,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:07:23,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:07:23,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:07:23,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:07:23,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:07:23,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:07:23,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:07:23,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:07:23,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:07:23,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:07:23,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:07:23,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:07:23,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:07:23,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:07:23,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:07:23,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:07:23,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:07:23,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:07:23,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:07:23,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:07:23,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:07:23,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:07:23,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:07:23,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:07:23,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:07:23,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:07:23,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:07:23,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:07:23,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:07:23,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:07:23,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:07:23,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:07:23,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:07:23,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:07:23,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:07:23,937 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:07:23,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:07:23,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:07:23,938 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:07:23,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:07:23,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:07:23,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:07:23,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:07:23,941 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:07:23,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:07:23,942 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:07:23,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:07:23,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:07:23,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:07:23,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:07:23,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:07:23,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:07:23,944 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:07:23,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:07:23,945 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:07:23,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:07:23,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:07:23,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:07:23,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:07:23,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:07:23,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:07:23,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:07:23,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:07:23,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:07:23,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:07:23,948 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:07:23,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:07:23,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:07:23,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-18 20:07:24,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:07:24,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:07:24,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:07:24,317 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:07:24,318 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:07:24,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-18 20:07:24,418 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/data/a7ab2551c/85982ba5928d40bd9356b0df8a6c2ad8/FLAGb808905e0 [2022-11-18 20:07:24,986 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:07:24,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-18 20:07:24,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/data/a7ab2551c/85982ba5928d40bd9356b0df8a6c2ad8/FLAGb808905e0 [2022-11-18 20:07:25,374 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/data/a7ab2551c/85982ba5928d40bd9356b0df8a6c2ad8 [2022-11-18 20:07:25,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:07:25,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:07:25,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:07:25,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:07:25,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:07:25,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561a213f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25, skipping insertion in model container [2022-11-18 20:07:25,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:07:25,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:07:25,696 WARN L234 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_fdf11015-da01-4ec1-a65f-64df5bea9f42/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-18 20:07:25,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:07:25,731 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:07:25,777 WARN L234 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_fdf11015-da01-4ec1-a65f-64df5bea9f42/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-18 20:07:25,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:07:25,813 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:07:25,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25 WrapperNode [2022-11-18 20:07:25,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:07:25,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:07:25,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:07:25,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:07:25,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,895 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 315 [2022-11-18 20:07:25,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:07:25,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:07:25,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:07:25,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:07:25,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,957 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:07:25,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:07:25,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:07:25,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:07:25,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (1/1) ... [2022-11-18 20:07:25,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:07:25,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:07:26,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:07:26,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:07:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:07:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:07:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:07:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:07:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:07:26,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:07:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:07:26,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:07:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 20:07:26,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 20:07:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-18 20:07:26,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-18 20:07:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:07:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:07:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:07:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:07:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:07:26,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:07:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:07:26,057 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:07:26,207 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:07:26,209 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:07:26,834 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:07:27,138 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:07:27,138 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-18 20:07:27,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:07:27 BoogieIcfgContainer [2022-11-18 20:07:27,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:07:27,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:07:27,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:07:27,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:07:27,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:07:25" (1/3) ... [2022-11-18 20:07:27,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a988351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:07:27, skipping insertion in model container [2022-11-18 20:07:27,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:07:25" (2/3) ... [2022-11-18 20:07:27,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a988351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:07:27, skipping insertion in model container [2022-11-18 20:07:27,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:07:27" (3/3) ... [2022-11-18 20:07:27,167 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-11-18 20:07:27,179 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:07:27,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:07:27,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:07:27,190 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:07:27,391 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 20:07:27,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 245 transitions, 522 flow [2022-11-18 20:07:27,610 INFO L130 PetriNetUnfolder]: 19/241 cut-off events. [2022-11-18 20:07:27,611 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 20:07:27,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 241 events. 19/241 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 202. Up to 2 conditions per place. [2022-11-18 20:07:27,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 245 transitions, 522 flow [2022-11-18 20:07:27,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 228 transitions, 480 flow [2022-11-18 20:07:27,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:07:27,640 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;@6a0a2a01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:07:27,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-18 20:07:27,703 INFO L130 PetriNetUnfolder]: 19/227 cut-off events. [2022-11-18 20:07:27,703 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 20:07:27,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:07:27,704 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:27,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:07:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1330795915, now seen corresponding path program 1 times [2022-11-18 20:07:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:27,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877660483] [2022-11-18 20:07:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:27,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:07:28,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:07:28,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877660483] [2022-11-18 20:07:28,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877660483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:07:28,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:07:28,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:07:28,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438489125] [2022-11-18 20:07:28,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:07:28,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:07:28,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:28,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:07:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:07:28,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 245 [2022-11-18 20:07:28,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 228 transitions, 480 flow. Second operand has 2 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 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) [2022-11-18 20:07:28,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:07:28,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 245 [2022-11-18 20:07:28,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:07:28,397 INFO L130 PetriNetUnfolder]: 123/530 cut-off events. [2022-11-18 20:07:28,398 INFO L131 PetriNetUnfolder]: For 105/106 co-relation queries the response was YES. [2022-11-18 20:07:28,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 530 events. 123/530 cut-off events. For 105/106 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1704 event pairs, 51 based on Foata normal form. 126/594 useless extension candidates. Maximal degree in co-relation 504. Up to 163 conditions per place. [2022-11-18 20:07:28,406 INFO L137 encePairwiseOnDemand]: 232/245 looper letters, 12 selfloop transitions, 0 changer transitions 7/215 dead transitions. [2022-11-18 20:07:28,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 215 transitions, 478 flow [2022-11-18 20:07:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:07:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:07:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-11-18 20:07:28,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9448979591836735 [2022-11-18 20:07:28,421 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-11-18 20:07:28,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-11-18 20:07:28,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:07:28,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-11-18 20:07:28,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 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) [2022-11-18 20:07:28,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2022-11-18 20:07:28,437 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2022-11-18 20:07:28,439 INFO L175 Difference]: Start difference. First operand has 222 places, 228 transitions, 480 flow. Second operand 2 states and 463 transitions. [2022-11-18 20:07:28,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 215 transitions, 478 flow [2022-11-18 20:07:28,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 215 transitions, 462 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-18 20:07:28,449 INFO L231 Difference]: Finished difference. Result has 215 places, 208 transitions, 424 flow [2022-11-18 20:07:28,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=424, PETRI_PLACES=215, PETRI_TRANSITIONS=208} [2022-11-18 20:07:28,456 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, -7 predicate places. [2022-11-18 20:07:28,456 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 208 transitions, 424 flow [2022-11-18 20:07:28,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 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) [2022-11-18 20:07:28,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:07:28,457 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:07:28,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:07:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash 376234411, now seen corresponding path program 1 times [2022-11-18 20:07:28,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:28,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196863942] [2022-11-18 20:07:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:28,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:07:29,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:07:29,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196863942] [2022-11-18 20:07:29,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196863942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:07:29,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:07:29,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:07:29,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972183183] [2022-11-18 20:07:29,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:07:29,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:07:29,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:29,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:07:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:07:29,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 245 [2022-11-18 20:07:29,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 208 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 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) [2022-11-18 20:07:29,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:07:29,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 245 [2022-11-18 20:07:29,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:07:30,277 INFO L130 PetriNetUnfolder]: 599/1332 cut-off events. [2022-11-18 20:07:30,277 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-11-18 20:07:30,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 1332 events. 599/1332 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6626 event pairs, 88 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 2241. Up to 375 conditions per place. [2022-11-18 20:07:30,290 INFO L137 encePairwiseOnDemand]: 237/245 looper letters, 70 selfloop transitions, 8 changer transitions 0/237 dead transitions. [2022-11-18 20:07:30,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 237 transitions, 649 flow [2022-11-18 20:07:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:07:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:07:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1480 transitions. [2022-11-18 20:07:30,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-11-18 20:07:30,296 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1480 transitions. [2022-11-18 20:07:30,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1480 transitions. [2022-11-18 20:07:30,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:07:30,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1480 transitions. [2022-11-18 20:07:30,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 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) [2022-11-18 20:07:30,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 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) [2022-11-18 20:07:30,309 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 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) [2022-11-18 20:07:30,310 INFO L175 Difference]: Start difference. First operand has 215 places, 208 transitions, 424 flow. Second operand 8 states and 1480 transitions. [2022-11-18 20:07:30,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 237 transitions, 649 flow [2022-11-18 20:07:30,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 237 transitions, 649 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:07:30,323 INFO L231 Difference]: Finished difference. Result has 218 places, 212 transitions, 467 flow [2022-11-18 20:07:30,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=467, PETRI_PLACES=218, PETRI_TRANSITIONS=212} [2022-11-18 20:07:30,324 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, -4 predicate places. [2022-11-18 20:07:30,325 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 212 transitions, 467 flow [2022-11-18 20:07:30,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 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) [2022-11-18 20:07:30,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:07:30,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:30,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:07:30,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:07:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash -374302530, now seen corresponding path program 1 times [2022-11-18 20:07:30,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:30,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280293873] [2022-11-18 20:07:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:30,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:07:31,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:07:31,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280293873] [2022-11-18 20:07:31,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280293873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:07:31,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:07:31,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:07:31,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246292876] [2022-11-18 20:07:31,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:07:31,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:07:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:31,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:07:31,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:07:31,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 245 [2022-11-18 20:07:31,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 212 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 167.125) internal successors, (1337), 8 states have internal predecessors, (1337), 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) [2022-11-18 20:07:31,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:07:31,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 245 [2022-11-18 20:07:31,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:07:32,469 INFO L130 PetriNetUnfolder]: 2231/4309 cut-off events. [2022-11-18 20:07:32,469 INFO L131 PetriNetUnfolder]: For 1460/1461 co-relation queries the response was YES. [2022-11-18 20:07:32,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4309 events. 2231/4309 cut-off events. For 1460/1461 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 28460 event pairs, 461 based on Foata normal form. 75/4053 useless extension candidates. Maximal degree in co-relation 8634. Up to 1156 conditions per place. [2022-11-18 20:07:32,508 INFO L137 encePairwiseOnDemand]: 235/245 looper letters, 112 selfloop transitions, 16 changer transitions 2/274 dead transitions. [2022-11-18 20:07:32,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 274 transitions, 904 flow [2022-11-18 20:07:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:07:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:07:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1568 transitions. [2022-11-18 20:07:32,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2022-11-18 20:07:32,515 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1568 transitions. [2022-11-18 20:07:32,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1568 transitions. [2022-11-18 20:07:32,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:07:32,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1568 transitions. [2022-11-18 20:07:32,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.22222222222223) internal successors, (1568), 9 states have internal predecessors, (1568), 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) [2022-11-18 20:07:32,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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) [2022-11-18 20:07:32,527 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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) [2022-11-18 20:07:32,527 INFO L175 Difference]: Start difference. First operand has 218 places, 212 transitions, 467 flow. Second operand 9 states and 1568 transitions. [2022-11-18 20:07:32,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 274 transitions, 904 flow [2022-11-18 20:07:32,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 274 transitions, 893 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:07:32,537 INFO L231 Difference]: Finished difference. Result has 227 places, 222 transitions, 575 flow [2022-11-18 20:07:32,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=575, PETRI_PLACES=227, PETRI_TRANSITIONS=222} [2022-11-18 20:07:32,540 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 5 predicate places. [2022-11-18 20:07:32,540 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 222 transitions, 575 flow [2022-11-18 20:07:32,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.125) internal successors, (1337), 8 states have internal predecessors, (1337), 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) [2022-11-18 20:07:32,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:07:32,542 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:32,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:07:32,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:07:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:32,543 INFO L85 PathProgramCache]: Analyzing trace with hash -642356833, now seen corresponding path program 1 times [2022-11-18 20:07:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:32,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548704950] [2022-11-18 20:07:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:07:32,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:07:32,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548704950] [2022-11-18 20:07:32,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548704950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:07:32,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:07:32,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:07:32,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441466369] [2022-11-18 20:07:32,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:07:32,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:07:32,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:32,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:07:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:07:32,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 245 [2022-11-18 20:07:32,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 222 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 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) [2022-11-18 20:07:32,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:07:32,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 245 [2022-11-18 20:07:32,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:07:33,629 INFO L130 PetriNetUnfolder]: 454/1545 cut-off events. [2022-11-18 20:07:33,630 INFO L131 PetriNetUnfolder]: For 1679/1710 co-relation queries the response was YES. [2022-11-18 20:07:33,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3238 conditions, 1545 events. 454/1545 cut-off events. For 1679/1710 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8925 event pairs, 142 based on Foata normal form. 42/1426 useless extension candidates. Maximal degree in co-relation 3226. Up to 582 conditions per place. [2022-11-18 20:07:33,650 INFO L137 encePairwiseOnDemand]: 234/245 looper letters, 43 selfloop transitions, 8 changer transitions 22/248 dead transitions. [2022-11-18 20:07:33,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 248 transitions, 787 flow [2022-11-18 20:07:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:07:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:07:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1802 transitions. [2022-11-18 20:07:33,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8172335600907029 [2022-11-18 20:07:33,662 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1802 transitions. [2022-11-18 20:07:33,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1802 transitions. [2022-11-18 20:07:33,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:07:33,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1802 transitions. [2022-11-18 20:07:33,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.22222222222223) internal successors, (1802), 9 states have internal predecessors, (1802), 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) [2022-11-18 20:07:33,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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) [2022-11-18 20:07:33,675 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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) [2022-11-18 20:07:33,675 INFO L175 Difference]: Start difference. First operand has 227 places, 222 transitions, 575 flow. Second operand 9 states and 1802 transitions. [2022-11-18 20:07:33,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 248 transitions, 787 flow [2022-11-18 20:07:33,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 248 transitions, 776 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-18 20:07:33,687 INFO L231 Difference]: Finished difference. Result has 234 places, 223 transitions, 600 flow [2022-11-18 20:07:33,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=600, PETRI_PLACES=234, PETRI_TRANSITIONS=223} [2022-11-18 20:07:33,689 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 12 predicate places. [2022-11-18 20:07:33,689 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 223 transitions, 600 flow [2022-11-18 20:07:33,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 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) [2022-11-18 20:07:33,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:07:33,691 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:33,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:07:33,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:07:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:33,692 INFO L85 PathProgramCache]: Analyzing trace with hash -894250892, now seen corresponding path program 1 times [2022-11-18 20:07:33,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:33,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83642069] [2022-11-18 20:07:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:33,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:07:36,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:07:36,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83642069] [2022-11-18 20:07:36,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83642069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:36,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889205518] [2022-11-18 20:07:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:36,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:07:36,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:07:36,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:07:36,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:07:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-18 20:07:37,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:37,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:07:37,354 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:07:37,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2022-11-18 20:07:38,493 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:07:38,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-18 20:07:38,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-18 20:07:40,417 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 [2022-11-18 20:07:40,638 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 [2022-11-18 20:07:40,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-18 20:07:41,126 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 [2022-11-18 20:07:41,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-11-18 20:07:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:07:41,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:46,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:07:46,026 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 73 treesize of output 61 [2022-11-18 20:07:46,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1267 treesize of output 1235 [2022-11-18 20:07:46,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1235 treesize of output 1139 [2022-11-18 20:07:46,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1139 treesize of output 947 [2022-11-18 20:07:46,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 947 treesize of output 899 [2022-11-18 20:07:46,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 461 treesize of output 437 [2022-11-18 20:07:48,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:07:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:07:48,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889205518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:07:48,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:07:48,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32, 30] total 74 [2022-11-18 20:07:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068101501] [2022-11-18 20:07:48,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:48,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-18 20:07:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-18 20:07:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=4493, Unknown=32, NotChecked=0, Total=5402 [2022-11-18 20:07:48,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 245 [2022-11-18 20:07:48,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 223 transitions, 600 flow. Second operand has 74 states, 74 states have (on average 107.66216216216216) internal successors, (7967), 74 states have internal predecessors, (7967), 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) [2022-11-18 20:07:48,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:07:48,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 245 [2022-11-18 20:07:48,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:08:12,869 INFO L130 PetriNetUnfolder]: 11273/21010 cut-off events. [2022-11-18 20:08:12,869 INFO L131 PetriNetUnfolder]: For 25235/25244 co-relation queries the response was YES. [2022-11-18 20:08:12,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53753 conditions, 21010 events. 11273/21010 cut-off events. For 25235/25244 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 180839 event pairs, 334 based on Foata normal form. 137/20088 useless extension candidates. Maximal degree in co-relation 53739. Up to 5940 conditions per place. [2022-11-18 20:08:13,102 INFO L137 encePairwiseOnDemand]: 202/245 looper letters, 707 selfloop transitions, 265 changer transitions 36/1104 dead transitions. [2022-11-18 20:08:13,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1104 transitions, 5931 flow [2022-11-18 20:08:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-18 20:08:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-11-18 20:08:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 11452 transitions. [2022-11-18 20:08:13,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4628005657708628 [2022-11-18 20:08:13,129 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 11452 transitions. [2022-11-18 20:08:13,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 11452 transitions. [2022-11-18 20:08:13,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:08:13,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 11452 transitions. [2022-11-18 20:08:13,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 113.38613861386139) internal successors, (11452), 101 states have internal predecessors, (11452), 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) [2022-11-18 20:08:13,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 245.0) internal successors, (24990), 102 states have internal predecessors, (24990), 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) [2022-11-18 20:08:13,211 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 245.0) internal successors, (24990), 102 states have internal predecessors, (24990), 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) [2022-11-18 20:08:13,212 INFO L175 Difference]: Start difference. First operand has 234 places, 223 transitions, 600 flow. Second operand 101 states and 11452 transitions. [2022-11-18 20:08:13,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1104 transitions, 5931 flow [2022-11-18 20:08:13,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1104 transitions, 5831 flow, removed 40 selfloop flow, removed 6 redundant places. [2022-11-18 20:08:13,308 INFO L231 Difference]: Finished difference. Result has 363 places, 530 transitions, 3204 flow [2022-11-18 20:08:13,309 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=3204, PETRI_PLACES=363, PETRI_TRANSITIONS=530} [2022-11-18 20:08:13,310 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 141 predicate places. [2022-11-18 20:08:13,310 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 530 transitions, 3204 flow [2022-11-18 20:08:13,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 107.66216216216216) internal successors, (7967), 74 states have internal predecessors, (7967), 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) [2022-11-18 20:08:13,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:08:13,314 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:13,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:13,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:13,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:08:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1042410773, now seen corresponding path program 2 times [2022-11-18 20:08:13,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:13,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790151653] [2022-11-18 20:08:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:13,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:08:14,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790151653] [2022-11-18 20:08:14,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790151653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350595473] [2022-11-18 20:08:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:08:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:14,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:14,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:08:14,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:08:14,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:14,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:08:14,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:08:15,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:08:15,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350595473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:15,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:15,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 25 [2022-11-18 20:08:15,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989095789] [2022-11-18 20:08:15,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:15,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:08:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:08:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:08:15,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 245 [2022-11-18 20:08:15,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 530 transitions, 3204 flow. Second operand has 25 states, 25 states have (on average 174.72) internal successors, (4368), 25 states have internal predecessors, (4368), 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) [2022-11-18 20:08:15,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:08:15,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 245 [2022-11-18 20:08:15,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:08:22,335 INFO L130 PetriNetUnfolder]: 11058/22620 cut-off events. [2022-11-18 20:08:22,335 INFO L131 PetriNetUnfolder]: For 48138/48902 co-relation queries the response was YES. [2022-11-18 20:08:22,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66881 conditions, 22620 events. 11058/22620 cut-off events. For 48138/48902 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 218193 event pairs, 598 based on Foata normal form. 548/21657 useless extension candidates. Maximal degree in co-relation 66831. Up to 5761 conditions per place. [2022-11-18 20:08:22,687 INFO L137 encePairwiseOnDemand]: 234/245 looper letters, 475 selfloop transitions, 302 changer transitions 4/996 dead transitions. [2022-11-18 20:08:22,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 996 transitions, 8201 flow [2022-11-18 20:08:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:08:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-18 20:08:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5055 transitions. [2022-11-18 20:08:22,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7368804664723032 [2022-11-18 20:08:22,698 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5055 transitions. [2022-11-18 20:08:22,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5055 transitions. [2022-11-18 20:08:22,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:08:22,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5055 transitions. [2022-11-18 20:08:22,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 180.53571428571428) internal successors, (5055), 28 states have internal predecessors, (5055), 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) [2022-11-18 20:08:22,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 245.0) internal successors, (7105), 29 states have internal predecessors, (7105), 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) [2022-11-18 20:08:22,731 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 245.0) internal successors, (7105), 29 states have internal predecessors, (7105), 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) [2022-11-18 20:08:22,731 INFO L175 Difference]: Start difference. First operand has 363 places, 530 transitions, 3204 flow. Second operand 28 states and 5055 transitions. [2022-11-18 20:08:22,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 996 transitions, 8201 flow [2022-11-18 20:08:23,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 996 transitions, 7323 flow, removed 426 selfloop flow, removed 24 redundant places. [2022-11-18 20:08:23,129 INFO L231 Difference]: Finished difference. Result has 369 places, 691 transitions, 5266 flow [2022-11-18 20:08:23,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5266, PETRI_PLACES=369, PETRI_TRANSITIONS=691} [2022-11-18 20:08:23,131 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 147 predicate places. [2022-11-18 20:08:23,131 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 691 transitions, 5266 flow [2022-11-18 20:08:23,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 174.72) internal successors, (4368), 25 states have internal predecessors, (4368), 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) [2022-11-18 20:08:23,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:08:23,133 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:23,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:23,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:08:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash 847868953, now seen corresponding path program 3 times [2022-11-18 20:08:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:23,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18159462] [2022-11-18 20:08:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:08:23,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:23,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18159462] [2022-11-18 20:08:23,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18159462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:23,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899088461] [2022-11-18 20:08:23,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:08:23,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:23,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:23,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:23,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:08:24,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:08:24,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:08:24,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:08:24,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:08:24,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899088461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:24,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:24,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-18 20:08:24,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782823313] [2022-11-18 20:08:24,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:24,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:08:24,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:24,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:08:24,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:08:24,899 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 245 [2022-11-18 20:08:24,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 691 transitions, 5266 flow. Second operand has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 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) [2022-11-18 20:08:24,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:08:24,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 245 [2022-11-18 20:08:24,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:08:29,386 INFO L130 PetriNetUnfolder]: 5065/12690 cut-off events. [2022-11-18 20:08:29,386 INFO L131 PetriNetUnfolder]: For 53073/53663 co-relation queries the response was YES. [2022-11-18 20:08:29,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39657 conditions, 12690 events. 5065/12690 cut-off events. For 53073/53663 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 125179 event pairs, 1059 based on Foata normal form. 429/12013 useless extension candidates. Maximal degree in co-relation 39603. Up to 4148 conditions per place. [2022-11-18 20:08:29,680 INFO L137 encePairwiseOnDemand]: 227/245 looper letters, 360 selfloop transitions, 49 changer transitions 1/669 dead transitions. [2022-11-18 20:08:29,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 669 transitions, 5716 flow [2022-11-18 20:08:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:08:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:08:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3404 transitions. [2022-11-18 20:08:29,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7718820861678004 [2022-11-18 20:08:29,694 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3404 transitions. [2022-11-18 20:08:29,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3404 transitions. [2022-11-18 20:08:29,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:08:29,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3404 transitions. [2022-11-18 20:08:29,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.11111111111111) internal successors, (3404), 18 states have internal predecessors, (3404), 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) [2022-11-18 20:08:29,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 245.0) internal successors, (4655), 19 states have internal predecessors, (4655), 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) [2022-11-18 20:08:29,715 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 245.0) internal successors, (4655), 19 states have internal predecessors, (4655), 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) [2022-11-18 20:08:29,715 INFO L175 Difference]: Start difference. First operand has 369 places, 691 transitions, 5266 flow. Second operand 18 states and 3404 transitions. [2022-11-18 20:08:29,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 669 transitions, 5716 flow [2022-11-18 20:08:30,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 669 transitions, 5416 flow, removed 142 selfloop flow, removed 6 redundant places. [2022-11-18 20:08:30,027 INFO L231 Difference]: Finished difference. Result has 380 places, 607 transitions, 4387 flow [2022-11-18 20:08:30,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=4076, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4387, PETRI_PLACES=380, PETRI_TRANSITIONS=607} [2022-11-18 20:08:30,028 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 158 predicate places. [2022-11-18 20:08:30,028 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 607 transitions, 4387 flow [2022-11-18 20:08:30,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 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) [2022-11-18 20:08:30,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:08:30,029 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:30,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:30,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:08:30,239 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:08:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:30,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1150958275, now seen corresponding path program 1 times [2022-11-18 20:08:30,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:30,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291485587] [2022-11-18 20:08:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:30,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:08:30,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291485587] [2022-11-18 20:08:30,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291485587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:08:30,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:08:30,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:08:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448958805] [2022-11-18 20:08:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:08:30,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:08:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:08:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:08:30,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 245 [2022-11-18 20:08:30,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 607 transitions, 4387 flow. Second operand has 6 states, 6 states have (on average 198.5) internal successors, (1191), 6 states have internal predecessors, (1191), 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) [2022-11-18 20:08:30,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:08:30,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 245 [2022-11-18 20:08:30,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:08:35,251 INFO L130 PetriNetUnfolder]: 5289/15805 cut-off events. [2022-11-18 20:08:35,251 INFO L131 PetriNetUnfolder]: For 62736/63615 co-relation queries the response was YES. [2022-11-18 20:08:35,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45495 conditions, 15805 events. 5289/15805 cut-off events. For 62736/63615 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 175041 event pairs, 1064 based on Foata normal form. 1132/15421 useless extension candidates. Maximal degree in co-relation 45439. Up to 5600 conditions per place. [2022-11-18 20:08:35,461 INFO L137 encePairwiseOnDemand]: 236/245 looper letters, 364 selfloop transitions, 9 changer transitions 46/740 dead transitions. [2022-11-18 20:08:35,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 740 transitions, 6604 flow [2022-11-18 20:08:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:08:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:08:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1406 transitions. [2022-11-18 20:08:35,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8198250728862974 [2022-11-18 20:08:35,464 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1406 transitions. [2022-11-18 20:08:35,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1406 transitions. [2022-11-18 20:08:35,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:08:35,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1406 transitions. [2022-11-18 20:08:35,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 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) [2022-11-18 20:08:35,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 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) [2022-11-18 20:08:35,474 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 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) [2022-11-18 20:08:35,475 INFO L175 Difference]: Start difference. First operand has 380 places, 607 transitions, 4387 flow. Second operand 7 states and 1406 transitions. [2022-11-18 20:08:35,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 740 transitions, 6604 flow [2022-11-18 20:08:36,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 740 transitions, 6467 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-11-18 20:08:36,022 INFO L231 Difference]: Finished difference. Result has 375 places, 598 transitions, 4277 flow [2022-11-18 20:08:36,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=375, PETRI_TRANSITIONS=598} [2022-11-18 20:08:36,023 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 153 predicate places. [2022-11-18 20:08:36,023 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 598 transitions, 4277 flow [2022-11-18 20:08:36,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.5) internal successors, (1191), 6 states have internal predecessors, (1191), 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) [2022-11-18 20:08:36,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:08:36,025 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:36,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:08:36,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:08:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:36,026 INFO L85 PathProgramCache]: Analyzing trace with hash -789534941, now seen corresponding path program 4 times [2022-11-18 20:08:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:36,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293999103] [2022-11-18 20:08:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:36,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:08:40,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:40,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293999103] [2022-11-18 20:08:40,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293999103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:40,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776736702] [2022-11-18 20:08:40,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:08:40,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:40,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:40,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:40,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:08:40,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:08:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:08:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:08:43,091 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 18 treesize of output 20 [2022-11-18 20:08:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:08:43,346 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 18 treesize of output 20 [2022-11-18 20:08:43,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:08:43,455 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 18 treesize of output 20 [2022-11-18 20:08:43,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 20:08:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:08:43,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:46,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:08:46,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 654 [2022-11-18 20:08:46,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 638 treesize of output 542 [2022-11-18 20:08:46,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 259 [2022-11-18 20:08:46,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 518 treesize of output 470 [2022-11-18 20:08:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:50,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776736702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:50,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:50,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 21] total 62 [2022-11-18 20:08:50,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436976342] [2022-11-18 20:08:50,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:50,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 20:08:50,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 20:08:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=3475, Unknown=16, NotChecked=0, Total=3782 [2022-11-18 20:08:50,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 245 [2022-11-18 20:08:50,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 598 transitions, 4277 flow. Second operand has 62 states, 62 states have (on average 118.1774193548387) internal successors, (7327), 62 states have internal predecessors, (7327), 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) [2022-11-18 20:08:50,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:08:50,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 245 [2022-11-18 20:08:50,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:09:15,119 INFO L130 PetriNetUnfolder]: 14005/30985 cut-off events. [2022-11-18 20:09:15,119 INFO L131 PetriNetUnfolder]: For 137442/140231 co-relation queries the response was YES. [2022-11-18 20:09:15,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108805 conditions, 30985 events. 14005/30985 cut-off events. For 137442/140231 co-relation queries the response was YES. Maximal size of possible extension queue 1188. Compared 319504 event pairs, 874 based on Foata normal form. 782/29781 useless extension candidates. Maximal degree in co-relation 108749. Up to 9365 conditions per place. [2022-11-18 20:09:15,586 INFO L137 encePairwiseOnDemand]: 204/245 looper letters, 681 selfloop transitions, 342 changer transitions 145/1272 dead transitions. [2022-11-18 20:09:15,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1272 transitions, 11655 flow [2022-11-18 20:09:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 20:09:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-11-18 20:09:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 10126 transitions. [2022-11-18 20:09:15,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4862424969987995 [2022-11-18 20:09:15,619 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 10126 transitions. [2022-11-18 20:09:15,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 10126 transitions. [2022-11-18 20:09:15,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:09:15,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 10126 transitions. [2022-11-18 20:09:15,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 119.12941176470588) internal successors, (10126), 85 states have internal predecessors, (10126), 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) [2022-11-18 20:09:15,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 245.0) internal successors, (21070), 86 states have internal predecessors, (21070), 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) [2022-11-18 20:09:15,690 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 245.0) internal successors, (21070), 86 states have internal predecessors, (21070), 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) [2022-11-18 20:09:15,690 INFO L175 Difference]: Start difference. First operand has 375 places, 598 transitions, 4277 flow. Second operand 85 states and 10126 transitions. [2022-11-18 20:09:15,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1272 transitions, 11655 flow [2022-11-18 20:09:17,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1272 transitions, 11636 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:09:17,412 INFO L231 Difference]: Finished difference. Result has 475 places, 778 transitions, 7181 flow [2022-11-18 20:09:17,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=7181, PETRI_PLACES=475, PETRI_TRANSITIONS=778} [2022-11-18 20:09:17,414 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 253 predicate places. [2022-11-18 20:09:17,414 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 778 transitions, 7181 flow [2022-11-18 20:09:17,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 118.1774193548387) internal successors, (7327), 62 states have internal predecessors, (7327), 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) [2022-11-18 20:09:17,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:09:17,416 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:17,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:17,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:17,616 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:09:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:17,617 INFO L85 PathProgramCache]: Analyzing trace with hash -769648530, now seen corresponding path program 5 times [2022-11-18 20:09:17,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:17,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274719596] [2022-11-18 20:09:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:17,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:09:18,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:18,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274719596] [2022-11-18 20:09:18,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274719596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088183616] [2022-11-18 20:09:18,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:09:18,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:18,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:18,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:18,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:09:18,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 20:09:18,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:09:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:09:18,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:09:18,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:09:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088183616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:18,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:18,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-18 20:09:18,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373585951] [2022-11-18 20:09:18,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:18,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:09:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:09:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:09:18,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 245 [2022-11-18 20:09:18,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 778 transitions, 7181 flow. Second operand has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 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) [2022-11-18 20:09:18,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:09:18,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 245 [2022-11-18 20:09:18,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:09:25,693 INFO L130 PetriNetUnfolder]: 7127/19059 cut-off events. [2022-11-18 20:09:25,693 INFO L131 PetriNetUnfolder]: For 102537/103998 co-relation queries the response was YES. [2022-11-18 20:09:25,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67543 conditions, 19059 events. 7127/19059 cut-off events. For 102537/103998 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 206648 event pairs, 610 based on Foata normal form. 671/18151 useless extension candidates. Maximal degree in co-relation 67467. Up to 5761 conditions per place. [2022-11-18 20:09:26,046 INFO L137 encePairwiseOnDemand]: 236/245 looper letters, 358 selfloop transitions, 212 changer transitions 2/861 dead transitions. [2022-11-18 20:09:26,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 861 transitions, 9072 flow [2022-11-18 20:09:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:09:26,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:09:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1688 transitions. [2022-11-18 20:09:26,051 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7655328798185941 [2022-11-18 20:09:26,051 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1688 transitions. [2022-11-18 20:09:26,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1688 transitions. [2022-11-18 20:09:26,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:09:26,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1688 transitions. [2022-11-18 20:09:26,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 187.55555555555554) internal successors, (1688), 9 states have internal predecessors, (1688), 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) [2022-11-18 20:09:26,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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) [2022-11-18 20:09:26,061 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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) [2022-11-18 20:09:26,062 INFO L175 Difference]: Start difference. First operand has 475 places, 778 transitions, 7181 flow. Second operand 9 states and 1688 transitions. [2022-11-18 20:09:26,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 861 transitions, 9072 flow [2022-11-18 20:09:26,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 861 transitions, 8880 flow, removed 34 selfloop flow, removed 39 redundant places. [2022-11-18 20:09:26,937 INFO L231 Difference]: Finished difference. Result has 443 places, 793 transitions, 7898 flow [2022-11-18 20:09:26,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=6959, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7898, PETRI_PLACES=443, PETRI_TRANSITIONS=793} [2022-11-18 20:09:26,939 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 221 predicate places. [2022-11-18 20:09:26,939 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 793 transitions, 7898 flow [2022-11-18 20:09:26,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 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) [2022-11-18 20:09:26,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:09:26,940 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:26,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:27,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:09:27,147 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:09:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1771613072, now seen corresponding path program 1 times [2022-11-18 20:09:27,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:27,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170351421] [2022-11-18 20:09:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:27,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:09:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:27,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170351421] [2022-11-18 20:09:27,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170351421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:27,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:27,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:09:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399875081] [2022-11-18 20:09:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:27,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:09:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:09:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:09:27,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 245 [2022-11-18 20:09:27,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 793 transitions, 7898 flow. Second operand has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 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) [2022-11-18 20:09:27,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:09:27,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 245 [2022-11-18 20:09:27,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:09:36,436 INFO L130 PetriNetUnfolder]: 8337/25360 cut-off events. [2022-11-18 20:09:36,437 INFO L131 PetriNetUnfolder]: For 156079/158027 co-relation queries the response was YES. [2022-11-18 20:09:36,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81595 conditions, 25360 events. 8337/25360 cut-off events. For 156079/158027 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 310394 event pairs, 1814 based on Foata normal form. 1495/24211 useless extension candidates. Maximal degree in co-relation 81527. Up to 7087 conditions per place. [2022-11-18 20:09:36,807 INFO L137 encePairwiseOnDemand]: 240/245 looper letters, 505 selfloop transitions, 18 changer transitions 115/948 dead transitions. [2022-11-18 20:09:36,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 948 transitions, 11131 flow [2022-11-18 20:09:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:09:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:09:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 951 transitions. [2022-11-18 20:09:36,810 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7763265306122449 [2022-11-18 20:09:36,810 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 951 transitions. [2022-11-18 20:09:36,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 951 transitions. [2022-11-18 20:09:36,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:09:36,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 951 transitions. [2022-11-18 20:09:36,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.2) internal successors, (951), 5 states have internal predecessors, (951), 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) [2022-11-18 20:09:36,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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) [2022-11-18 20:09:36,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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) [2022-11-18 20:09:36,815 INFO L175 Difference]: Start difference. First operand has 443 places, 793 transitions, 7898 flow. Second operand 5 states and 951 transitions. [2022-11-18 20:09:36,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 948 transitions, 11131 flow [2022-11-18 20:09:38,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 948 transitions, 10880 flow, removed 24 selfloop flow, removed 5 redundant places. [2022-11-18 20:09:38,073 INFO L231 Difference]: Finished difference. Result has 443 places, 699 transitions, 7022 flow [2022-11-18 20:09:38,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=7710, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7022, PETRI_PLACES=443, PETRI_TRANSITIONS=699} [2022-11-18 20:09:38,074 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 221 predicate places. [2022-11-18 20:09:38,075 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 699 transitions, 7022 flow [2022-11-18 20:09:38,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 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) [2022-11-18 20:09:38,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:09:38,076 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:38,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:09:38,076 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:09:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:38,077 INFO L85 PathProgramCache]: Analyzing trace with hash 500144025, now seen corresponding path program 6 times [2022-11-18 20:09:38,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:38,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329322390] [2022-11-18 20:09:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:38,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:44,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:44,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329322390] [2022-11-18 20:09:44,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329322390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951933433] [2022-11-18 20:09:44,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:09:44,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:44,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:44,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdf11015-da01-4ec1-a65f-64df5bea9f42/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:09:45,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 20:09:45,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:09:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 20:09:45,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:45,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:09:45,275 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:09:45,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2022-11-18 20:09:45,358 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-18 20:09:45,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2022-11-18 20:09:46,100 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-18 20:09:46,100 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 25 [2022-11-18 20:09:48,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 20:09:48,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 20:09:49,214 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 38 treesize of output 36 [2022-11-18 20:09:49,709 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-18 20:09:49,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 15 [2022-11-18 20:09:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:49,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:53,635 INFO L321 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-18 20:09:53,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 534 treesize of output 523 [2022-11-18 20:09:53,677 INFO L321 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2022-11-18 20:09:53,678 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 481 treesize of output 433 [2022-11-18 20:09:53,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:09:53,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 270 [2022-11-18 20:09:53,731 INFO L321 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2022-11-18 20:09:53,732 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 183 [2022-11-18 20:09:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:58,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951933433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:58,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:58,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 86 [2022-11-18 20:09:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331943935] [2022-11-18 20:09:58,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:58,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-18 20:09:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:58,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-18 20:09:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=6782, Unknown=6, NotChecked=0, Total=7310 [2022-11-18 20:09:58,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 245 [2022-11-18 20:09:58,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 699 transitions, 7022 flow. Second operand has 86 states, 86 states have (on average 114.24418604651163) internal successors, (9825), 86 states have internal predecessors, (9825), 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) [2022-11-18 20:09:58,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:09:58,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 245 [2022-11-18 20:09:58,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand