./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-file-item-subst.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_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/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_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-file-item-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/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_0c1446c2-9908-4f63-b4a5-bda538591f46/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 be2a0d1eee532c8ad9f827ec91fa18dbacb100bdaebd8afe9a7f9b56098458ea --- 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 20:32:08,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:32:08,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:32:08,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:32:08,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:32:08,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:32:08,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:32:08,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:32:08,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:32:08,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:32:08,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:32:08,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:32:08,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:32:08,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:32:08,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:32:08,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:32:08,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:32:08,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:32:08,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:32:08,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:32:08,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:32:08,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:32:08,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:32:08,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:32:08,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:32:08,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:32:08,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:32:08,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:32:08,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:32:08,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:32:08,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:32:08,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:32:08,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:32:08,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:32:08,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:32:08,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:32:08,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:32:08,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:32:08,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:32:08,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:32:08,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:32:08,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:32:08,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:32:08,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:32:08,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:32:08,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:32:08,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:32:08,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:32:08,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:32:08,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:32:08,968 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:32:08,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:32:08,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:32:08,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:32:08,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:32:08,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:32:08,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:32:08,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:32:08,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:32:08,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:32:08,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:32:08,970 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:32:08,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:32:08,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:32:08,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:32:08,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:32:08,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:32:08,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:32:08,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:32:08,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:32:08,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:32:08,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:32:08,972 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:32:08,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:32:08,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:32:08,973 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_0c1446c2-9908-4f63-b4a5-bda538591f46/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be2a0d1eee532c8ad9f827ec91fa18dbacb100bdaebd8afe9a7f9b56098458ea [2022-11-18 20:32:09,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:32:09,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:32:09,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:32:09,262 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:32:09,263 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:32:09,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/chl-file-item-subst.wvr.c [2022-11-18 20:32:09,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/data/912d0aa68/bf5afddbb77544119db93bd09d2c2c69/FLAG6a0d1d5c3 [2022-11-18 20:32:09,830 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:32:09,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/sv-benchmarks/c/weaver/chl-file-item-subst.wvr.c [2022-11-18 20:32:09,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/data/912d0aa68/bf5afddbb77544119db93bd09d2c2c69/FLAG6a0d1d5c3 [2022-11-18 20:32:10,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/data/912d0aa68/bf5afddbb77544119db93bd09d2c2c69 [2022-11-18 20:32:10,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:32:10,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:32:10,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:32:10,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:32:10,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:32:10,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d723f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10, skipping insertion in model container [2022-11-18 20:32:10,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:32:10,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:32:10,426 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_0c1446c2-9908-4f63-b4a5-bda538591f46/sv-benchmarks/c/weaver/chl-file-item-subst.wvr.c[3015,3028] [2022-11-18 20:32:10,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:32:10,441 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:32:10,467 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_0c1446c2-9908-4f63-b4a5-bda538591f46/sv-benchmarks/c/weaver/chl-file-item-subst.wvr.c[3015,3028] [2022-11-18 20:32:10,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:32:10,491 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:32:10,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10 WrapperNode [2022-11-18 20:32:10,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:32:10,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:32:10,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:32:10,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:32:10,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,536 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 197 [2022-11-18 20:32:10,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:32:10,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:32:10,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:32:10,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:32:10,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,561 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:32:10,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:32:10,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:32:10,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:32:10,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (1/1) ... [2022-11-18 20:32:10,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:32:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:10,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:32:10,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c1446c2-9908-4f63-b4a5-bda538591f46/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:32:10,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:32:10,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:32:10,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:32:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:32:10,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:32:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 20:32:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 20:32:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:32:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:32:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:32:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:32:10,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:32:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:32:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:32:10,669 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 20:32:10,778 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:32:10,788 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:32:11,242 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:32:11,257 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:32:11,263 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-18 20:32:11,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:32:11 BoogieIcfgContainer [2022-11-18 20:32:11,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:32:11,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:32:11,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:32:11,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:32:11,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:32:10" (1/3) ... [2022-11-18 20:32:11,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2306f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:32:11, skipping insertion in model container [2022-11-18 20:32:11,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:32:10" (2/3) ... [2022-11-18 20:32:11,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2306f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:32:11, skipping insertion in model container [2022-11-18 20:32:11,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:32:11" (3/3) ... [2022-11-18 20:32:11,283 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-file-item-subst.wvr.c [2022-11-18 20:32:11,296 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:32:11,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:32:11,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:32:11,305 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:32:11,445 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:32:11,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 256 transitions, 536 flow [2022-11-18 20:32:11,632 INFO L130 PetriNetUnfolder]: 20/253 cut-off events. [2022-11-18 20:32:11,632 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:32:11,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 253 events. 20/253 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 561 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2022-11-18 20:32:11,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 256 transitions, 536 flow [2022-11-18 20:32:11,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 242 transitions, 502 flow [2022-11-18 20:32:11,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:32:11,676 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;@471720e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:32:11,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 20:32:11,748 INFO L130 PetriNetUnfolder]: 20/241 cut-off events. [2022-11-18 20:32:11,749 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:32:11,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:11,750 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] [2022-11-18 20:32:11,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash 290654998, now seen corresponding path program 1 times [2022-11-18 20:32:11,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:11,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051973167] [2022-11-18 20:32:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:13,948 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 20:32:13,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051973167] [2022-11-18 20:32:13,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051973167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:13,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:13,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:32:13,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067509990] [2022-11-18 20:32:13,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:13,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:32:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:32:14,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:32:14,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:14,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 242 transitions, 502 flow. Second operand has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:14,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:14,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:14,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:15,462 INFO L130 PetriNetUnfolder]: 233/1293 cut-off events. [2022-11-18 20:32:15,462 INFO L131 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2022-11-18 20:32:15,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 1293 events. 233/1293 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9624 event pairs, 100 based on Foata normal form. 116/1277 useless extension candidates. Maximal degree in co-relation 1469. Up to 207 conditions per place. [2022-11-18 20:32:15,484 INFO L137 encePairwiseOnDemand]: 237/256 looper letters, 61 selfloop transitions, 12 changer transitions 23/298 dead transitions. [2022-11-18 20:32:15,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 298 transitions, 860 flow [2022-11-18 20:32:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:32:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-18 20:32:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3573 transitions. [2022-11-18 20:32:15,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.872314453125 [2022-11-18 20:32:15,512 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3573 transitions. [2022-11-18 20:32:15,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3573 transitions. [2022-11-18 20:32:15,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:15,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3573 transitions. [2022-11-18 20:32:15,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 223.3125) internal successors, (3573), 16 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states 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 20:32:15,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 256.0) internal successors, (4352), 17 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states 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 20:32:15,559 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 256.0) internal successors, (4352), 17 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states 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 20:32:15,561 INFO L175 Difference]: Start difference. First operand has 232 places, 242 transitions, 502 flow. Second operand 16 states and 3573 transitions. [2022-11-18 20:32:15,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 298 transitions, 860 flow [2022-11-18 20:32:15,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 298 transitions, 812 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 20:32:15,579 INFO L231 Difference]: Finished difference. Result has 251 places, 243 transitions, 559 flow [2022-11-18 20:32:15,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=559, PETRI_PLACES=251, PETRI_TRANSITIONS=243} [2022-11-18 20:32:15,587 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 19 predicate places. [2022-11-18 20:32:15,588 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 243 transitions, 559 flow [2022-11-18 20:32:15,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:15,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:15,590 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] [2022-11-18 20:32:15,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:32:15,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:15,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash -305941234, now seen corresponding path program 2 times [2022-11-18 20:32:15,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:15,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872572726] [2022-11-18 20:32:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:15,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:16,477 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 20:32:16,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872572726] [2022-11-18 20:32:16,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872572726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:16,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:16,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:32:16,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857706749] [2022-11-18 20:32:16,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:16,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:32:16,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:32:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:32:16,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:16,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 243 transitions, 559 flow. Second operand has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:16,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:16,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:16,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:17,208 INFO L130 PetriNetUnfolder]: 252/1342 cut-off events. [2022-11-18 20:32:17,208 INFO L131 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-11-18 20:32:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1342 events. 252/1342 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10035 event pairs, 120 based on Foata normal form. 1/1214 useless extension candidates. Maximal degree in co-relation 2052. Up to 289 conditions per place. [2022-11-18 20:32:17,234 INFO L137 encePairwiseOnDemand]: 247/256 looper letters, 45 selfloop transitions, 19 changer transitions 12/278 dead transitions. [2022-11-18 20:32:17,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 278 transitions, 855 flow [2022-11-18 20:32:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:32:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-18 20:32:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2433 transitions. [2022-11-18 20:32:17,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8639914772727273 [2022-11-18 20:32:17,240 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2433 transitions. [2022-11-18 20:32:17,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2433 transitions. [2022-11-18 20:32:17,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:17,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2433 transitions. [2022-11-18 20:32:17,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 221.1818181818182) internal successors, (2433), 11 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states 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 20:32:17,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 20:32:17,256 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 20:32:17,257 INFO L175 Difference]: Start difference. First operand has 251 places, 243 transitions, 559 flow. Second operand 11 states and 2433 transitions. [2022-11-18 20:32:17,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 278 transitions, 855 flow [2022-11-18 20:32:17,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 278 transitions, 849 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:17,267 INFO L231 Difference]: Finished difference. Result has 260 places, 254 transitions, 704 flow [2022-11-18 20:32:17,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=704, PETRI_PLACES=260, PETRI_TRANSITIONS=254} [2022-11-18 20:32:17,268 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 28 predicate places. [2022-11-18 20:32:17,268 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 254 transitions, 704 flow [2022-11-18 20:32:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:17,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:17,270 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] [2022-11-18 20:32:17,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:32:17,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:17,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1569848786, now seen corresponding path program 3 times [2022-11-18 20:32:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:17,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716024163] [2022-11-18 20:32:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:18,175 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 20:32:18,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716024163] [2022-11-18 20:32:18,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716024163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:18,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:18,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:32:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150144813] [2022-11-18 20:32:18,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:32:18,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:32:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:32:18,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:18,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 254 transitions, 704 flow. Second operand has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:18,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:18,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:18,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:19,062 INFO L130 PetriNetUnfolder]: 324/1622 cut-off events. [2022-11-18 20:32:19,063 INFO L131 PetriNetUnfolder]: For 1187/1187 co-relation queries the response was YES. [2022-11-18 20:32:19,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2956 conditions, 1622 events. 324/1622 cut-off events. For 1187/1187 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13050 event pairs, 152 based on Foata normal form. 1/1476 useless extension candidates. Maximal degree in co-relation 2926. Up to 367 conditions per place. [2022-11-18 20:32:19,090 INFO L137 encePairwiseOnDemand]: 247/256 looper letters, 59 selfloop transitions, 20 changer transitions 13/294 dead transitions. [2022-11-18 20:32:19,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 294 transitions, 1105 flow [2022-11-18 20:32:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:32:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-18 20:32:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2435 transitions. [2022-11-18 20:32:19,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8647017045454546 [2022-11-18 20:32:19,097 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2435 transitions. [2022-11-18 20:32:19,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2435 transitions. [2022-11-18 20:32:19,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:19,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2435 transitions. [2022-11-18 20:32:19,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 221.36363636363637) internal successors, (2435), 11 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states 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 20:32:19,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 20:32:19,110 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 256.0) internal successors, (3072), 12 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 20:32:19,111 INFO L175 Difference]: Start difference. First operand has 260 places, 254 transitions, 704 flow. Second operand 11 states and 2435 transitions. [2022-11-18 20:32:19,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 294 transitions, 1105 flow [2022-11-18 20:32:19,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 294 transitions, 1067 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-11-18 20:32:19,130 INFO L231 Difference]: Finished difference. Result has 273 places, 266 transitions, 870 flow [2022-11-18 20:32:19,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=870, PETRI_PLACES=273, PETRI_TRANSITIONS=266} [2022-11-18 20:32:19,132 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 41 predicate places. [2022-11-18 20:32:19,132 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 266 transitions, 870 flow [2022-11-18 20:32:19,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:19,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:19,134 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] [2022-11-18 20:32:19,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:32:19,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:19,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1818609714, now seen corresponding path program 4 times [2022-11-18 20:32:19,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:19,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769568086] [2022-11-18 20:32:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:19,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:19,917 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 20:32:19,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:19,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769568086] [2022-11-18 20:32:19,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769568086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:19,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:19,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:32:19,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760105778] [2022-11-18 20:32:19,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:19,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:32:19,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:19,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:32:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:32:19,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:19,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 266 transitions, 870 flow. Second operand has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:19,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:19,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:19,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:21,198 INFO L130 PetriNetUnfolder]: 337/1935 cut-off events. [2022-11-18 20:32:21,199 INFO L131 PetriNetUnfolder]: For 2225/2225 co-relation queries the response was YES. [2022-11-18 20:32:21,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3678 conditions, 1935 events. 337/1935 cut-off events. For 2225/2225 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16987 event pairs, 161 based on Foata normal form. 1/1797 useless extension candidates. Maximal degree in co-relation 3632. Up to 304 conditions per place. [2022-11-18 20:32:21,226 INFO L137 encePairwiseOnDemand]: 247/256 looper letters, 80 selfloop transitions, 29 changer transitions 16/327 dead transitions. [2022-11-18 20:32:21,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 327 transitions, 1439 flow [2022-11-18 20:32:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:32:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 20:32:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2884 transitions. [2022-11-18 20:32:21,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8665865384615384 [2022-11-18 20:32:21,233 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2884 transitions. [2022-11-18 20:32:21,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2884 transitions. [2022-11-18 20:32:21,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:21,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2884 transitions. [2022-11-18 20:32:21,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 221.84615384615384) internal successors, (2884), 13 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 20:32:21,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 256.0) internal successors, (3584), 14 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 20:32:21,255 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 256.0) internal successors, (3584), 14 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 20:32:21,255 INFO L175 Difference]: Start difference. First operand has 273 places, 266 transitions, 870 flow. Second operand 13 states and 2884 transitions. [2022-11-18 20:32:21,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 327 transitions, 1439 flow [2022-11-18 20:32:21,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 327 transitions, 1337 flow, removed 51 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:21,276 INFO L231 Difference]: Finished difference. Result has 291 places, 276 transitions, 1027 flow [2022-11-18 20:32:21,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1027, PETRI_PLACES=291, PETRI_TRANSITIONS=276} [2022-11-18 20:32:21,278 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 59 predicate places. [2022-11-18 20:32:21,279 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 276 transitions, 1027 flow [2022-11-18 20:32:21,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:21,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:21,281 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] [2022-11-18 20:32:21,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:32:21,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash -629299502, now seen corresponding path program 5 times [2022-11-18 20:32:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:21,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007086595] [2022-11-18 20:32:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:21,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:22,255 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 20:32:22,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:22,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007086595] [2022-11-18 20:32:22,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007086595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:22,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:22,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:32:22,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528362340] [2022-11-18 20:32:22,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:22,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:32:22,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:32:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:32:22,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:22,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 276 transitions, 1027 flow. Second operand has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:22,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:22,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:22,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:23,106 INFO L130 PetriNetUnfolder]: 333/1830 cut-off events. [2022-11-18 20:32:23,106 INFO L131 PetriNetUnfolder]: For 2441/2441 co-relation queries the response was YES. [2022-11-18 20:32:23,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3697 conditions, 1830 events. 333/1830 cut-off events. For 2441/2441 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15923 event pairs, 183 based on Foata normal form. 1/1689 useless extension candidates. Maximal degree in co-relation 3642. Up to 440 conditions per place. [2022-11-18 20:32:23,135 INFO L137 encePairwiseOnDemand]: 247/256 looper letters, 59 selfloop transitions, 29 changer transitions 18/308 dead transitions. [2022-11-18 20:32:23,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 308 transitions, 1425 flow [2022-11-18 20:32:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:32:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:32:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2652 transitions. [2022-11-18 20:32:23,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.86328125 [2022-11-18 20:32:23,142 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2652 transitions. [2022-11-18 20:32:23,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2652 transitions. [2022-11-18 20:32:23,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:23,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2652 transitions. [2022-11-18 20:32:23,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 221.0) internal successors, (2652), 12 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 20:32:23,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states 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 20:32:23,158 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states 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 20:32:23,159 INFO L175 Difference]: Start difference. First operand has 291 places, 276 transitions, 1027 flow. Second operand 12 states and 2652 transitions. [2022-11-18 20:32:23,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 308 transitions, 1425 flow [2022-11-18 20:32:23,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 308 transitions, 1395 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-11-18 20:32:23,186 INFO L231 Difference]: Finished difference. Result has 303 places, 282 transitions, 1180 flow [2022-11-18 20:32:23,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1180, PETRI_PLACES=303, PETRI_TRANSITIONS=282} [2022-11-18 20:32:23,190 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 71 predicate places. [2022-11-18 20:32:23,190 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 282 transitions, 1180 flow [2022-11-18 20:32:23,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:23,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:23,208 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] [2022-11-18 20:32:23,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:32:23,208 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1288119502, now seen corresponding path program 6 times [2022-11-18 20:32:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:23,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451657031] [2022-11-18 20:32:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:23,938 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 20:32:23,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:23,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451657031] [2022-11-18 20:32:23,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451657031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:23,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:23,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:32:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11829962] [2022-11-18 20:32:23,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:32:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:32:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:32:23,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:23,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 282 transitions, 1180 flow. Second operand has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:23,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:23,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:23,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:24,699 INFO L130 PetriNetUnfolder]: 339/1884 cut-off events. [2022-11-18 20:32:24,700 INFO L131 PetriNetUnfolder]: For 2763/2763 co-relation queries the response was YES. [2022-11-18 20:32:24,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3857 conditions, 1884 events. 339/1884 cut-off events. For 2763/2763 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16517 event pairs, 182 based on Foata normal form. 1/1735 useless extension candidates. Maximal degree in co-relation 3803. Up to 427 conditions per place. [2022-11-18 20:32:24,731 INFO L137 encePairwiseOnDemand]: 247/256 looper letters, 61 selfloop transitions, 32 changer transitions 17/312 dead transitions. [2022-11-18 20:32:24,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 312 transitions, 1568 flow [2022-11-18 20:32:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:32:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:32:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2651 transitions. [2022-11-18 20:32:24,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8629557291666666 [2022-11-18 20:32:24,738 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2651 transitions. [2022-11-18 20:32:24,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2651 transitions. [2022-11-18 20:32:24,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:24,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2651 transitions. [2022-11-18 20:32:24,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 220.91666666666666) internal successors, (2651), 12 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states 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 20:32:24,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states 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 20:32:24,752 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states 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 20:32:24,752 INFO L175 Difference]: Start difference. First operand has 303 places, 282 transitions, 1180 flow. Second operand 12 states and 2651 transitions. [2022-11-18 20:32:24,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 312 transitions, 1568 flow [2022-11-18 20:32:24,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 312 transitions, 1508 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-11-18 20:32:24,786 INFO L231 Difference]: Finished difference. Result has 314 places, 288 transitions, 1312 flow [2022-11-18 20:32:24,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1312, PETRI_PLACES=314, PETRI_TRANSITIONS=288} [2022-11-18 20:32:24,787 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 82 predicate places. [2022-11-18 20:32:24,787 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 288 transitions, 1312 flow [2022-11-18 20:32:24,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.0) internal successors, (1744), 8 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states 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 20:32:24,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:24,788 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] [2022-11-18 20:32:24,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:32:24,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash -191510492, now seen corresponding path program 1 times [2022-11-18 20:32:24,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:24,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157315563] [2022-11-18 20:32:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:24,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:25,062 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 20:32:25,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:25,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157315563] [2022-11-18 20:32:25,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157315563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:25,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:25,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:32:25,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890332836] [2022-11-18 20:32:25,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:25,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:32:25,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:32:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:32:25,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 256 [2022-11-18 20:32:25,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 288 transitions, 1312 flow. Second operand has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 20:32:25,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:25,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 256 [2022-11-18 20:32:25,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:25,906 INFO L130 PetriNetUnfolder]: 242/3181 cut-off events. [2022-11-18 20:32:25,906 INFO L131 PetriNetUnfolder]: For 5513/5707 co-relation queries the response was YES. [2022-11-18 20:32:25,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6546 conditions, 3181 events. 242/3181 cut-off events. For 5513/5707 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 34083 event pairs, 34 based on Foata normal form. 4/2987 useless extension candidates. Maximal degree in co-relation 6468. Up to 139 conditions per place. [2022-11-18 20:32:25,957 INFO L137 encePairwiseOnDemand]: 245/256 looper letters, 57 selfloop transitions, 15 changer transitions 4/339 dead transitions. [2022-11-18 20:32:25,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 339 transitions, 1613 flow [2022-11-18 20:32:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:32:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:32:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2057 transitions. [2022-11-18 20:32:25,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8927951388888888 [2022-11-18 20:32:25,962 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2057 transitions. [2022-11-18 20:32:25,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2057 transitions. [2022-11-18 20:32:25,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:25,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2057 transitions. [2022-11-18 20:32:25,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.55555555555554) internal successors, (2057), 9 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states 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 20:32:25,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states 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 20:32:25,975 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states 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 20:32:25,975 INFO L175 Difference]: Start difference. First operand has 314 places, 288 transitions, 1312 flow. Second operand 9 states and 2057 transitions. [2022-11-18 20:32:25,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 339 transitions, 1613 flow [2022-11-18 20:32:26,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 339 transitions, 1543 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-11-18 20:32:26,021 INFO L231 Difference]: Finished difference. Result has 322 places, 304 transitions, 1361 flow [2022-11-18 20:32:26,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1361, PETRI_PLACES=322, PETRI_TRANSITIONS=304} [2022-11-18 20:32:26,022 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 90 predicate places. [2022-11-18 20:32:26,022 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 304 transitions, 1361 flow [2022-11-18 20:32:26,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 20:32:26,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:26,024 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] [2022-11-18 20:32:26,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:32:26,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:26,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash -209487590, now seen corresponding path program 1 times [2022-11-18 20:32:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:26,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711442702] [2022-11-18 20:32:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:26,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:26,084 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 20:32:26,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:26,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711442702] [2022-11-18 20:32:26,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711442702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:26,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:26,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:32:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624870828] [2022-11-18 20:32:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:32:26,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:32:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:32:26,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 256 [2022-11-18 20:32:26,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 304 transitions, 1361 flow. Second operand has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 20:32:26,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:26,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 256 [2022-11-18 20:32:26,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:27,102 INFO L130 PetriNetUnfolder]: 306/4086 cut-off events. [2022-11-18 20:32:27,102 INFO L131 PetriNetUnfolder]: For 6343/6533 co-relation queries the response was YES. [2022-11-18 20:32:27,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8534 conditions, 4086 events. 306/4086 cut-off events. For 6343/6533 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 47675 event pairs, 35 based on Foata normal form. 1/3879 useless extension candidates. Maximal degree in co-relation 8272. Up to 197 conditions per place. [2022-11-18 20:32:27,285 INFO L137 encePairwiseOnDemand]: 252/256 looper letters, 17 selfloop transitions, 2 changer transitions 0/311 dead transitions. [2022-11-18 20:32:27,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 311 transitions, 1418 flow [2022-11-18 20:32:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:32:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:32:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2022-11-18 20:32:27,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9453125 [2022-11-18 20:32:27,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2022-11-18 20:32:27,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2022-11-18 20:32:27,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:27,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2022-11-18 20:32:27,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states 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 20:32:27,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:32:27,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:32:27,293 INFO L175 Difference]: Start difference. First operand has 322 places, 304 transitions, 1361 flow. Second operand 3 states and 726 transitions. [2022-11-18 20:32:27,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 311 transitions, 1418 flow [2022-11-18 20:32:27,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 311 transitions, 1414 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:27,360 INFO L231 Difference]: Finished difference. Result has 322 places, 306 transitions, 1377 flow [2022-11-18 20:32:27,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1377, PETRI_PLACES=322, PETRI_TRANSITIONS=306} [2022-11-18 20:32:27,364 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 90 predicate places. [2022-11-18 20:32:27,364 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 306 transitions, 1377 flow [2022-11-18 20:32:27,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 20:32:27,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:27,365 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] [2022-11-18 20:32:27,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:32:27,365 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash -736310896, now seen corresponding path program 2 times [2022-11-18 20:32:27,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:27,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108874406] [2022-11-18 20:32:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:27,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:27,554 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 20:32:27,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108874406] [2022-11-18 20:32:27,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108874406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:27,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:27,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:32:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034789334] [2022-11-18 20:32:27,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:32:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:32:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:32:27,559 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 256 [2022-11-18 20:32:27,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 306 transitions, 1377 flow. Second operand has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 20:32:27,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:27,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 256 [2022-11-18 20:32:27,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:28,687 INFO L130 PetriNetUnfolder]: 312/3983 cut-off events. [2022-11-18 20:32:28,688 INFO L131 PetriNetUnfolder]: For 6502/6870 co-relation queries the response was YES. [2022-11-18 20:32:28,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8386 conditions, 3983 events. 312/3983 cut-off events. For 6502/6870 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 46635 event pairs, 61 based on Foata normal form. 18/3768 useless extension candidates. Maximal degree in co-relation 7976. Up to 298 conditions per place. [2022-11-18 20:32:28,760 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 54 selfloop transitions, 10 changer transitions 4/333 dead transitions. [2022-11-18 20:32:28,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 333 transitions, 1616 flow [2022-11-18 20:32:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:32:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:32:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1815 transitions. [2022-11-18 20:32:28,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.88623046875 [2022-11-18 20:32:28,766 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1815 transitions. [2022-11-18 20:32:28,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1815 transitions. [2022-11-18 20:32:28,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:28,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1815 transitions. [2022-11-18 20:32:28,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 226.875) internal successors, (1815), 8 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states 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 20:32:28,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states 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 20:32:28,777 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states 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 20:32:28,778 INFO L175 Difference]: Start difference. First operand has 322 places, 306 transitions, 1377 flow. Second operand 8 states and 1815 transitions. [2022-11-18 20:32:28,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 333 transitions, 1616 flow [2022-11-18 20:32:28,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 333 transitions, 1614 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:32:28,844 INFO L231 Difference]: Finished difference. Result has 335 places, 311 transitions, 1461 flow [2022-11-18 20:32:28,845 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1461, PETRI_PLACES=335, PETRI_TRANSITIONS=311} [2022-11-18 20:32:28,846 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 103 predicate places. [2022-11-18 20:32:28,846 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 311 transitions, 1461 flow [2022-11-18 20:32:28,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 20:32:28,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:28,847 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] [2022-11-18 20:32:28,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:32:28,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1025328832, now seen corresponding path program 2 times [2022-11-18 20:32:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:28,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251449028] [2022-11-18 20:32:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:28,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:28,907 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 20:32:28,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251449028] [2022-11-18 20:32:28,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251449028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:28,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:28,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:32:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185046108] [2022-11-18 20:32:28,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:28,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:32:28,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:32:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:32:28,918 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 256 [2022-11-18 20:32:28,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 311 transitions, 1461 flow. Second operand has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 20:32:28,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:28,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 256 [2022-11-18 20:32:28,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:29,635 INFO L130 PetriNetUnfolder]: 203/2904 cut-off events. [2022-11-18 20:32:29,636 INFO L131 PetriNetUnfolder]: For 3956/4027 co-relation queries the response was YES. [2022-11-18 20:32:29,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6047 conditions, 2904 events. 203/2904 cut-off events. For 3956/4027 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 30401 event pairs, 31 based on Foata normal form. 0/2756 useless extension candidates. Maximal degree in co-relation 5851. Up to 137 conditions per place. [2022-11-18 20:32:29,673 INFO L137 encePairwiseOnDemand]: 250/256 looper letters, 17 selfloop transitions, 4 changer transitions 3/318 dead transitions. [2022-11-18 20:32:29,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 318 transitions, 1526 flow [2022-11-18 20:32:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:32:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:32:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2022-11-18 20:32:29,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9453125 [2022-11-18 20:32:29,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2022-11-18 20:32:29,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2022-11-18 20:32:29,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:29,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2022-11-18 20:32:29,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states 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 20:32:29,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:32:29,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:32:29,680 INFO L175 Difference]: Start difference. First operand has 335 places, 311 transitions, 1461 flow. Second operand 3 states and 726 transitions. [2022-11-18 20:32:29,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 318 transitions, 1526 flow [2022-11-18 20:32:29,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 318 transitions, 1522 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:29,726 INFO L231 Difference]: Finished difference. Result has 335 places, 310 transitions, 1475 flow [2022-11-18 20:32:29,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1475, PETRI_PLACES=335, PETRI_TRANSITIONS=310} [2022-11-18 20:32:29,729 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 103 predicate places. [2022-11-18 20:32:29,729 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 310 transitions, 1475 flow [2022-11-18 20:32:29,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 20:32:29,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:29,730 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] [2022-11-18 20:32:29,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:32:29,731 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 1 more)] === [2022-11-18 20:32:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1578766824, now seen corresponding path program 3 times [2022-11-18 20:32:29,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:29,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307073994] [2022-11-18 20:32:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:29,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:29,907 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 20:32:29,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:29,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307073994] [2022-11-18 20:32:29,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307073994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:29,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:29,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:32:29,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920740082] [2022-11-18 20:32:29,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:29,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:32:29,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:32:29,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:32:29,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 256 [2022-11-18 20:32:29,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 310 transitions, 1475 flow. Second operand has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 20:32:29,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:29,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 256 [2022-11-18 20:32:29,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:30,710 INFO L130 PetriNetUnfolder]: 183/2509 cut-off events. [2022-11-18 20:32:30,710 INFO L131 PetriNetUnfolder]: For 3504/3684 co-relation queries the response was YES. [2022-11-18 20:32:30,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5119 conditions, 2509 events. 183/2509 cut-off events. For 3504/3684 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 25394 event pairs, 35 based on Foata normal form. 10/2379 useless extension candidates. Maximal degree in co-relation 4865. Up to 180 conditions per place. [2022-11-18 20:32:30,753 INFO L137 encePairwiseOnDemand]: 245/256 looper letters, 44 selfloop transitions, 10 changer transitions 11/332 dead transitions. [2022-11-18 20:32:30,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 332 transitions, 1696 flow [2022-11-18 20:32:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:32:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:32:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1815 transitions. [2022-11-18 20:32:30,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.88623046875 [2022-11-18 20:32:30,831 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1815 transitions. [2022-11-18 20:32:30,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1815 transitions. [2022-11-18 20:32:30,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:30,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1815 transitions. [2022-11-18 20:32:30,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 226.875) internal successors, (1815), 8 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states 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 20:32:30,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states 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 20:32:30,844 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states 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 20:32:30,844 INFO L175 Difference]: Start difference. First operand has 335 places, 310 transitions, 1475 flow. Second operand 8 states and 1815 transitions. [2022-11-18 20:32:30,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 332 transitions, 1696 flow [2022-11-18 20:32:30,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 332 transitions, 1684 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:30,893 INFO L231 Difference]: Finished difference. Result has 344 places, 308 transitions, 1486 flow [2022-11-18 20:32:30,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1486, PETRI_PLACES=344, PETRI_TRANSITIONS=308} [2022-11-18 20:32:30,895 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 112 predicate places. [2022-11-18 20:32:30,895 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 308 transitions, 1486 flow [2022-11-18 20:32:30,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 20:32:30,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:30,896 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] [2022-11-18 20:32:30,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:32:30,896 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 1 more)] === [2022-11-18 20:32:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:30,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1453635942, now seen corresponding path program 1 times [2022-11-18 20:32:30,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:30,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145860909] [2022-11-18 20:32:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:30,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:31,025 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 20:32:31,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:31,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145860909] [2022-11-18 20:32:31,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145860909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:31,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:31,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:32:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006515168] [2022-11-18 20:32:31,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:31,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:32:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:32:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:32:31,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 256 [2022-11-18 20:32:31,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 308 transitions, 1486 flow. Second operand has 7 states, 7 states have (on average 225.85714285714286) internal successors, (1581), 7 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states 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 20:32:31,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:31,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 256 [2022-11-18 20:32:31,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:31,425 INFO L130 PetriNetUnfolder]: 84/1115 cut-off events. [2022-11-18 20:32:31,426 INFO L131 PetriNetUnfolder]: For 1585/1701 co-relation queries the response was YES. [2022-11-18 20:32:31,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 1115 events. 84/1115 cut-off events. For 1585/1701 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9235 event pairs, 14 based on Foata normal form. 8/1062 useless extension candidates. Maximal degree in co-relation 2208. Up to 66 conditions per place. [2022-11-18 20:32:31,449 INFO L137 encePairwiseOnDemand]: 248/256 looper letters, 37 selfloop transitions, 9 changer transitions 4/328 dead transitions. [2022-11-18 20:32:31,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 328 transitions, 1658 flow [2022-11-18 20:32:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:32:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:32:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2050 transitions. [2022-11-18 20:32:31,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8897569444444444 [2022-11-18 20:32:31,453 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2050 transitions. [2022-11-18 20:32:31,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2050 transitions. [2022-11-18 20:32:31,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:31,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2050 transitions. [2022-11-18 20:32:31,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.77777777777777) internal successors, (2050), 9 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states 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 20:32:31,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states 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 20:32:31,463 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states 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 20:32:31,463 INFO L175 Difference]: Start difference. First operand has 344 places, 308 transitions, 1486 flow. Second operand 9 states and 2050 transitions. [2022-11-18 20:32:31,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 328 transitions, 1658 flow [2022-11-18 20:32:31,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 328 transitions, 1589 flow, removed 13 selfloop flow, removed 15 redundant places. [2022-11-18 20:32:31,485 INFO L231 Difference]: Finished difference. Result has 340 places, 312 transitions, 1491 flow [2022-11-18 20:32:31,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1491, PETRI_PLACES=340, PETRI_TRANSITIONS=312} [2022-11-18 20:32:31,487 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 108 predicate places. [2022-11-18 20:32:31,487 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 312 transitions, 1491 flow [2022-11-18 20:32:31,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 225.85714285714286) internal successors, (1581), 7 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states 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 20:32:31,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:31,488 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] [2022-11-18 20:32:31,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:32:31,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash -467109772, now seen corresponding path program 1 times [2022-11-18 20:32:31,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:31,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473987677] [2022-11-18 20:32:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:31,529 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 20:32:31,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:31,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473987677] [2022-11-18 20:32:31,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473987677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:31,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:31,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:32:31,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102656274] [2022-11-18 20:32:31,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:31,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:32:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:32:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:32:31,533 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 256 [2022-11-18 20:32:31,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 312 transitions, 1491 flow. Second operand has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 20:32:31,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:31,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 256 [2022-11-18 20:32:31,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:31,760 INFO L130 PetriNetUnfolder]: 72/1098 cut-off events. [2022-11-18 20:32:31,761 INFO L131 PetriNetUnfolder]: For 1592/1700 co-relation queries the response was YES. [2022-11-18 20:32:31,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 1098 events. 72/1098 cut-off events. For 1592/1700 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8695 event pairs, 10 based on Foata normal form. 6/1035 useless extension candidates. Maximal degree in co-relation 2140. Up to 43 conditions per place. [2022-11-18 20:32:31,775 INFO L137 encePairwiseOnDemand]: 252/256 looper letters, 14 selfloop transitions, 2 changer transitions 15/311 dead transitions. [2022-11-18 20:32:31,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 311 transitions, 1504 flow [2022-11-18 20:32:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:32:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:32:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-11-18 20:32:31,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9427083333333334 [2022-11-18 20:32:31,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-11-18 20:32:31,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-11-18 20:32:31,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:31,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-11-18 20:32:31,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 20:32:31,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:32:31,782 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:32:31,782 INFO L175 Difference]: Start difference. First operand has 340 places, 312 transitions, 1491 flow. Second operand 3 states and 724 transitions. [2022-11-18 20:32:31,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 311 transitions, 1504 flow [2022-11-18 20:32:31,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 311 transitions, 1490 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-18 20:32:31,804 INFO L231 Difference]: Finished difference. Result has 333 places, 296 transitions, 1362 flow [2022-11-18 20:32:31,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1362, PETRI_PLACES=333, PETRI_TRANSITIONS=296} [2022-11-18 20:32:31,805 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 101 predicate places. [2022-11-18 20:32:31,806 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 296 transitions, 1362 flow [2022-11-18 20:32:31,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 20:32:31,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:31,806 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:31,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:32:31,807 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1453565342, now seen corresponding path program 1 times [2022-11-18 20:32:31,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:31,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852918249] [2022-11-18 20:32:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:31,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:32,139 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 20:32:32,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:32,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852918249] [2022-11-18 20:32:32,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852918249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:32,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:32,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:32,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688410947] [2022-11-18 20:32:32,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:32,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:32,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:32,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:32,144 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:32,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 296 transitions, 1362 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:32,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:32,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:32,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:33,182 INFO L130 PetriNetUnfolder]: 676/2486 cut-off events. [2022-11-18 20:32:33,182 INFO L131 PetriNetUnfolder]: For 4505/4524 co-relation queries the response was YES. [2022-11-18 20:32:33,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6096 conditions, 2486 events. 676/2486 cut-off events. For 4505/4524 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23388 event pairs, 324 based on Foata normal form. 2/2366 useless extension candidates. Maximal degree in co-relation 5986. Up to 857 conditions per place. [2022-11-18 20:32:33,232 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 147 selfloop transitions, 30 changer transitions 28/415 dead transitions. [2022-11-18 20:32:33,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 415 transitions, 2355 flow [2022-11-18 20:32:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:32:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 20:32:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5300 transitions. [2022-11-18 20:32:33,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8626302083333334 [2022-11-18 20:32:33,245 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5300 transitions. [2022-11-18 20:32:33,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5300 transitions. [2022-11-18 20:32:33,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:33,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5300 transitions. [2022-11-18 20:32:33,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 220.83333333333334) internal successors, (5300), 24 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states 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 20:32:33,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 256.0) internal successors, (6400), 25 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states 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 20:32:33,276 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 256.0) internal successors, (6400), 25 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states 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 20:32:33,276 INFO L175 Difference]: Start difference. First operand has 333 places, 296 transitions, 1362 flow. Second operand 24 states and 5300 transitions. [2022-11-18 20:32:33,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 415 transitions, 2355 flow [2022-11-18 20:32:33,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 415 transitions, 2328 flow, removed 9 selfloop flow, removed 7 redundant places. [2022-11-18 20:32:33,320 INFO L231 Difference]: Finished difference. Result has 364 places, 325 transitions, 1599 flow [2022-11-18 20:32:33,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1599, PETRI_PLACES=364, PETRI_TRANSITIONS=325} [2022-11-18 20:32:33,322 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 132 predicate places. [2022-11-18 20:32:33,322 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 325 transitions, 1599 flow [2022-11-18 20:32:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:33,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:33,324 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] [2022-11-18 20:32:33,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:32:33,324 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash -797744812, now seen corresponding path program 2 times [2022-11-18 20:32:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630317924] [2022-11-18 20:32:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:33,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:33,713 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 20:32:33,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:33,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630317924] [2022-11-18 20:32:33,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630317924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:33,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:33,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:33,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126037307] [2022-11-18 20:32:33,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:33,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:33,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:33,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:33,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:33,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:33,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 325 transitions, 1599 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:33,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:33,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:33,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:34,869 INFO L130 PetriNetUnfolder]: 1017/3706 cut-off events. [2022-11-18 20:32:34,869 INFO L131 PetriNetUnfolder]: For 11547/11564 co-relation queries the response was YES. [2022-11-18 20:32:34,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11717 conditions, 3706 events. 1017/3706 cut-off events. For 11547/11564 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37877 event pairs, 509 based on Foata normal form. 2/3554 useless extension candidates. Maximal degree in co-relation 11634. Up to 1184 conditions per place. [2022-11-18 20:32:34,937 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 180 selfloop transitions, 45 changer transitions 26/461 dead transitions. [2022-11-18 20:32:34,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 461 transitions, 2961 flow [2022-11-18 20:32:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:32:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 20:32:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5297 transitions. [2022-11-18 20:32:34,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8621419270833334 [2022-11-18 20:32:34,948 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5297 transitions. [2022-11-18 20:32:34,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5297 transitions. [2022-11-18 20:32:34,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:34,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5297 transitions. [2022-11-18 20:32:34,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 220.70833333333334) internal successors, (5297), 24 states have internal predecessors, (5297), 0 states have call successors, (0), 0 states 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 20:32:34,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 256.0) internal successors, (6400), 25 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states 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 20:32:34,976 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 256.0) internal successors, (6400), 25 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states 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 20:32:34,976 INFO L175 Difference]: Start difference. First operand has 364 places, 325 transitions, 1599 flow. Second operand 24 states and 5297 transitions. [2022-11-18 20:32:34,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 461 transitions, 2961 flow [2022-11-18 20:32:35,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 461 transitions, 2875 flow, removed 43 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:35,095 INFO L231 Difference]: Finished difference. Result has 403 places, 354 transitions, 1995 flow [2022-11-18 20:32:35,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1995, PETRI_PLACES=403, PETRI_TRANSITIONS=354} [2022-11-18 20:32:35,097 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 171 predicate places. [2022-11-18 20:32:35,097 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 354 transitions, 1995 flow [2022-11-18 20:32:35,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:35,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:35,098 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] [2022-11-18 20:32:35,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:32:35,099 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:35,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:35,099 INFO L85 PathProgramCache]: Analyzing trace with hash 307121390, now seen corresponding path program 3 times [2022-11-18 20:32:35,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:35,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193379968] [2022-11-18 20:32:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:35,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:35,449 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 20:32:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:35,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193379968] [2022-11-18 20:32:35,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193379968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:35,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:35,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:35,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21987174] [2022-11-18 20:32:35,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:35,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:35,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:35,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:35,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:35,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:35,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 354 transitions, 1995 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:35,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:35,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:35,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:37,197 INFO L130 PetriNetUnfolder]: 1120/3966 cut-off events. [2022-11-18 20:32:37,197 INFO L131 PetriNetUnfolder]: For 19463/19480 co-relation queries the response was YES. [2022-11-18 20:32:37,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14987 conditions, 3966 events. 1120/3966 cut-off events. For 19463/19480 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41351 event pairs, 628 based on Foata normal form. 2/3804 useless extension candidates. Maximal degree in co-relation 14885. Up to 1490 conditions per place. [2022-11-18 20:32:37,268 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 159 selfloop transitions, 56 changer transitions 24/449 dead transitions. [2022-11-18 20:32:37,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 449 transitions, 3413 flow [2022-11-18 20:32:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:32:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 20:32:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4849 transitions. [2022-11-18 20:32:37,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8609730113636364 [2022-11-18 20:32:37,279 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4849 transitions. [2022-11-18 20:32:37,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4849 transitions. [2022-11-18 20:32:37,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:37,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4849 transitions. [2022-11-18 20:32:37,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 220.4090909090909) internal successors, (4849), 22 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states 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 20:32:37,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 256.0) internal successors, (5888), 23 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states 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 20:32:37,304 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 256.0) internal successors, (5888), 23 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states 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 20:32:37,304 INFO L175 Difference]: Start difference. First operand has 403 places, 354 transitions, 1995 flow. Second operand 22 states and 4849 transitions. [2022-11-18 20:32:37,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 449 transitions, 3413 flow [2022-11-18 20:32:37,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 449 transitions, 3195 flow, removed 109 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:37,536 INFO L231 Difference]: Finished difference. Result has 434 places, 384 transitions, 2454 flow [2022-11-18 20:32:37,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2454, PETRI_PLACES=434, PETRI_TRANSITIONS=384} [2022-11-18 20:32:37,537 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 202 predicate places. [2022-11-18 20:32:37,537 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 384 transitions, 2454 flow [2022-11-18 20:32:37,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:37,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:37,539 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] [2022-11-18 20:32:37,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:32:37,540 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:37,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2044914430, now seen corresponding path program 4 times [2022-11-18 20:32:37,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:37,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662988260] [2022-11-18 20:32:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:37,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:37,905 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 20:32:37,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:37,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662988260] [2022-11-18 20:32:37,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662988260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:37,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:37,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:37,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146744949] [2022-11-18 20:32:37,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:37,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:37,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:37,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:37,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:37,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:37,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 384 transitions, 2454 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:37,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:37,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:37,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:39,531 INFO L130 PetriNetUnfolder]: 1243/4525 cut-off events. [2022-11-18 20:32:39,532 INFO L131 PetriNetUnfolder]: For 27289/27306 co-relation queries the response was YES. [2022-11-18 20:32:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17554 conditions, 4525 events. 1243/4525 cut-off events. For 27289/27306 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 48494 event pairs, 650 based on Foata normal form. 2/4363 useless extension candidates. Maximal degree in co-relation 17439. Up to 1479 conditions per place. [2022-11-18 20:32:39,646 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 175 selfloop transitions, 61 changer transitions 22/468 dead transitions. [2022-11-18 20:32:39,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 468 transitions, 3897 flow [2022-11-18 20:32:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:32:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 20:32:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4413 transitions. [2022-11-18 20:32:39,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8619140625 [2022-11-18 20:32:39,656 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4413 transitions. [2022-11-18 20:32:39,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4413 transitions. [2022-11-18 20:32:39,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:39,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4413 transitions. [2022-11-18 20:32:39,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 220.65) internal successors, (4413), 20 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states 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 20:32:39,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 256.0) internal successors, (5376), 21 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 20:32:39,679 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 256.0) internal successors, (5376), 21 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 20:32:39,679 INFO L175 Difference]: Start difference. First operand has 434 places, 384 transitions, 2454 flow. Second operand 20 states and 4413 transitions. [2022-11-18 20:32:39,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 468 transitions, 3897 flow [2022-11-18 20:32:39,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 468 transitions, 3663 flow, removed 117 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:39,951 INFO L231 Difference]: Finished difference. Result has 464 places, 416 transitions, 2972 flow [2022-11-18 20:32:39,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2972, PETRI_PLACES=464, PETRI_TRANSITIONS=416} [2022-11-18 20:32:39,952 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 232 predicate places. [2022-11-18 20:32:39,952 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 416 transitions, 2972 flow [2022-11-18 20:32:39,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:39,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:39,953 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] [2022-11-18 20:32:39,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 20:32:39,953 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:39,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2103424878, now seen corresponding path program 5 times [2022-11-18 20:32:39,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:39,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028101458] [2022-11-18 20:32:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:39,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:40,455 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 20:32:40,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:40,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028101458] [2022-11-18 20:32:40,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028101458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:40,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:40,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:40,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160902259] [2022-11-18 20:32:40,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:40,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:40,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:40,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:40,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 416 transitions, 2972 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:40,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:40,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:40,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:42,007 INFO L130 PetriNetUnfolder]: 1281/4685 cut-off events. [2022-11-18 20:32:42,008 INFO L131 PetriNetUnfolder]: For 36791/36808 co-relation queries the response was YES. [2022-11-18 20:32:42,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19589 conditions, 4685 events. 1281/4685 cut-off events. For 36791/36808 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 51254 event pairs, 656 based on Foata normal form. 2/4516 useless extension candidates. Maximal degree in co-relation 19460. Up to 1665 conditions per place. [2022-11-18 20:32:42,096 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 194 selfloop transitions, 78 changer transitions 19/501 dead transitions. [2022-11-18 20:32:42,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 501 transitions, 4567 flow [2022-11-18 20:32:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:32:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 20:32:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4409 transitions. [2022-11-18 20:32:42,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8611328125 [2022-11-18 20:32:42,102 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4409 transitions. [2022-11-18 20:32:42,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4409 transitions. [2022-11-18 20:32:42,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:42,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4409 transitions. [2022-11-18 20:32:42,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 220.45) internal successors, (4409), 20 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states 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 20:32:42,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 256.0) internal successors, (5376), 21 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 20:32:42,119 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 256.0) internal successors, (5376), 21 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 20:32:42,119 INFO L175 Difference]: Start difference. First operand has 464 places, 416 transitions, 2972 flow. Second operand 20 states and 4409 transitions. [2022-11-18 20:32:42,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 501 transitions, 4567 flow [2022-11-18 20:32:42,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 501 transitions, 4199 flow, removed 184 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:42,474 INFO L231 Difference]: Finished difference. Result has 494 places, 447 transitions, 3511 flow [2022-11-18 20:32:42,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3511, PETRI_PLACES=494, PETRI_TRANSITIONS=447} [2022-11-18 20:32:42,475 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 262 predicate places. [2022-11-18 20:32:42,476 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 447 transitions, 3511 flow [2022-11-18 20:32:42,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:42,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:42,476 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] [2022-11-18 20:32:42,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 20:32:42,477 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash 876170242, now seen corresponding path program 6 times [2022-11-18 20:32:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044745188] [2022-11-18 20:32:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:42,831 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 20:32:42,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:42,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044745188] [2022-11-18 20:32:42,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044745188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:42,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:42,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:42,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622780817] [2022-11-18 20:32:42,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:42,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:42,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:42,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:42,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:42,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:42,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 447 transitions, 3511 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:42,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:42,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:42,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:44,326 INFO L130 PetriNetUnfolder]: 1311/4936 cut-off events. [2022-11-18 20:32:44,326 INFO L131 PetriNetUnfolder]: For 42336/42399 co-relation queries the response was YES. [2022-11-18 20:32:44,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20739 conditions, 4936 events. 1311/4936 cut-off events. For 42336/42399 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 54883 event pairs, 688 based on Foata normal form. 10/4764 useless extension candidates. Maximal degree in co-relation 20596. Up to 1681 conditions per place. [2022-11-18 20:32:44,429 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 198 selfloop transitions, 96 changer transitions 17/521 dead transitions. [2022-11-18 20:32:44,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 521 transitions, 5090 flow [2022-11-18 20:32:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:32:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:32:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3973 transitions. [2022-11-18 20:32:44,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8621961805555556 [2022-11-18 20:32:44,445 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3973 transitions. [2022-11-18 20:32:44,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3973 transitions. [2022-11-18 20:32:44,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:44,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3973 transitions. [2022-11-18 20:32:44,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 220.72222222222223) internal successors, (3973), 18 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states 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 20:32:44,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:32:44,464 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:32:44,464 INFO L175 Difference]: Start difference. First operand has 494 places, 447 transitions, 3511 flow. Second operand 18 states and 3973 transitions. [2022-11-18 20:32:44,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 521 transitions, 5090 flow [2022-11-18 20:32:44,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 521 transitions, 4662 flow, removed 214 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:44,822 INFO L231 Difference]: Finished difference. Result has 515 places, 468 transitions, 3880 flow [2022-11-18 20:32:44,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3880, PETRI_PLACES=515, PETRI_TRANSITIONS=468} [2022-11-18 20:32:44,823 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 283 predicate places. [2022-11-18 20:32:44,823 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 468 transitions, 3880 flow [2022-11-18 20:32:44,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:44,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:44,825 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] [2022-11-18 20:32:44,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 20:32:44,825 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash -518875914, now seen corresponding path program 7 times [2022-11-18 20:32:44,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:44,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682739772] [2022-11-18 20:32:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:44,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:45,144 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 20:32:45,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682739772] [2022-11-18 20:32:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682739772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:45,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:45,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275203304] [2022-11-18 20:32:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:45,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:45,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:45,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:45,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:45,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 468 transitions, 3880 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:45,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:45,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:45,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:46,757 INFO L130 PetriNetUnfolder]: 1361/5034 cut-off events. [2022-11-18 20:32:46,757 INFO L131 PetriNetUnfolder]: For 32237/32254 co-relation queries the response was YES. [2022-11-18 20:32:46,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21147 conditions, 5034 events. 1361/5034 cut-off events. For 32237/32254 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 55936 event pairs, 669 based on Foata normal form. 2/4860 useless extension candidates. Maximal degree in co-relation 20997. Up to 1730 conditions per place. [2022-11-18 20:32:46,860 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 206 selfloop transitions, 100 changer transitions 16/532 dead transitions. [2022-11-18 20:32:46,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 532 transitions, 5253 flow [2022-11-18 20:32:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:32:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 20:32:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3756 transitions. [2022-11-18 20:32:46,870 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8630514705882353 [2022-11-18 20:32:46,870 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3756 transitions. [2022-11-18 20:32:46,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3756 transitions. [2022-11-18 20:32:46,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:46,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3756 transitions. [2022-11-18 20:32:46,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 220.94117647058823) internal successors, (3756), 17 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states 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 20:32:46,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states 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 20:32:46,890 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states 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 20:32:46,891 INFO L175 Difference]: Start difference. First operand has 515 places, 468 transitions, 3880 flow. Second operand 17 states and 3756 transitions. [2022-11-18 20:32:46,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 532 transitions, 5253 flow [2022-11-18 20:32:47,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 532 transitions, 5105 flow, removed 74 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:47,212 INFO L231 Difference]: Finished difference. Result has 536 places, 489 transitions, 4399 flow [2022-11-18 20:32:47,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4399, PETRI_PLACES=536, PETRI_TRANSITIONS=489} [2022-11-18 20:32:47,213 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 304 predicate places. [2022-11-18 20:32:47,213 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 489 transitions, 4399 flow [2022-11-18 20:32:47,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:47,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:47,214 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] [2022-11-18 20:32:47,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 20:32:47,214 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2087596584, now seen corresponding path program 8 times [2022-11-18 20:32:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:47,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792854975] [2022-11-18 20:32:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:47,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:47,545 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 20:32:47,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792854975] [2022-11-18 20:32:47,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792854975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:47,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:47,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:47,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230215175] [2022-11-18 20:32:47,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:47,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:47,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:47,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:47,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:47,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 489 transitions, 4399 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:47,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:47,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:47,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:49,298 INFO L130 PetriNetUnfolder]: 1368/5322 cut-off events. [2022-11-18 20:32:49,298 INFO L131 PetriNetUnfolder]: For 37793/37844 co-relation queries the response was YES. [2022-11-18 20:32:49,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22260 conditions, 5322 events. 1368/5322 cut-off events. For 37793/37844 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 60735 event pairs, 687 based on Foata normal form. 10/5155 useless extension candidates. Maximal degree in co-relation 22102. Up to 1764 conditions per place. [2022-11-18 20:32:49,474 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 209 selfloop transitions, 107 changer transitions 19/545 dead transitions. [2022-11-18 20:32:49,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 545 transitions, 5617 flow [2022-11-18 20:32:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:32:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-18 20:32:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3536 transitions. [2022-11-18 20:32:49,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.86328125 [2022-11-18 20:32:49,479 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3536 transitions. [2022-11-18 20:32:49,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3536 transitions. [2022-11-18 20:32:49,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:49,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3536 transitions. [2022-11-18 20:32:49,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 221.0) internal successors, (3536), 16 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states 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 20:32:49,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 256.0) internal successors, (4352), 17 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states 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 20:32:49,491 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 256.0) internal successors, (4352), 17 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states 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 20:32:49,491 INFO L175 Difference]: Start difference. First operand has 536 places, 489 transitions, 4399 flow. Second operand 16 states and 3536 transitions. [2022-11-18 20:32:49,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 545 transitions, 5617 flow [2022-11-18 20:32:49,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 545 transitions, 5491 flow, removed 63 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:49,888 INFO L231 Difference]: Finished difference. Result has 554 places, 497 transitions, 4681 flow [2022-11-18 20:32:49,888 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=4277, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4681, PETRI_PLACES=554, PETRI_TRANSITIONS=497} [2022-11-18 20:32:49,889 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 322 predicate places. [2022-11-18 20:32:49,889 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 497 transitions, 4681 flow [2022-11-18 20:32:49,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:49,889 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:49,889 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] [2022-11-18 20:32:49,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 20:32:49,890 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:49,890 INFO L85 PathProgramCache]: Analyzing trace with hash -720029630, now seen corresponding path program 9 times [2022-11-18 20:32:49,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:49,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755936760] [2022-11-18 20:32:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:49,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:50,211 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 20:32:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:50,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755936760] [2022-11-18 20:32:50,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755936760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:50,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:50,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714554714] [2022-11-18 20:32:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:50,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:50,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:50,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 497 transitions, 4681 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:50,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:50,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:50,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:52,237 INFO L130 PetriNetUnfolder]: 1403/5541 cut-off events. [2022-11-18 20:32:52,237 INFO L131 PetriNetUnfolder]: For 41981/42032 co-relation queries the response was YES. [2022-11-18 20:32:52,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23750 conditions, 5541 events. 1403/5541 cut-off events. For 41981/42032 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 63621 event pairs, 753 based on Foata normal form. 2/5355 useless extension candidates. Maximal degree in co-relation 23586. Up to 1702 conditions per place. [2022-11-18 20:32:52,488 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 240 selfloop transitions, 98 changer transitions 23/571 dead transitions. [2022-11-18 20:32:52,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 571 transitions, 6321 flow [2022-11-18 20:32:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:32:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:32:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4632 transitions. [2022-11-18 20:32:52,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8616071428571429 [2022-11-18 20:32:52,494 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4632 transitions. [2022-11-18 20:32:52,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4632 transitions. [2022-11-18 20:32:52,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:52,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4632 transitions. [2022-11-18 20:32:52,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 220.57142857142858) internal successors, (4632), 21 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states 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 20:32:52,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states 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 20:32:52,511 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states 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 20:32:52,511 INFO L175 Difference]: Start difference. First operand has 554 places, 497 transitions, 4681 flow. Second operand 21 states and 4632 transitions. [2022-11-18 20:32:52,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 571 transitions, 6321 flow [2022-11-18 20:32:52,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 571 transitions, 6208 flow, removed 34 selfloop flow, removed 3 redundant places. [2022-11-18 20:32:52,876 INFO L231 Difference]: Finished difference. Result has 583 places, 521 transitions, 5402 flow [2022-11-18 20:32:52,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5402, PETRI_PLACES=583, PETRI_TRANSITIONS=521} [2022-11-18 20:32:52,877 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 351 predicate places. [2022-11-18 20:32:52,877 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 521 transitions, 5402 flow [2022-11-18 20:32:52,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:52,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:52,877 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] [2022-11-18 20:32:52,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 20:32:52,878 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:52,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:52,878 INFO L85 PathProgramCache]: Analyzing trace with hash 132138936, now seen corresponding path program 10 times [2022-11-18 20:32:52,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:52,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082454443] [2022-11-18 20:32:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:53,204 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 20:32:53,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082454443] [2022-11-18 20:32:53,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082454443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:53,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:53,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:53,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526068057] [2022-11-18 20:32:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:53,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:53,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:53,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:53,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 521 transitions, 5402 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:53,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:53,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:53,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:55,140 INFO L130 PetriNetUnfolder]: 1413/5468 cut-off events. [2022-11-18 20:32:55,141 INFO L131 PetriNetUnfolder]: For 44252/44269 co-relation queries the response was YES. [2022-11-18 20:32:55,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24980 conditions, 5468 events. 1413/5468 cut-off events. For 44252/44269 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 62950 event pairs, 686 based on Foata normal form. 2/5292 useless extension candidates. Maximal degree in co-relation 24804. Up to 1830 conditions per place. [2022-11-18 20:32:55,327 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 222 selfloop transitions, 120 changer transitions 20/572 dead transitions. [2022-11-18 20:32:55,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 572 transitions, 6709 flow [2022-11-18 20:32:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:32:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:32:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3972 transitions. [2022-11-18 20:32:55,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8619791666666666 [2022-11-18 20:32:55,332 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3972 transitions. [2022-11-18 20:32:55,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3972 transitions. [2022-11-18 20:32:55,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:55,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3972 transitions. [2022-11-18 20:32:55,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 220.66666666666666) internal successors, (3972), 18 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states 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 20:32:55,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:32:55,345 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:32:55,345 INFO L175 Difference]: Start difference. First operand has 583 places, 521 transitions, 5402 flow. Second operand 18 states and 3972 transitions. [2022-11-18 20:32:55,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 572 transitions, 6709 flow [2022-11-18 20:32:55,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 572 transitions, 6471 flow, removed 119 selfloop flow, removed 2 redundant places. [2022-11-18 20:32:55,776 INFO L231 Difference]: Finished difference. Result has 604 places, 535 transitions, 5778 flow [2022-11-18 20:32:55,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=5210, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5778, PETRI_PLACES=604, PETRI_TRANSITIONS=535} [2022-11-18 20:32:55,778 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 372 predicate places. [2022-11-18 20:32:55,778 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 535 transitions, 5778 flow [2022-11-18 20:32:55,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:55,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:55,779 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] [2022-11-18 20:32:55,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 20:32:55,779 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1696554158, now seen corresponding path program 11 times [2022-11-18 20:32:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:55,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529917072] [2022-11-18 20:32:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:55,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:56,090 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 20:32:56,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:56,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529917072] [2022-11-18 20:32:56,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529917072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:56,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:56,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463186014] [2022-11-18 20:32:56,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:56,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:56,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:56,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:56,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 535 transitions, 5778 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:56,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:56,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:56,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:32:58,073 INFO L130 PetriNetUnfolder]: 1443/5772 cut-off events. [2022-11-18 20:32:58,073 INFO L131 PetriNetUnfolder]: For 50123/50201 co-relation queries the response was YES. [2022-11-18 20:32:58,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26055 conditions, 5772 events. 1443/5772 cut-off events. For 50123/50201 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 67189 event pairs, 771 based on Foata normal form. 2/5580 useless extension candidates. Maximal degree in co-relation 25872. Up to 1863 conditions per place. [2022-11-18 20:32:58,266 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 252 selfloop transitions, 113 changer transitions 15/590 dead transitions. [2022-11-18 20:32:58,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 590 transitions, 7235 flow [2022-11-18 20:32:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:32:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 20:32:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3756 transitions. [2022-11-18 20:32:58,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8630514705882353 [2022-11-18 20:32:58,270 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3756 transitions. [2022-11-18 20:32:58,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3756 transitions. [2022-11-18 20:32:58,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:32:58,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3756 transitions. [2022-11-18 20:32:58,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 220.94117647058823) internal successors, (3756), 17 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states 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 20:32:58,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states 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 20:32:58,282 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states 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 20:32:58,282 INFO L175 Difference]: Start difference. First operand has 604 places, 535 transitions, 5778 flow. Second operand 17 states and 3756 transitions. [2022-11-18 20:32:58,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 590 transitions, 7235 flow [2022-11-18 20:32:58,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 590 transitions, 7068 flow, removed 34 selfloop flow, removed 4 redundant places. [2022-11-18 20:32:58,771 INFO L231 Difference]: Finished difference. Result has 622 places, 553 transitions, 6317 flow [2022-11-18 20:32:58,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=5623, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6317, PETRI_PLACES=622, PETRI_TRANSITIONS=553} [2022-11-18 20:32:58,772 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 390 predicate places. [2022-11-18 20:32:58,772 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 553 transitions, 6317 flow [2022-11-18 20:32:58,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:58,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:32:58,773 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] [2022-11-18 20:32:58,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 20:32:58,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:32:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1904783822, now seen corresponding path program 12 times [2022-11-18 20:32:58,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:58,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881316710] [2022-11-18 20:32:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:58,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:59,089 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 20:32:59,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:59,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881316710] [2022-11-18 20:32:59,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881316710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:59,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:59,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:32:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442274261] [2022-11-18 20:32:59,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:59,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:59,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:59,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:32:59,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 553 transitions, 6317 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:32:59,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:32:59,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:32:59,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:01,361 INFO L130 PetriNetUnfolder]: 1433/5625 cut-off events. [2022-11-18 20:33:01,362 INFO L131 PetriNetUnfolder]: For 46975/46992 co-relation queries the response was YES. [2022-11-18 20:33:01,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26246 conditions, 5625 events. 1433/5625 cut-off events. For 46975/46992 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 65202 event pairs, 684 based on Foata normal form. 2/5445 useless extension candidates. Maximal degree in co-relation 26057. Up to 1853 conditions per place. [2022-11-18 20:33:01,693 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 250 selfloop transitions, 116 changer transitions 24/600 dead transitions. [2022-11-18 20:33:01,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 600 transitions, 7580 flow [2022-11-18 20:33:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:33:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:33:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3976 transitions. [2022-11-18 20:33:01,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8628472222222222 [2022-11-18 20:33:01,698 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3976 transitions. [2022-11-18 20:33:01,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3976 transitions. [2022-11-18 20:33:01,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:01,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3976 transitions. [2022-11-18 20:33:01,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 220.88888888888889) internal successors, (3976), 18 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states 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 20:33:01,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:33:01,706 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:33:01,706 INFO L175 Difference]: Start difference. First operand has 622 places, 553 transitions, 6317 flow. Second operand 18 states and 3976 transitions. [2022-11-18 20:33:01,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 600 transitions, 7580 flow [2022-11-18 20:33:02,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 600 transitions, 7364 flow, removed 83 selfloop flow, removed 3 redundant places. [2022-11-18 20:33:02,207 INFO L231 Difference]: Finished difference. Result has 641 places, 562 transitions, 6613 flow [2022-11-18 20:33:02,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=6133, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6613, PETRI_PLACES=641, PETRI_TRANSITIONS=562} [2022-11-18 20:33:02,208 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 409 predicate places. [2022-11-18 20:33:02,209 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 562 transitions, 6613 flow [2022-11-18 20:33:02,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:02,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:02,209 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] [2022-11-18 20:33:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-18 20:33:02,209 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1479144078, now seen corresponding path program 13 times [2022-11-18 20:33:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339260717] [2022-11-18 20:33:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:02,510 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 20:33:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339260717] [2022-11-18 20:33:02,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339260717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:02,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:02,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:33:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028837463] [2022-11-18 20:33:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:02,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:33:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:02,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:33:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:33:02,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:33:02,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 562 transitions, 6613 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:02,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:02,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:33:02,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:04,895 INFO L130 PetriNetUnfolder]: 1531/6143 cut-off events. [2022-11-18 20:33:04,895 INFO L131 PetriNetUnfolder]: For 58058/58075 co-relation queries the response was YES. [2022-11-18 20:33:05,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28720 conditions, 6143 events. 1531/6143 cut-off events. For 58058/58075 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 72710 event pairs, 624 based on Foata normal form. 2/5983 useless extension candidates. Maximal degree in co-relation 28526. Up to 1760 conditions per place. [2022-11-18 20:33:05,117 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 277 selfloop transitions, 143 changer transitions 23/653 dead transitions. [2022-11-18 20:33:05,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 653 transitions, 8586 flow [2022-11-18 20:33:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:33:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 20:33:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4847 transitions. [2022-11-18 20:33:05,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8606178977272727 [2022-11-18 20:33:05,123 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4847 transitions. [2022-11-18 20:33:05,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4847 transitions. [2022-11-18 20:33:05,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:05,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4847 transitions. [2022-11-18 20:33:05,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 220.3181818181818) internal successors, (4847), 22 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states 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 20:33:05,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 256.0) internal successors, (5888), 23 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states 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 20:33:05,136 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 256.0) internal successors, (5888), 23 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states 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 20:33:05,136 INFO L175 Difference]: Start difference. First operand has 641 places, 562 transitions, 6613 flow. Second operand 22 states and 4847 transitions. [2022-11-18 20:33:05,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 653 transitions, 8586 flow [2022-11-18 20:33:05,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 653 transitions, 8408 flow, removed 58 selfloop flow, removed 3 redundant places. [2022-11-18 20:33:05,734 INFO L231 Difference]: Finished difference. Result has 671 places, 594 transitions, 7493 flow [2022-11-18 20:33:05,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=6450, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7493, PETRI_PLACES=671, PETRI_TRANSITIONS=594} [2022-11-18 20:33:05,735 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 439 predicate places. [2022-11-18 20:33:05,735 INFO L495 AbstractCegarLoop]: Abstraction has has 671 places, 594 transitions, 7493 flow [2022-11-18 20:33:05,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:05,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:05,736 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] [2022-11-18 20:33:05,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-18 20:33:05,736 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:05,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1731184962, now seen corresponding path program 14 times [2022-11-18 20:33:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:05,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300901257] [2022-11-18 20:33:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:05,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:06,034 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 20:33:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300901257] [2022-11-18 20:33:06,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300901257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:06,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:06,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:33:06,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712423256] [2022-11-18 20:33:06,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:06,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:33:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:33:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:33:06,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:33:06,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 594 transitions, 7493 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:06,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:06,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:33:06,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:08,534 INFO L130 PetriNetUnfolder]: 1565/6372 cut-off events. [2022-11-18 20:33:08,534 INFO L131 PetriNetUnfolder]: For 65784/65801 co-relation queries the response was YES. [2022-11-18 20:33:08,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30924 conditions, 6372 events. 1565/6372 cut-off events. For 65784/65801 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 76401 event pairs, 636 based on Foata normal form. 2/6203 useless extension candidates. Maximal degree in co-relation 30717. Up to 1785 conditions per place. [2022-11-18 20:33:08,758 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 328 selfloop transitions, 105 changer transitions 21/664 dead transitions. [2022-11-18 20:33:08,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 664 transitions, 9333 flow [2022-11-18 20:33:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:33:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:33:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4629 transitions. [2022-11-18 20:33:08,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8610491071428571 [2022-11-18 20:33:08,763 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4629 transitions. [2022-11-18 20:33:08,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4629 transitions. [2022-11-18 20:33:08,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:08,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4629 transitions. [2022-11-18 20:33:08,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 220.42857142857142) internal successors, (4629), 21 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states 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 20:33:08,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states 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 20:33:08,775 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states 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 20:33:08,776 INFO L175 Difference]: Start difference. First operand has 671 places, 594 transitions, 7493 flow. Second operand 21 states and 4629 transitions. [2022-11-18 20:33:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 664 transitions, 9333 flow [2022-11-18 20:33:09,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 664 transitions, 9147 flow, removed 93 selfloop flow, removed 2 redundant places. [2022-11-18 20:33:09,469 INFO L231 Difference]: Finished difference. Result has 701 places, 618 transitions, 8173 flow [2022-11-18 20:33:09,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=7321, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8173, PETRI_PLACES=701, PETRI_TRANSITIONS=618} [2022-11-18 20:33:09,470 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 469 predicate places. [2022-11-18 20:33:09,470 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 618 transitions, 8173 flow [2022-11-18 20:33:09,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:09,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:09,471 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] [2022-11-18 20:33:09,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-18 20:33:09,471 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash 736156986, now seen corresponding path program 15 times [2022-11-18 20:33:09,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:09,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113825822] [2022-11-18 20:33:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:09,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:09,738 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 20:33:09,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113825822] [2022-11-18 20:33:09,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113825822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:09,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:09,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:33:09,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527606934] [2022-11-18 20:33:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:33:09,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:33:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:33:09,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:33:09,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 618 transitions, 8173 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:09,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:09,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:33:09,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:12,578 INFO L130 PetriNetUnfolder]: 1588/6562 cut-off events. [2022-11-18 20:33:12,578 INFO L131 PetriNetUnfolder]: For 70874/70891 co-relation queries the response was YES. [2022-11-18 20:33:12,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32343 conditions, 6562 events. 1588/6562 cut-off events. For 70874/70891 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 79840 event pairs, 626 based on Foata normal form. 2/6400 useless extension candidates. Maximal degree in co-relation 32123. Up to 1856 conditions per place. [2022-11-18 20:33:12,789 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 298 selfloop transitions, 161 changer transitions 18/687 dead transitions. [2022-11-18 20:33:12,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 687 transitions, 9951 flow [2022-11-18 20:33:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:33:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:33:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3973 transitions. [2022-11-18 20:33:12,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8621961805555556 [2022-11-18 20:33:12,793 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3973 transitions. [2022-11-18 20:33:12,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3973 transitions. [2022-11-18 20:33:12,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:12,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3973 transitions. [2022-11-18 20:33:12,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 220.72222222222223) internal successors, (3973), 18 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states 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 20:33:12,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:33:12,802 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:33:12,803 INFO L175 Difference]: Start difference. First operand has 701 places, 618 transitions, 8173 flow. Second operand 18 states and 3973 transitions. [2022-11-18 20:33:12,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 687 transitions, 9951 flow [2022-11-18 20:33:13,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 687 transitions, 9761 flow, removed 95 selfloop flow, removed 2 redundant places. [2022-11-18 20:33:13,583 INFO L231 Difference]: Finished difference. Result has 722 places, 639 transitions, 8827 flow [2022-11-18 20:33:13,584 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=7985, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8827, PETRI_PLACES=722, PETRI_TRANSITIONS=639} [2022-11-18 20:33:13,584 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 490 predicate places. [2022-11-18 20:33:13,585 INFO L495 AbstractCegarLoop]: Abstraction has has 722 places, 639 transitions, 8827 flow [2022-11-18 20:33:13,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:13,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:13,585 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] [2022-11-18 20:33:13,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-18 20:33:13,586 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash -184410972, now seen corresponding path program 16 times [2022-11-18 20:33:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:13,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763265362] [2022-11-18 20:33:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:13,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:13,873 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 20:33:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763265362] [2022-11-18 20:33:13,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763265362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:13,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:13,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:33:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944825546] [2022-11-18 20:33:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:13,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:33:13,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:33:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:33:13,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:33:13,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 639 transitions, 8827 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:13,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:13,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:33:13,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:16,989 INFO L130 PetriNetUnfolder]: 1643/6738 cut-off events. [2022-11-18 20:33:16,989 INFO L131 PetriNetUnfolder]: For 75319/75336 co-relation queries the response was YES. [2022-11-18 20:33:17,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34377 conditions, 6738 events. 1643/6738 cut-off events. For 75319/75336 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 82082 event pairs, 642 based on Foata normal form. 2/6567 useless extension candidates. Maximal degree in co-relation 34150. Up to 1899 conditions per place. [2022-11-18 20:33:17,706 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 338 selfloop transitions, 134 changer transitions 16/698 dead transitions. [2022-11-18 20:33:17,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 698 transitions, 10594 flow [2022-11-18 20:33:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:33:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 20:33:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3755 transitions. [2022-11-18 20:33:17,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8628216911764706 [2022-11-18 20:33:17,710 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3755 transitions. [2022-11-18 20:33:17,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3755 transitions. [2022-11-18 20:33:17,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:17,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3755 transitions. [2022-11-18 20:33:17,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 220.88235294117646) internal successors, (3755), 17 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states 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 20:33:17,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states 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 20:33:17,720 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states 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 20:33:17,720 INFO L175 Difference]: Start difference. First operand has 722 places, 639 transitions, 8827 flow. Second operand 17 states and 3755 transitions. [2022-11-18 20:33:17,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 698 transitions, 10594 flow [2022-11-18 20:33:18,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 698 transitions, 10374 flow, removed 110 selfloop flow, removed 2 redundant places. [2022-11-18 20:33:18,581 INFO L231 Difference]: Finished difference. Result has 743 places, 660 transitions, 9457 flow [2022-11-18 20:33:18,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=8651, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9457, PETRI_PLACES=743, PETRI_TRANSITIONS=660} [2022-11-18 20:33:18,583 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 511 predicate places. [2022-11-18 20:33:18,583 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 660 transitions, 9457 flow [2022-11-18 20:33:18,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:18,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:18,584 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] [2022-11-18 20:33:18,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-18 20:33:18,584 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1682367062, now seen corresponding path program 17 times [2022-11-18 20:33:18,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:18,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309583140] [2022-11-18 20:33:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:18,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:18,858 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 20:33:18,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:18,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309583140] [2022-11-18 20:33:18,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309583140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:18,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:18,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:33:18,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540432340] [2022-11-18 20:33:18,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:18,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:33:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:18,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:33:18,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:33:18,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:33:18,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 660 transitions, 9457 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:18,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:18,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:33:18,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:22,249 INFO L130 PetriNetUnfolder]: 1666/6873 cut-off events. [2022-11-18 20:33:22,249 INFO L131 PetriNetUnfolder]: For 79776/79793 co-relation queries the response was YES. [2022-11-18 20:33:22,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35770 conditions, 6873 events. 1666/6873 cut-off events. For 79776/79793 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 84068 event pairs, 639 based on Foata normal form. 2/6701 useless extension candidates. Maximal degree in co-relation 35535. Up to 1934 conditions per place. [2022-11-18 20:33:22,547 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 363 selfloop transitions, 126 changer transitions 17/716 dead transitions. [2022-11-18 20:33:22,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 716 transitions, 11233 flow [2022-11-18 20:33:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:33:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:33:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3975 transitions. [2022-11-18 20:33:22,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8626302083333334 [2022-11-18 20:33:22,554 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3975 transitions. [2022-11-18 20:33:22,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3975 transitions. [2022-11-18 20:33:22,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:22,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3975 transitions. [2022-11-18 20:33:22,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 220.83333333333334) internal successors, (3975), 18 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states 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 20:33:22,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:33:22,567 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:33:22,568 INFO L175 Difference]: Start difference. First operand has 743 places, 660 transitions, 9457 flow. Second operand 18 states and 3975 transitions. [2022-11-18 20:33:22,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 716 transitions, 11233 flow [2022-11-18 20:33:23,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 716 transitions, 11099 flow, removed 67 selfloop flow, removed 2 redundant places. [2022-11-18 20:33:23,907 INFO L231 Difference]: Finished difference. Result has 764 places, 679 transitions, 10118 flow [2022-11-18 20:33:23,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=9327, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10118, PETRI_PLACES=764, PETRI_TRANSITIONS=679} [2022-11-18 20:33:23,909 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 532 predicate places. [2022-11-18 20:33:23,909 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 679 transitions, 10118 flow [2022-11-18 20:33:23,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:23,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:23,910 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] [2022-11-18 20:33:23,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-18 20:33:23,911 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash 981837422, now seen corresponding path program 18 times [2022-11-18 20:33:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:23,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011549900] [2022-11-18 20:33:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:24,396 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 20:33:24,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011549900] [2022-11-18 20:33:24,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011549900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:24,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:24,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:33:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656461110] [2022-11-18 20:33:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:24,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:33:24,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:33:24,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:33:24,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:33:24,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 679 transitions, 10118 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:24,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:24,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:33:24,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:27,916 INFO L130 PetriNetUnfolder]: 1685/7014 cut-off events. [2022-11-18 20:33:27,916 INFO L131 PetriNetUnfolder]: For 86622/86639 co-relation queries the response was YES. [2022-11-18 20:33:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37129 conditions, 7014 events. 1685/7014 cut-off events. For 86622/86639 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 86881 event pairs, 636 based on Foata normal form. 2/6843 useless extension candidates. Maximal degree in co-relation 36887. Up to 1969 conditions per place. [2022-11-18 20:33:28,144 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 363 selfloop transitions, 133 changer transitions 22/728 dead transitions. [2022-11-18 20:33:28,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 728 transitions, 11739 flow [2022-11-18 20:33:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:33:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 20:33:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3759 transitions. [2022-11-18 20:33:28,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8637408088235294 [2022-11-18 20:33:28,148 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3759 transitions. [2022-11-18 20:33:28,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3759 transitions. [2022-11-18 20:33:28,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:28,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3759 transitions. [2022-11-18 20:33:28,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 221.11764705882354) internal successors, (3759), 17 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states 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 20:33:28,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states 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 20:33:28,158 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states 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 20:33:28,158 INFO L175 Difference]: Start difference. First operand has 764 places, 679 transitions, 10118 flow. Second operand 17 states and 3759 transitions. [2022-11-18 20:33:28,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 728 transitions, 11739 flow [2022-11-18 20:33:29,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 728 transitions, 11553 flow, removed 93 selfloop flow, removed 2 redundant places. [2022-11-18 20:33:29,200 INFO L231 Difference]: Finished difference. Result has 783 places, 692 transitions, 10597 flow [2022-11-18 20:33:29,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=9948, PETRI_DIFFERENCE_MINUEND_PLACES=760, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10597, PETRI_PLACES=783, PETRI_TRANSITIONS=692} [2022-11-18 20:33:29,202 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 551 predicate places. [2022-11-18 20:33:29,202 INFO L495 AbstractCegarLoop]: Abstraction has has 783 places, 692 transitions, 10597 flow [2022-11-18 20:33:29,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:29,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:29,203 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] [2022-11-18 20:33:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-18 20:33:29,204 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1843708722, now seen corresponding path program 19 times [2022-11-18 20:33:29,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:29,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171994096] [2022-11-18 20:33:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:29,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:29,581 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 20:33:29,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:29,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171994096] [2022-11-18 20:33:29,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171994096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:29,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:29,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:33:29,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155483660] [2022-11-18 20:33:29,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:29,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:33:29,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:33:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:33:29,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:33:29,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 783 places, 692 transitions, 10597 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:29,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:29,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:33:29,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:33,561 INFO L130 PetriNetUnfolder]: 1688/7241 cut-off events. [2022-11-18 20:33:33,561 INFO L131 PetriNetUnfolder]: For 91026/91043 co-relation queries the response was YES. [2022-11-18 20:33:33,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38089 conditions, 7241 events. 1688/7241 cut-off events. For 91026/91043 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 90286 event pairs, 630 based on Foata normal form. 2/7081 useless extension candidates. Maximal degree in co-relation 37841. Up to 1981 conditions per place. [2022-11-18 20:33:33,900 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 329 selfloop transitions, 184 changer transitions 22/745 dead transitions. [2022-11-18 20:33:33,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 745 transitions, 12182 flow [2022-11-18 20:33:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:33:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-18 20:33:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3539 transitions. [2022-11-18 20:33:33,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.864013671875 [2022-11-18 20:33:33,904 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3539 transitions. [2022-11-18 20:33:33,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3539 transitions. [2022-11-18 20:33:33,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:33,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3539 transitions. [2022-11-18 20:33:33,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 221.1875) internal successors, (3539), 16 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states 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 20:33:33,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 256.0) internal successors, (4352), 17 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states 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 20:33:33,909 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 256.0) internal successors, (4352), 17 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states 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 20:33:33,910 INFO L175 Difference]: Start difference. First operand has 783 places, 692 transitions, 10597 flow. Second operand 16 states and 3539 transitions. [2022-11-18 20:33:33,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 745 transitions, 12182 flow [2022-11-18 20:33:35,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 745 transitions, 12008 flow, removed 51 selfloop flow, removed 3 redundant places. [2022-11-18 20:33:35,068 INFO L231 Difference]: Finished difference. Result has 800 places, 700 transitions, 11025 flow [2022-11-18 20:33:35,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=10430, PETRI_DIFFERENCE_MINUEND_PLACES=778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11025, PETRI_PLACES=800, PETRI_TRANSITIONS=700} [2022-11-18 20:33:35,069 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 568 predicate places. [2022-11-18 20:33:35,069 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 700 transitions, 11025 flow [2022-11-18 20:33:35,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:35,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:35,070 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] [2022-11-18 20:33:35,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-18 20:33:35,070 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1644333558, now seen corresponding path program 20 times [2022-11-18 20:33:35,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:35,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777545641] [2022-11-18 20:33:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:35,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:35,305 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 20:33:35,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:35,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777545641] [2022-11-18 20:33:35,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777545641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:35,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:35,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:33:35,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161742233] [2022-11-18 20:33:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:35,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:33:35,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:33:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:33:35,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 256 [2022-11-18 20:33:35,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 700 transitions, 11025 flow. Second operand has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:35,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:35,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 256 [2022-11-18 20:33:35,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:39,282 INFO L130 PetriNetUnfolder]: 1688/7275 cut-off events. [2022-11-18 20:33:39,283 INFO L131 PetriNetUnfolder]: For 93718/93735 co-relation queries the response was YES. [2022-11-18 20:33:39,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38638 conditions, 7275 events. 1688/7275 cut-off events. For 93718/93735 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 91112 event pairs, 634 based on Foata normal form. 2/7107 useless extension candidates. Maximal degree in co-relation 38390. Up to 1977 conditions per place. [2022-11-18 20:33:39,700 INFO L137 encePairwiseOnDemand]: 243/256 looper letters, 358 selfloop transitions, 152 changer transitions 25/745 dead transitions. [2022-11-18 20:33:39,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 745 transitions, 12557 flow [2022-11-18 20:33:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:33:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:33:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3975 transitions. [2022-11-18 20:33:39,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8626302083333334 [2022-11-18 20:33:39,714 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3975 transitions. [2022-11-18 20:33:39,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3975 transitions. [2022-11-18 20:33:39,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:39,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3975 transitions. [2022-11-18 20:33:39,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 220.83333333333334) internal successors, (3975), 18 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states 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 20:33:39,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:33:39,725 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 256.0) internal successors, (4864), 19 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states 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 20:33:39,725 INFO L175 Difference]: Start difference. First operand has 800 places, 700 transitions, 11025 flow. Second operand 18 states and 3975 transitions. [2022-11-18 20:33:39,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 745 transitions, 12557 flow [2022-11-18 20:33:40,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 745 transitions, 12239 flow, removed 39 selfloop flow, removed 5 redundant places. [2022-11-18 20:33:40,756 INFO L231 Difference]: Finished difference. Result has 817 places, 709 transitions, 11310 flow [2022-11-18 20:33:40,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=10723, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11310, PETRI_PLACES=817, PETRI_TRANSITIONS=709} [2022-11-18 20:33:40,757 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 585 predicate places. [2022-11-18 20:33:40,757 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 709 transitions, 11310 flow [2022-11-18 20:33:40,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.6) internal successors, (2176), 10 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 20:33:40,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:40,757 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] [2022-11-18 20:33:40,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-18 20:33:40,757 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:40,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:40,758 INFO L85 PathProgramCache]: Analyzing trace with hash 202589522, now seen corresponding path program 1 times [2022-11-18 20:33:40,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:40,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039894750] [2022-11-18 20:33:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:40,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:40,794 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 20:33:40,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:40,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039894750] [2022-11-18 20:33:40,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039894750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:40,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:40,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:33:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511574169] [2022-11-18 20:33:40,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:33:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:33:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:33:40,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 256 [2022-11-18 20:33:40,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 709 transitions, 11310 flow. Second operand has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 20:33:40,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:40,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 256 [2022-11-18 20:33:40,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:42,979 INFO L130 PetriNetUnfolder]: 686/5735 cut-off events. [2022-11-18 20:33:42,979 INFO L131 PetriNetUnfolder]: For 68839/69546 co-relation queries the response was YES. [2022-11-18 20:33:43,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27979 conditions, 5735 events. 686/5735 cut-off events. For 68839/69546 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 67925 event pairs, 37 based on Foata normal form. 1/5596 useless extension candidates. Maximal degree in co-relation 27729. Up to 361 conditions per place. [2022-11-18 20:33:43,145 INFO L137 encePairwiseOnDemand]: 252/256 looper letters, 26 selfloop transitions, 2 changer transitions 0/717 dead transitions. [2022-11-18 20:33:43,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 717 transitions, 11408 flow [2022-11-18 20:33:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:33:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:33:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2022-11-18 20:33:43,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.94140625 [2022-11-18 20:33:43,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2022-11-18 20:33:43,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2022-11-18 20:33:43,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:43,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2022-11-18 20:33:43,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 20:33:43,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:33:43,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:33:43,149 INFO L175 Difference]: Start difference. First operand has 817 places, 709 transitions, 11310 flow. Second operand 3 states and 723 transitions. [2022-11-18 20:33:43,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 717 transitions, 11408 flow [2022-11-18 20:33:44,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 813 places, 717 transitions, 11215 flow, removed 59 selfloop flow, removed 4 redundant places. [2022-11-18 20:33:44,180 INFO L231 Difference]: Finished difference. Result has 815 places, 711 transitions, 11137 flow [2022-11-18 20:33:44,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=11117, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=11137, PETRI_PLACES=815, PETRI_TRANSITIONS=711} [2022-11-18 20:33:44,182 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 583 predicate places. [2022-11-18 20:33:44,182 INFO L495 AbstractCegarLoop]: Abstraction has has 815 places, 711 transitions, 11137 flow [2022-11-18 20:33:44,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 20:33:44,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:44,183 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] [2022-11-18 20:33:44,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-18 20:33:44,184 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash -376270024, now seen corresponding path program 2 times [2022-11-18 20:33:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:44,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600987138] [2022-11-18 20:33:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:44,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:44,230 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 20:33:44,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:44,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600987138] [2022-11-18 20:33:44,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600987138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:44,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:44,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:33:44,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505565720] [2022-11-18 20:33:44,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:44,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:33:44,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:33:44,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:33:44,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 256 [2022-11-18 20:33:44,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 815 places, 711 transitions, 11137 flow. Second operand has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 20:33:44,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:44,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 256 [2022-11-18 20:33:44,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:46,392 INFO L130 PetriNetUnfolder]: 690/5745 cut-off events. [2022-11-18 20:33:46,393 INFO L131 PetriNetUnfolder]: For 62405/62461 co-relation queries the response was YES. [2022-11-18 20:33:46,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27162 conditions, 5745 events. 690/5745 cut-off events. For 62405/62461 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 68049 event pairs, 34 based on Foata normal form. 11/5629 useless extension candidates. Maximal degree in co-relation 26812. Up to 359 conditions per place. [2022-11-18 20:33:46,827 INFO L137 encePairwiseOnDemand]: 250/256 looper letters, 24 selfloop transitions, 4 changer transitions 2/719 dead transitions. [2022-11-18 20:33:46,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 719 transitions, 11243 flow [2022-11-18 20:33:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:33:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:33:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2022-11-18 20:33:46,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.94140625 [2022-11-18 20:33:46,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2022-11-18 20:33:46,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2022-11-18 20:33:46,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:46,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2022-11-18 20:33:46,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 20:33:46,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:33:46,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 20:33:46,830 INFO L175 Difference]: Start difference. First operand has 815 places, 711 transitions, 11137 flow. Second operand 3 states and 723 transitions. [2022-11-18 20:33:46,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 719 transitions, 11243 flow [2022-11-18 20:33:47,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 719 transitions, 11241 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:33:47,618 INFO L231 Difference]: Finished difference. Result has 818 places, 713 transitions, 11167 flow [2022-11-18 20:33:47,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=11135, PETRI_DIFFERENCE_MINUEND_PLACES=814, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=11167, PETRI_PLACES=818, PETRI_TRANSITIONS=713} [2022-11-18 20:33:47,620 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 586 predicate places. [2022-11-18 20:33:47,620 INFO L495 AbstractCegarLoop]: Abstraction has has 818 places, 713 transitions, 11167 flow [2022-11-18 20:33:47,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states 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 20:33:47,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:47,621 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:47,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-18 20:33:47,621 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:47,622 INFO L85 PathProgramCache]: Analyzing trace with hash 819917280, now seen corresponding path program 1 times [2022-11-18 20:33:47,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:47,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548477452] [2022-11-18 20:33:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:48,339 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 20:33:48,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:48,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548477452] [2022-11-18 20:33:48,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548477452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:33:48,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:33:48,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:33:48,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336906336] [2022-11-18 20:33:48,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:48,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:33:48,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:33:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:33:48,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 256 [2022-11-18 20:33:48,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 713 transitions, 11167 flow. Second operand has 12 states, 12 states have (on average 205.66666666666666) internal successors, (2468), 12 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states 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 20:33:48,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:33:48,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 256 [2022-11-18 20:33:48,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:33:57,061 INFO L130 PetriNetUnfolder]: 3387/11338 cut-off events. [2022-11-18 20:33:57,061 INFO L131 PetriNetUnfolder]: For 96400/96507 co-relation queries the response was YES. [2022-11-18 20:33:57,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48479 conditions, 11338 events. 3387/11338 cut-off events. For 96400/96507 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 142323 event pairs, 1839 based on Foata normal form. 1/10924 useless extension candidates. Maximal degree in co-relation 48064. Up to 5996 conditions per place. [2022-11-18 20:33:57,967 INFO L137 encePairwiseOnDemand]: 239/256 looper letters, 621 selfloop transitions, 56 changer transitions 43/922 dead transitions. [2022-11-18 20:33:57,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 922 transitions, 13707 flow [2022-11-18 20:33:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:33:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 20:33:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 8155 transitions. [2022-11-18 20:33:57,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8168068910256411 [2022-11-18 20:33:57,981 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 8155 transitions. [2022-11-18 20:33:57,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 8155 transitions. [2022-11-18 20:33:57,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:33:57,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 8155 transitions. [2022-11-18 20:33:58,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 209.10256410256412) internal successors, (8155), 39 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states 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 20:33:58,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 256.0) internal successors, (10240), 40 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states 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 20:33:58,024 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 256.0) internal successors, (10240), 40 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states 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 20:33:58,024 INFO L175 Difference]: Start difference. First operand has 818 places, 713 transitions, 11167 flow. Second operand 39 states and 8155 transitions. [2022-11-18 20:33:58,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 922 transitions, 13707 flow [2022-11-18 20:33:59,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 854 places, 922 transitions, 13695 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 20:33:59,240 INFO L231 Difference]: Finished difference. Result has 888 places, 768 transitions, 11680 flow [2022-11-18 20:33:59,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=11155, PETRI_DIFFERENCE_MINUEND_PLACES=816, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11680, PETRI_PLACES=888, PETRI_TRANSITIONS=768} [2022-11-18 20:33:59,242 INFO L288 CegarLoopForPetriNet]: 232 programPoint places, 656 predicate places. [2022-11-18 20:33:59,242 INFO L495 AbstractCegarLoop]: Abstraction has has 888 places, 768 transitions, 11680 flow [2022-11-18 20:33:59,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.66666666666666) internal successors, (2468), 12 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states 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 20:33:59,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:33:59,243 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:59,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-18 20:33:59,244 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:33:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash -451077124, now seen corresponding path program 2 times [2022-11-18 20:33:59,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:59,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949304183] [2022-11-18 20:33:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:59,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat