./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:52:00,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:52:00,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:52:00,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:52:00,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:52:00,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:52:00,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:52:00,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:52:00,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:52:00,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:52:00,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:52:00,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:52:00,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:52:00,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:52:00,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:52:00,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:52:00,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:52:00,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:52:00,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:52:00,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:52:00,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:52:00,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:52:00,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:52:00,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:52:00,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:52:00,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:52:00,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:52:00,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:52:00,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:52:00,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:52:00,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:52:00,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:52:00,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:52:00,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:52:00,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:52:00,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:52:00,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:52:00,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:52:00,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:52:00,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:52:00,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:52:00,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:52:01,020 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:52:01,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:52:01,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:52:01,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:52:01,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:52:01,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:52:01,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:52:01,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:52:01,026 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:52:01,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:52:01,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:52:01,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:52:01,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:52:01,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:52:01,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:52:01,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:52:01,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:52:01,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:52:01,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:52:01,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:52:01,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:52:01,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:52:01,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:52:01,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:52:01,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:01,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:52:01,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:52:01,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:52:01,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:52:01,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:52:01,035 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:52:01,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:52:01,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:52:01,036 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_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-11-16 12:52:01,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:52:01,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:52:01,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:52:01,393 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:52:01,397 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:52:01,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-16 12:52:01,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/data/46b9ea808/cb8de1131d5a4d218dadf26c2cdff806/FLAG6f1c29176 [2022-11-16 12:52:02,045 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:52:02,046 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-16 12:52:02,054 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/data/46b9ea808/cb8de1131d5a4d218dadf26c2cdff806/FLAG6f1c29176 [2022-11-16 12:52:02,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/data/46b9ea808/cb8de1131d5a4d218dadf26c2cdff806 [2022-11-16 12:52:02,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:52:02,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:52:02,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:02,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:52:02,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:52:02,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450b1ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02, skipping insertion in model container [2022-11-16 12:52:02,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:52:02,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:52:02,803 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-16 12:52:02,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:02,822 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:52:02,854 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-16 12:52:02,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:02,875 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:52:02,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02 WrapperNode [2022-11-16 12:52:02,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:02,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:02,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:52:02,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:52:02,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,926 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 176 [2022-11-16 12:52:02,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:02,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:52:02,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:52:02,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:52:02,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,993 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:02,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:52:02,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:52:02,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:52:02,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:52:03,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (1/1) ... [2022-11-16 12:52:03,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:03,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:52:03,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:52:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:52:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:52:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:52:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:52:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:52:03,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:52:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:52:03,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:52:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:52:03,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:52:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:52:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:52:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:52:03,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:52:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:52:03,101 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:52:03,288 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:52:03,292 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:52:03,977 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:52:04,033 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:52:04,037 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 12:52:04,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:04 BoogieIcfgContainer [2022-11-16 12:52:04,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:52:04,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:52:04,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:52:04,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:52:04,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:52:02" (1/3) ... [2022-11-16 12:52:04,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75147edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:04, skipping insertion in model container [2022-11-16 12:52:04,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:02" (2/3) ... [2022-11-16 12:52:04,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75147edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:04, skipping insertion in model container [2022-11-16 12:52:04,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:04" (3/3) ... [2022-11-16 12:52:04,053 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2022-11-16 12:52:04,077 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:52:04,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:52:04,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:52:04,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:52:04,276 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:52:04,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 310 transitions, 644 flow [2022-11-16 12:52:04,545 INFO L130 PetriNetUnfolder]: 29/307 cut-off events. [2022-11-16 12:52:04,546 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:52:04,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 307 events. 29/307 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 368 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-11-16 12:52:04,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 310 transitions, 644 flow [2022-11-16 12:52:04,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 296 transitions, 610 flow [2022-11-16 12:52:04,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:52:04,603 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;@2daad205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:52:04,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 12:52:04,730 INFO L130 PetriNetUnfolder]: 29/295 cut-off events. [2022-11-16 12:52:04,745 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:52:04,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:04,746 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:04,747 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)] === [2022-11-16 12:52:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash 516346238, now seen corresponding path program 1 times [2022-11-16 12:52:04,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:04,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362760668] [2022-11-16 12:52:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362760668] [2022-11-16 12:52:05,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362760668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:05,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:05,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957894759] [2022-11-16 12:52:05,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:05,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:52:05,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:52:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:52:05,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 310 [2022-11-16 12:52:05,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 296 transitions, 610 flow. Second operand has 2 states, 2 states have (on average 293.5) internal successors, (587), 2 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:05,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 310 [2022-11-16 12:52:05,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:05,464 INFO L130 PetriNetUnfolder]: 15/282 cut-off events. [2022-11-16 12:52:05,464 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-16 12:52:05,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 15/282 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 355 event pairs, 0 based on Foata normal form. 20/279 useless extension candidates. Maximal degree in co-relation 232. Up to 7 conditions per place. [2022-11-16 12:52:05,480 INFO L137 encePairwiseOnDemand]: 296/310 looper letters, 6 selfloop transitions, 0 changer transitions 8/282 dead transitions. [2022-11-16 12:52:05,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 282 transitions, 594 flow [2022-11-16 12:52:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:52:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:52:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 598 transitions. [2022-11-16 12:52:05,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.964516129032258 [2022-11-16 12:52:05,511 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 598 transitions. [2022-11-16 12:52:05,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 598 transitions. [2022-11-16 12:52:05,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:05,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 598 transitions. [2022-11-16 12:52:05,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 299.0) internal successors, (598), 2 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,543 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,545 INFO L175 Difference]: Start difference. First operand has 277 places, 296 transitions, 610 flow. Second operand 2 states and 598 transitions. [2022-11-16 12:52:05,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 282 transitions, 594 flow [2022-11-16 12:52:05,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 282 transitions, 582 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 12:52:05,566 INFO L231 Difference]: Finished difference. Result has 272 places, 274 transitions, 554 flow [2022-11-16 12:52:05,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=554, PETRI_PLACES=272, PETRI_TRANSITIONS=274} [2022-11-16 12:52:05,574 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, -5 predicate places. [2022-11-16 12:52:05,575 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 274 transitions, 554 flow [2022-11-16 12:52:05,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 293.5) internal successors, (587), 2 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:05,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:05,577 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:05,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:52:05,578 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)] === [2022-11-16 12:52:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash -425510803, now seen corresponding path program 1 times [2022-11-16 12:52:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:05,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743735934] [2022-11-16 12:52:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:05,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:06,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:06,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743735934] [2022-11-16 12:52:06,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743735934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:06,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:06,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:52:06,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334586618] [2022-11-16 12:52:06,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:06,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:52:06,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:52:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:06,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 310 [2022-11-16 12:52:06,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 274 transitions, 554 flow. Second operand has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:06,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:06,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 310 [2022-11-16 12:52:06,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:07,019 INFO L130 PetriNetUnfolder]: 25/323 cut-off events. [2022-11-16 12:52:07,020 INFO L131 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2022-11-16 12:52:07,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 323 events. 25/323 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 647 event pairs, 1 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 394. Up to 48 conditions per place. [2022-11-16 12:52:07,027 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 44 selfloop transitions, 3 changer transitions 4/283 dead transitions. [2022-11-16 12:52:07,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 283 transitions, 679 flow [2022-11-16 12:52:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:52:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:52:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1277 transitions. [2022-11-16 12:52:07,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8238709677419355 [2022-11-16 12:52:07,034 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1277 transitions. [2022-11-16 12:52:07,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1277 transitions. [2022-11-16 12:52:07,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:07,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1277 transitions. [2022-11-16 12:52:07,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 255.4) internal successors, (1277), 5 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,046 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,046 INFO L175 Difference]: Start difference. First operand has 272 places, 274 transitions, 554 flow. Second operand 5 states and 1277 transitions. [2022-11-16 12:52:07,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 283 transitions, 679 flow [2022-11-16 12:52:07,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 283 transitions, 679 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:07,058 INFO L231 Difference]: Finished difference. Result has 271 places, 275 transitions, 573 flow [2022-11-16 12:52:07,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=573, PETRI_PLACES=271, PETRI_TRANSITIONS=275} [2022-11-16 12:52:07,061 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, -6 predicate places. [2022-11-16 12:52:07,061 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 275 transitions, 573 flow [2022-11-16 12:52:07,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:07,063 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:07,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:52:07,064 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)] === [2022-11-16 12:52:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:07,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1715212543, now seen corresponding path program 1 times [2022-11-16 12:52:07,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:07,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065478683] [2022-11-16 12:52:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:07,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:07,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:07,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065478683] [2022-11-16 12:52:07,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065478683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:07,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:07,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:07,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240432692] [2022-11-16 12:52:07,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:07,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:07,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:07,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 310 [2022-11-16 12:52:07,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 275 transitions, 573 flow. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:07,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 310 [2022-11-16 12:52:07,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:07,526 INFO L130 PetriNetUnfolder]: 24/405 cut-off events. [2022-11-16 12:52:07,526 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-16 12:52:07,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 405 events. 24/405 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1164 event pairs, 6 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 479. Up to 25 conditions per place. [2022-11-16 12:52:07,531 INFO L137 encePairwiseOnDemand]: 307/310 looper letters, 14 selfloop transitions, 2 changer transitions 0/281 dead transitions. [2022-11-16 12:52:07,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 281 transitions, 622 flow [2022-11-16 12:52:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2022-11-16 12:52:07,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9376344086021505 [2022-11-16 12:52:07,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2022-11-16 12:52:07,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2022-11-16 12:52:07,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:07,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2022-11-16 12:52:07,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,545 INFO L175 Difference]: Start difference. First operand has 271 places, 275 transitions, 573 flow. Second operand 3 states and 872 transitions. [2022-11-16 12:52:07,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 281 transitions, 622 flow [2022-11-16 12:52:07,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 281 transitions, 615 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 12:52:07,556 INFO L231 Difference]: Finished difference. Result has 269 places, 275 transitions, 574 flow [2022-11-16 12:52:07,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=574, PETRI_PLACES=269, PETRI_TRANSITIONS=275} [2022-11-16 12:52:07,560 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, -8 predicate places. [2022-11-16 12:52:07,560 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 275 transitions, 574 flow [2022-11-16 12:52:07,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:07,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:07,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:52:07,562 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)] === [2022-11-16 12:52:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1589648917, now seen corresponding path program 1 times [2022-11-16 12:52:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795423678] [2022-11-16 12:52:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:07,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:09,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:09,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795423678] [2022-11-16 12:52:09,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795423678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:09,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:09,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:52:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652103450] [2022-11-16 12:52:09,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:09,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:09,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 310 [2022-11-16 12:52:09,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 275 transitions, 574 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:09,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:09,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 310 [2022-11-16 12:52:09,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:10,895 INFO L130 PetriNetUnfolder]: 614/2328 cut-off events. [2022-11-16 12:52:10,895 INFO L131 PetriNetUnfolder]: For 195/207 co-relation queries the response was YES. [2022-11-16 12:52:10,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 2328 events. 614/2328 cut-off events. For 195/207 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18365 event pairs, 302 based on Foata normal form. 2/1922 useless extension candidates. Maximal degree in co-relation 3249. Up to 365 conditions per place. [2022-11-16 12:52:10,920 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 87 selfloop transitions, 3 changer transitions 11/317 dead transitions. [2022-11-16 12:52:10,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 317 transitions, 876 flow [2022-11-16 12:52:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1698 transitions. [2022-11-16 12:52:10,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7824884792626728 [2022-11-16 12:52:10,926 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1698 transitions. [2022-11-16 12:52:10,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1698 transitions. [2022-11-16 12:52:10,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:10,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1698 transitions. [2022-11-16 12:52:10,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 242.57142857142858) internal successors, (1698), 7 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,940 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,941 INFO L175 Difference]: Start difference. First operand has 269 places, 275 transitions, 574 flow. Second operand 7 states and 1698 transitions. [2022-11-16 12:52:10,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 317 transitions, 876 flow [2022-11-16 12:52:10,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 317 transitions, 872 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:10,950 INFO L231 Difference]: Finished difference. Result has 278 places, 277 transitions, 595 flow [2022-11-16 12:52:10,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=595, PETRI_PLACES=278, PETRI_TRANSITIONS=277} [2022-11-16 12:52:10,951 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 1 predicate places. [2022-11-16 12:52:10,952 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 277 transitions, 595 flow [2022-11-16 12:52:10,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:10,954 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:10,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:52:10,954 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)] === [2022-11-16 12:52:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:10,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1882231509, now seen corresponding path program 2 times [2022-11-16 12:52:10,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:10,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20521242] [2022-11-16 12:52:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:10,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:12,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20521242] [2022-11-16 12:52:12,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20521242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:12,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:12,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:52:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494107725] [2022-11-16 12:52:12,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:12,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:12,333 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 310 [2022-11-16 12:52:12,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 277 transitions, 595 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:12,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 310 [2022-11-16 12:52:12,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:13,460 INFO L130 PetriNetUnfolder]: 565/2889 cut-off events. [2022-11-16 12:52:13,460 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2022-11-16 12:52:13,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4218 conditions, 2889 events. 565/2889 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 26019 event pairs, 179 based on Foata normal form. 2/2602 useless extension candidates. Maximal degree in co-relation 4207. Up to 421 conditions per place. [2022-11-16 12:52:13,483 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 86 selfloop transitions, 2 changer transitions 13/317 dead transitions. [2022-11-16 12:52:13,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 317 transitions, 908 flow [2022-11-16 12:52:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1697 transitions. [2022-11-16 12:52:13,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7820276497695853 [2022-11-16 12:52:13,489 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1697 transitions. [2022-11-16 12:52:13,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1697 transitions. [2022-11-16 12:52:13,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:13,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1697 transitions. [2022-11-16 12:52:13,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 242.42857142857142) internal successors, (1697), 7 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,503 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,504 INFO L175 Difference]: Start difference. First operand has 278 places, 277 transitions, 595 flow. Second operand 7 states and 1697 transitions. [2022-11-16 12:52:13,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 317 transitions, 908 flow [2022-11-16 12:52:13,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 317 transitions, 897 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-16 12:52:13,518 INFO L231 Difference]: Finished difference. Result has 284 places, 277 transitions, 605 flow [2022-11-16 12:52:13,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=605, PETRI_PLACES=284, PETRI_TRANSITIONS=277} [2022-11-16 12:52:13,522 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 7 predicate places. [2022-11-16 12:52:13,522 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 277 transitions, 605 flow [2022-11-16 12:52:13,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:13,524 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:13,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:52:13,525 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)] === [2022-11-16 12:52:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2084932739, now seen corresponding path program 3 times [2022-11-16 12:52:13,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:13,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108673077] [2022-11-16 12:52:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:14,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:14,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108673077] [2022-11-16 12:52:14,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108673077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:14,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:14,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:52:14,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704102235] [2022-11-16 12:52:14,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:14,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:14,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:14,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 310 [2022-11-16 12:52:14,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 277 transitions, 605 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:14,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 310 [2022-11-16 12:52:14,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:16,063 INFO L130 PetriNetUnfolder]: 622/3268 cut-off events. [2022-11-16 12:52:16,063 INFO L131 PetriNetUnfolder]: For 766/770 co-relation queries the response was YES. [2022-11-16 12:52:16,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 3268 events. 622/3268 cut-off events. For 766/770 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 30464 event pairs, 337 based on Foata normal form. 4/2858 useless extension candidates. Maximal degree in co-relation 4761. Up to 676 conditions per place. [2022-11-16 12:52:16,092 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 88 selfloop transitions, 3 changer transitions 15/322 dead transitions. [2022-11-16 12:52:16,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 322 transitions, 969 flow [2022-11-16 12:52:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1700 transitions. [2022-11-16 12:52:16,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.783410138248848 [2022-11-16 12:52:16,097 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1700 transitions. [2022-11-16 12:52:16,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1700 transitions. [2022-11-16 12:52:16,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:16,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1700 transitions. [2022-11-16 12:52:16,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 242.85714285714286) internal successors, (1700), 7 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:16,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:16,109 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:16,109 INFO L175 Difference]: Start difference. First operand has 284 places, 277 transitions, 605 flow. Second operand 7 states and 1700 transitions. [2022-11-16 12:52:16,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 322 transitions, 969 flow [2022-11-16 12:52:16,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 322 transitions, 932 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:16,122 INFO L231 Difference]: Finished difference. Result has 286 places, 278 transitions, 624 flow [2022-11-16 12:52:16,123 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=624, PETRI_PLACES=286, PETRI_TRANSITIONS=278} [2022-11-16 12:52:16,124 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 9 predicate places. [2022-11-16 12:52:16,124 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 278 transitions, 624 flow [2022-11-16 12:52:16,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:16,125 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:16,125 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:16,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:52:16,126 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)] === [2022-11-16 12:52:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:16,127 INFO L85 PathProgramCache]: Analyzing trace with hash 912702115, now seen corresponding path program 4 times [2022-11-16 12:52:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:16,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430800585] [2022-11-16 12:52:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:16,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:17,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430800585] [2022-11-16 12:52:17,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430800585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:17,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:17,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:52:17,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115905541] [2022-11-16 12:52:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:17,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:17,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:17,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 310 [2022-11-16 12:52:17,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 278 transitions, 624 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:17,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:17,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 310 [2022-11-16 12:52:17,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:18,937 INFO L130 PetriNetUnfolder]: 632/3396 cut-off events. [2022-11-16 12:52:18,937 INFO L131 PetriNetUnfolder]: For 1232/1232 co-relation queries the response was YES. [2022-11-16 12:52:18,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 3396 events. 632/3396 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 32495 event pairs, 382 based on Foata normal form. 2/3010 useless extension candidates. Maximal degree in co-relation 5157. Up to 837 conditions per place. [2022-11-16 12:52:18,971 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 91 selfloop transitions, 4 changer transitions 12/323 dead transitions. [2022-11-16 12:52:18,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 323 transitions, 981 flow [2022-11-16 12:52:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1701 transitions. [2022-11-16 12:52:18,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7838709677419354 [2022-11-16 12:52:18,978 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1701 transitions. [2022-11-16 12:52:18,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1701 transitions. [2022-11-16 12:52:18,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:18,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1701 transitions. [2022-11-16 12:52:18,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 243.0) internal successors, (1701), 7 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:18,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:18,991 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:18,992 INFO L175 Difference]: Start difference. First operand has 286 places, 278 transitions, 624 flow. Second operand 7 states and 1701 transitions. [2022-11-16 12:52:18,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 323 transitions, 981 flow [2022-11-16 12:52:19,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 323 transitions, 948 flow, removed 14 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:19,012 INFO L231 Difference]: Finished difference. Result has 289 places, 279 transitions, 640 flow [2022-11-16 12:52:19,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=640, PETRI_PLACES=289, PETRI_TRANSITIONS=279} [2022-11-16 12:52:19,013 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 12 predicate places. [2022-11-16 12:52:19,014 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 279 transitions, 640 flow [2022-11-16 12:52:19,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:19,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:19,016 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:19,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:52:19,016 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)] === [2022-11-16 12:52:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash 472752943, now seen corresponding path program 5 times [2022-11-16 12:52:19,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:19,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129776510] [2022-11-16 12:52:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129776510] [2022-11-16 12:52:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129776510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:20,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:20,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:52:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262153422] [2022-11-16 12:52:20,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:20,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 310 [2022-11-16 12:52:20,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 279 transitions, 640 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:20,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:20,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 310 [2022-11-16 12:52:20,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:21,651 INFO L130 PetriNetUnfolder]: 649/3483 cut-off events. [2022-11-16 12:52:21,651 INFO L131 PetriNetUnfolder]: For 1357/1361 co-relation queries the response was YES. [2022-11-16 12:52:21,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5234 conditions, 3483 events. 649/3483 cut-off events. For 1357/1361 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 33363 event pairs, 373 based on Foata normal form. 4/3040 useless extension candidates. Maximal degree in co-relation 5218. Up to 765 conditions per place. [2022-11-16 12:52:21,682 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 93 selfloop transitions, 4 changer transitions 12/325 dead transitions. [2022-11-16 12:52:21,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 325 transitions, 999 flow [2022-11-16 12:52:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:21,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1702 transitions. [2022-11-16 12:52:21,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.784331797235023 [2022-11-16 12:52:21,688 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1702 transitions. [2022-11-16 12:52:21,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1702 transitions. [2022-11-16 12:52:21,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:21,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1702 transitions. [2022-11-16 12:52:21,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 243.14285714285714) internal successors, (1702), 7 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:21,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:21,703 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:21,703 INFO L175 Difference]: Start difference. First operand has 289 places, 279 transitions, 640 flow. Second operand 7 states and 1702 transitions. [2022-11-16 12:52:21,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 325 transitions, 999 flow [2022-11-16 12:52:21,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 325 transitions, 974 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-11-16 12:52:21,719 INFO L231 Difference]: Finished difference. Result has 292 places, 280 transitions, 658 flow [2022-11-16 12:52:21,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=658, PETRI_PLACES=292, PETRI_TRANSITIONS=280} [2022-11-16 12:52:21,723 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 15 predicate places. [2022-11-16 12:52:21,724 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 280 transitions, 658 flow [2022-11-16 12:52:21,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:21,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:21,739 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:21,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:52:21,747 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)] === [2022-11-16 12:52:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash -597656803, now seen corresponding path program 6 times [2022-11-16 12:52:21,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756176490] [2022-11-16 12:52:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:21,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:22,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:22,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756176490] [2022-11-16 12:52:22,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756176490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:22,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:22,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:52:22,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747069261] [2022-11-16 12:52:22,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:22,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:22,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:22,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 310 [2022-11-16 12:52:22,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 280 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:22,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 310 [2022-11-16 12:52:22,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:23,897 INFO L130 PetriNetUnfolder]: 623/3279 cut-off events. [2022-11-16 12:52:23,898 INFO L131 PetriNetUnfolder]: For 1541/1541 co-relation queries the response was YES. [2022-11-16 12:52:23,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5065 conditions, 3279 events. 623/3279 cut-off events. For 1541/1541 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 31023 event pairs, 386 based on Foata normal form. 2/2891 useless extension candidates. Maximal degree in co-relation 5048. Up to 837 conditions per place. [2022-11-16 12:52:23,925 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 77 selfloop transitions, 2 changer transitions 18/313 dead transitions. [2022-11-16 12:52:23,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 313 transitions, 952 flow [2022-11-16 12:52:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1691 transitions. [2022-11-16 12:52:23,931 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7792626728110599 [2022-11-16 12:52:23,931 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1691 transitions. [2022-11-16 12:52:23,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1691 transitions. [2022-11-16 12:52:23,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:23,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1691 transitions. [2022-11-16 12:52:23,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 241.57142857142858) internal successors, (1691), 7 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,007 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,007 INFO L175 Difference]: Start difference. First operand has 292 places, 280 transitions, 658 flow. Second operand 7 states and 1691 transitions. [2022-11-16 12:52:24,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 313 transitions, 952 flow [2022-11-16 12:52:24,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 313 transitions, 932 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:24,022 INFO L231 Difference]: Finished difference. Result has 293 places, 279 transitions, 650 flow [2022-11-16 12:52:24,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=650, PETRI_PLACES=293, PETRI_TRANSITIONS=279} [2022-11-16 12:52:24,024 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 16 predicate places. [2022-11-16 12:52:24,025 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 279 transitions, 650 flow [2022-11-16 12:52:24,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:24,026 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:24,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:52:24,027 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)] === [2022-11-16 12:52:24,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1191732863, now seen corresponding path program 1 times [2022-11-16 12:52:24,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:24,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538992836] [2022-11-16 12:52:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:24,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:24,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:24,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538992836] [2022-11-16 12:52:24,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538992836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:24,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:24,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:24,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543173861] [2022-11-16 12:52:24,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:24,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:24,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 310 [2022-11-16 12:52:24,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 279 transitions, 650 flow. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:24,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 310 [2022-11-16 12:52:24,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:24,532 INFO L130 PetriNetUnfolder]: 137/1380 cut-off events. [2022-11-16 12:52:24,533 INFO L131 PetriNetUnfolder]: For 339/363 co-relation queries the response was YES. [2022-11-16 12:52:24,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 1380 events. 137/1380 cut-off events. For 339/363 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10340 event pairs, 54 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1775. Up to 144 conditions per place. [2022-11-16 12:52:24,542 INFO L137 encePairwiseOnDemand]: 307/310 looper letters, 12 selfloop transitions, 2 changer transitions 0/283 dead transitions. [2022-11-16 12:52:24,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 283 transitions, 689 flow [2022-11-16 12:52:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 870 transitions. [2022-11-16 12:52:24,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9354838709677419 [2022-11-16 12:52:24,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 870 transitions. [2022-11-16 12:52:24,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 870 transitions. [2022-11-16 12:52:24,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:24,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 870 transitions. [2022-11-16 12:52:24,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,555 INFO L175 Difference]: Start difference. First operand has 293 places, 279 transitions, 650 flow. Second operand 3 states and 870 transitions. [2022-11-16 12:52:24,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 283 transitions, 689 flow [2022-11-16 12:52:24,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 283 transitions, 677 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-16 12:52:24,564 INFO L231 Difference]: Finished difference. Result has 288 places, 279 transitions, 646 flow [2022-11-16 12:52:24,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=646, PETRI_PLACES=288, PETRI_TRANSITIONS=279} [2022-11-16 12:52:24,566 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 11 predicate places. [2022-11-16 12:52:24,567 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 279 transitions, 646 flow [2022-11-16 12:52:24,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:24,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:24,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:52:24,568 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)] === [2022-11-16 12:52:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:24,573 INFO L85 PathProgramCache]: Analyzing trace with hash -903579037, now seen corresponding path program 1 times [2022-11-16 12:52:24,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603696018] [2022-11-16 12:52:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:24,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:24,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603696018] [2022-11-16 12:52:24,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603696018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:24,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:24,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348003209] [2022-11-16 12:52:24,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:24,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:24,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:24,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 310 [2022-11-16 12:52:24,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 279 transitions, 646 flow. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:24,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 310 [2022-11-16 12:52:24,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:24,996 INFO L130 PetriNetUnfolder]: 61/1085 cut-off events. [2022-11-16 12:52:24,996 INFO L131 PetriNetUnfolder]: For 187/234 co-relation queries the response was YES. [2022-11-16 12:52:25,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 1085 events. 61/1085 cut-off events. For 187/234 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 7196 event pairs, 22 based on Foata normal form. 1/1009 useless extension candidates. Maximal degree in co-relation 1353. Up to 84 conditions per place. [2022-11-16 12:52:25,003 INFO L137 encePairwiseOnDemand]: 307/310 looper letters, 13 selfloop transitions, 2 changer transitions 0/284 dead transitions. [2022-11-16 12:52:25,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 284 transitions, 690 flow [2022-11-16 12:52:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 871 transitions. [2022-11-16 12:52:25,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9365591397849462 [2022-11-16 12:52:25,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 871 transitions. [2022-11-16 12:52:25,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 871 transitions. [2022-11-16 12:52:25,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:25,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 871 transitions. [2022-11-16 12:52:25,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,013 INFO L175 Difference]: Start difference. First operand has 288 places, 279 transitions, 646 flow. Second operand 3 states and 871 transitions. [2022-11-16 12:52:25,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 284 transitions, 690 flow [2022-11-16 12:52:25,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 284 transitions, 686 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:25,020 INFO L231 Difference]: Finished difference. Result has 289 places, 279 transitions, 650 flow [2022-11-16 12:52:25,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=650, PETRI_PLACES=289, PETRI_TRANSITIONS=279} [2022-11-16 12:52:25,022 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 12 predicate places. [2022-11-16 12:52:25,022 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 279 transitions, 650 flow [2022-11-16 12:52:25,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:25,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:25,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:52:25,024 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)] === [2022-11-16 12:52:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:25,024 INFO L85 PathProgramCache]: Analyzing trace with hash 257041073, now seen corresponding path program 1 times [2022-11-16 12:52:25,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:25,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725943090] [2022-11-16 12:52:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:25,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:25,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:25,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725943090] [2022-11-16 12:52:25,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725943090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:25,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:25,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:52:25,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981284161] [2022-11-16 12:52:25,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:25,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:25,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:25,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:25,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:25,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 279 transitions, 650 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:25,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:25,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:25,971 INFO L130 PetriNetUnfolder]: 346/3193 cut-off events. [2022-11-16 12:52:25,971 INFO L131 PetriNetUnfolder]: For 1203/1233 co-relation queries the response was YES. [2022-11-16 12:52:25,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4446 conditions, 3193 events. 346/3193 cut-off events. For 1203/1233 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 30782 event pairs, 95 based on Foata normal form. 4/2921 useless extension candidates. Maximal degree in co-relation 4430. Up to 237 conditions per place. [2022-11-16 12:52:25,995 INFO L137 encePairwiseOnDemand]: 306/310 looper letters, 38 selfloop transitions, 6 changer transitions 4/302 dead transitions. [2022-11-16 12:52:25,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 302 transitions, 847 flow [2022-11-16 12:52:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1141 transitions. [2022-11-16 12:52:25,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9201612903225806 [2022-11-16 12:52:25,999 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1141 transitions. [2022-11-16 12:52:26,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1141 transitions. [2022-11-16 12:52:26,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:26,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1141 transitions. [2022-11-16 12:52:26,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,007 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,007 INFO L175 Difference]: Start difference. First operand has 289 places, 279 transitions, 650 flow. Second operand 4 states and 1141 transitions. [2022-11-16 12:52:26,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 302 transitions, 847 flow [2022-11-16 12:52:26,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 302 transitions, 843 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:26,018 INFO L231 Difference]: Finished difference. Result has 293 places, 284 transitions, 705 flow [2022-11-16 12:52:26,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=705, PETRI_PLACES=293, PETRI_TRANSITIONS=284} [2022-11-16 12:52:26,020 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 16 predicate places. [2022-11-16 12:52:26,021 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 284 transitions, 705 flow [2022-11-16 12:52:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:26,022 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:26,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:52:26,022 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)] === [2022-11-16 12:52:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1563687629, now seen corresponding path program 2 times [2022-11-16 12:52:26,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:26,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882328534] [2022-11-16 12:52:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:26,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882328534] [2022-11-16 12:52:26,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882328534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:26,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:26,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:52:26,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908807733] [2022-11-16 12:52:26,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:26,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:26,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:26,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:26,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:26,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 284 transitions, 705 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:26,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:26,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:27,158 INFO L130 PetriNetUnfolder]: 393/3632 cut-off events. [2022-11-16 12:52:27,158 INFO L131 PetriNetUnfolder]: For 1595/1609 co-relation queries the response was YES. [2022-11-16 12:52:27,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5196 conditions, 3632 events. 393/3632 cut-off events. For 1595/1609 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 35652 event pairs, 112 based on Foata normal form. 2/3405 useless extension candidates. Maximal degree in co-relation 5178. Up to 297 conditions per place. [2022-11-16 12:52:27,195 INFO L137 encePairwiseOnDemand]: 307/310 looper letters, 43 selfloop transitions, 2 changer transitions 4/303 dead transitions. [2022-11-16 12:52:27,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 303 transitions, 917 flow [2022-11-16 12:52:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1133 transitions. [2022-11-16 12:52:27,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9137096774193548 [2022-11-16 12:52:27,200 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1133 transitions. [2022-11-16 12:52:27,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1133 transitions. [2022-11-16 12:52:27,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:27,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1133 transitions. [2022-11-16 12:52:27,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,208 INFO L175 Difference]: Start difference. First operand has 293 places, 284 transitions, 705 flow. Second operand 4 states and 1133 transitions. [2022-11-16 12:52:27,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 303 transitions, 917 flow [2022-11-16 12:52:27,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 303 transitions, 917 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:27,219 INFO L231 Difference]: Finished difference. Result has 298 places, 285 transitions, 726 flow [2022-11-16 12:52:27,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=726, PETRI_PLACES=298, PETRI_TRANSITIONS=285} [2022-11-16 12:52:27,221 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 21 predicate places. [2022-11-16 12:52:27,221 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 285 transitions, 726 flow [2022-11-16 12:52:27,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,222 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:27,222 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:27,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:52:27,223 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)] === [2022-11-16 12:52:27,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash -958899899, now seen corresponding path program 1 times [2022-11-16 12:52:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:27,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552894294] [2022-11-16 12:52:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:27,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:27,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552894294] [2022-11-16 12:52:27,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552894294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:27,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:27,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:52:27,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636954309] [2022-11-16 12:52:27,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:27,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:52:27,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:27,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:52:27,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:27,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:27,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 285 transitions, 726 flow. Second operand has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:27,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:27,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:28,498 INFO L130 PetriNetUnfolder]: 416/3935 cut-off events. [2022-11-16 12:52:28,498 INFO L131 PetriNetUnfolder]: For 2645/2713 co-relation queries the response was YES. [2022-11-16 12:52:28,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5882 conditions, 3935 events. 416/3935 cut-off events. For 2645/2713 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 39813 event pairs, 125 based on Foata normal form. 33/3706 useless extension candidates. Maximal degree in co-relation 5861. Up to 200 conditions per place. [2022-11-16 12:52:28,529 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 50 selfloop transitions, 13 changer transitions 9/326 dead transitions. [2022-11-16 12:52:28,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 326 transitions, 1121 flow [2022-11-16 12:52:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:52:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:52:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1708 transitions. [2022-11-16 12:52:28,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9182795698924732 [2022-11-16 12:52:28,535 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1708 transitions. [2022-11-16 12:52:28,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1708 transitions. [2022-11-16 12:52:28,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:28,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1708 transitions. [2022-11-16 12:52:28,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,547 INFO L175 Difference]: Start difference. First operand has 298 places, 285 transitions, 726 flow. Second operand 6 states and 1708 transitions. [2022-11-16 12:52:28,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 326 transitions, 1121 flow [2022-11-16 12:52:28,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 326 transitions, 1104 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:28,560 INFO L231 Difference]: Finished difference. Result has 305 places, 295 transitions, 870 flow [2022-11-16 12:52:28,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=870, PETRI_PLACES=305, PETRI_TRANSITIONS=295} [2022-11-16 12:52:28,562 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 28 predicate places. [2022-11-16 12:52:28,562 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 295 transitions, 870 flow [2022-11-16 12:52:28,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:28,563 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:28,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:52:28,564 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)] === [2022-11-16 12:52:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1332307067, now seen corresponding path program 2 times [2022-11-16 12:52:28,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:28,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302441483] [2022-11-16 12:52:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:28,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:28,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302441483] [2022-11-16 12:52:28,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302441483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:28,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:28,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:52:28,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558433006] [2022-11-16 12:52:28,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:28,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:52:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:28,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:52:28,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:28,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:28,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 295 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:28,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:28,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:29,578 INFO L130 PetriNetUnfolder]: 375/3608 cut-off events. [2022-11-16 12:52:29,579 INFO L131 PetriNetUnfolder]: For 3137/3205 co-relation queries the response was YES. [2022-11-16 12:52:29,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5834 conditions, 3608 events. 375/3608 cut-off events. For 3137/3205 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 36049 event pairs, 117 based on Foata normal form. 23/3372 useless extension candidates. Maximal degree in co-relation 5811. Up to 195 conditions per place. [2022-11-16 12:52:29,608 INFO L137 encePairwiseOnDemand]: 306/310 looper letters, 48 selfloop transitions, 10 changer transitions 17/329 dead transitions. [2022-11-16 12:52:29,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 329 transitions, 1253 flow [2022-11-16 12:52:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:52:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:52:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1698 transitions. [2022-11-16 12:52:29,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9129032258064517 [2022-11-16 12:52:29,614 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1698 transitions. [2022-11-16 12:52:29,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1698 transitions. [2022-11-16 12:52:29,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:29,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1698 transitions. [2022-11-16 12:52:29,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,625 INFO L175 Difference]: Start difference. First operand has 305 places, 295 transitions, 870 flow. Second operand 6 states and 1698 transitions. [2022-11-16 12:52:29,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 329 transitions, 1253 flow [2022-11-16 12:52:29,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 329 transitions, 1234 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:29,641 INFO L231 Difference]: Finished difference. Result has 311 places, 294 transitions, 875 flow [2022-11-16 12:52:29,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=875, PETRI_PLACES=311, PETRI_TRANSITIONS=294} [2022-11-16 12:52:29,642 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 34 predicate places. [2022-11-16 12:52:29,643 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 294 transitions, 875 flow [2022-11-16 12:52:29,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:29,644 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:29,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:52:29,644 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)] === [2022-11-16 12:52:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1241034875, now seen corresponding path program 3 times [2022-11-16 12:52:29,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:29,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754108794] [2022-11-16 12:52:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:29,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:29,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754108794] [2022-11-16 12:52:29,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754108794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:29,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:29,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:52:29,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709399071] [2022-11-16 12:52:29,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:29,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:29,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:29,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:29,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:29,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 294 transitions, 875 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:29,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:29,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:30,474 INFO L130 PetriNetUnfolder]: 256/2541 cut-off events. [2022-11-16 12:52:30,474 INFO L131 PetriNetUnfolder]: For 2406/2443 co-relation queries the response was YES. [2022-11-16 12:52:30,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 2541 events. 256/2541 cut-off events. For 2406/2443 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 23281 event pairs, 125 based on Foata normal form. 4/2358 useless extension candidates. Maximal degree in co-relation 4180. Up to 301 conditions per place. [2022-11-16 12:52:30,489 INFO L137 encePairwiseOnDemand]: 306/310 looper letters, 46 selfloop transitions, 9 changer transitions 1/310 dead transitions. [2022-11-16 12:52:30,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 310 transitions, 1072 flow [2022-11-16 12:52:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1138 transitions. [2022-11-16 12:52:30,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.917741935483871 [2022-11-16 12:52:30,497 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1138 transitions. [2022-11-16 12:52:30,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1138 transitions. [2022-11-16 12:52:30,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:30,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1138 transitions. [2022-11-16 12:52:30,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.5) internal successors, (1138), 4 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:30,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:30,506 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:30,506 INFO L175 Difference]: Start difference. First operand has 311 places, 294 transitions, 875 flow. Second operand 4 states and 1138 transitions. [2022-11-16 12:52:30,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 310 transitions, 1072 flow [2022-11-16 12:52:30,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 310 transitions, 1056 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:30,521 INFO L231 Difference]: Finished difference. Result has 313 places, 296 transitions, 915 flow [2022-11-16 12:52:30,522 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=915, PETRI_PLACES=313, PETRI_TRANSITIONS=296} [2022-11-16 12:52:30,522 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 36 predicate places. [2022-11-16 12:52:30,523 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 296 transitions, 915 flow [2022-11-16 12:52:30,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:30,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:30,524 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:30,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:52:30,524 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)] === [2022-11-16 12:52:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1156561989, now seen corresponding path program 3 times [2022-11-16 12:52:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:30,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345877582] [2022-11-16 12:52:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:30,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:30,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:30,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345877582] [2022-11-16 12:52:30,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345877582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:30,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:30,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:52:30,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396312585] [2022-11-16 12:52:30,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:30,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:52:30,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:30,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:52:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:30,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:30,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 296 transitions, 915 flow. Second operand has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:30,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:30,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:30,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:31,470 INFO L130 PetriNetUnfolder]: 286/3039 cut-off events. [2022-11-16 12:52:31,470 INFO L131 PetriNetUnfolder]: For 2537/2618 co-relation queries the response was YES. [2022-11-16 12:52:31,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4664 conditions, 3039 events. 286/3039 cut-off events. For 2537/2618 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 28770 event pairs, 55 based on Foata normal form. 11/2845 useless extension candidates. Maximal degree in co-relation 4637. Up to 171 conditions per place. [2022-11-16 12:52:31,492 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 49 selfloop transitions, 15 changer transitions 7/325 dead transitions. [2022-11-16 12:52:31,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 325 transitions, 1195 flow [2022-11-16 12:52:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:52:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:52:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1702 transitions. [2022-11-16 12:52:31,498 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9150537634408602 [2022-11-16 12:52:31,499 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1702 transitions. [2022-11-16 12:52:31,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1702 transitions. [2022-11-16 12:52:31,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:31,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1702 transitions. [2022-11-16 12:52:31,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.6666666666667) internal successors, (1702), 6 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,510 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,510 INFO L175 Difference]: Start difference. First operand has 313 places, 296 transitions, 915 flow. Second operand 6 states and 1702 transitions. [2022-11-16 12:52:31,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 325 transitions, 1195 flow [2022-11-16 12:52:31,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 325 transitions, 1189 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:31,527 INFO L231 Difference]: Finished difference. Result has 318 places, 301 transitions, 999 flow [2022-11-16 12:52:31,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=999, PETRI_PLACES=318, PETRI_TRANSITIONS=301} [2022-11-16 12:52:31,528 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 41 predicate places. [2022-11-16 12:52:31,528 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 301 transitions, 999 flow [2022-11-16 12:52:31,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,529 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:31,530 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:31,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:52:31,530 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)] === [2022-11-16 12:52:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash -875212239, now seen corresponding path program 4 times [2022-11-16 12:52:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:31,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677281435] [2022-11-16 12:52:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:31,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:31,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:31,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677281435] [2022-11-16 12:52:31,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677281435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:31,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:31,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:52:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484195647] [2022-11-16 12:52:31,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:31,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:31,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:31,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 301 transitions, 999 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:31,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:31,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:32,354 INFO L130 PetriNetUnfolder]: 268/2905 cut-off events. [2022-11-16 12:52:32,355 INFO L131 PetriNetUnfolder]: For 2767/2834 co-relation queries the response was YES. [2022-11-16 12:52:32,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4524 conditions, 2905 events. 268/2905 cut-off events. For 2767/2834 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 26954 event pairs, 74 based on Foata normal form. 10/2718 useless extension candidates. Maximal degree in co-relation 4495. Up to 245 conditions per place. [2022-11-16 12:52:32,373 INFO L137 encePairwiseOnDemand]: 306/310 looper letters, 50 selfloop transitions, 10 changer transitions 4/318 dead transitions. [2022-11-16 12:52:32,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 318 transitions, 1237 flow [2022-11-16 12:52:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1139 transitions. [2022-11-16 12:52:32,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9185483870967742 [2022-11-16 12:52:32,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1139 transitions. [2022-11-16 12:52:32,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1139 transitions. [2022-11-16 12:52:32,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:32,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1139 transitions. [2022-11-16 12:52:32,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,386 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,386 INFO L175 Difference]: Start difference. First operand has 318 places, 301 transitions, 999 flow. Second operand 4 states and 1139 transitions. [2022-11-16 12:52:32,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 318 transitions, 1237 flow [2022-11-16 12:52:32,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 318 transitions, 1216 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:32,403 INFO L231 Difference]: Finished difference. Result has 322 places, 303 transitions, 1036 flow [2022-11-16 12:52:32,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1036, PETRI_PLACES=322, PETRI_TRANSITIONS=303} [2022-11-16 12:52:32,405 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 45 predicate places. [2022-11-16 12:52:32,405 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 303 transitions, 1036 flow [2022-11-16 12:52:32,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:32,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:32,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:52:32,406 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)] === [2022-11-16 12:52:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash -782087287, now seen corresponding path program 5 times [2022-11-16 12:52:32,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:32,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288701496] [2022-11-16 12:52:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:32,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:32,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288701496] [2022-11-16 12:52:32,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288701496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:32,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:32,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:52:32,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302248563] [2022-11-16 12:52:32,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:32,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:52:32,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:52:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:32,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:32,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 303 transitions, 1036 flow. Second operand has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:32,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:32,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:33,185 INFO L130 PetriNetUnfolder]: 231/2339 cut-off events. [2022-11-16 12:52:33,186 INFO L131 PetriNetUnfolder]: For 2681/2697 co-relation queries the response was YES. [2022-11-16 12:52:33,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3841 conditions, 2339 events. 231/2339 cut-off events. For 2681/2697 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 20206 event pairs, 66 based on Foata normal form. 12/2184 useless extension candidates. Maximal degree in co-relation 3811. Up to 130 conditions per place. [2022-11-16 12:52:33,205 INFO L137 encePairwiseOnDemand]: 304/310 looper letters, 47 selfloop transitions, 13 changer transitions 20/334 dead transitions. [2022-11-16 12:52:33,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 334 transitions, 1375 flow [2022-11-16 12:52:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:52:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:52:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1704 transitions. [2022-11-16 12:52:33,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9161290322580645 [2022-11-16 12:52:33,211 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1704 transitions. [2022-11-16 12:52:33,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1704 transitions. [2022-11-16 12:52:33,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:33,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1704 transitions. [2022-11-16 12:52:33,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,222 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,222 INFO L175 Difference]: Start difference. First operand has 322 places, 303 transitions, 1036 flow. Second operand 6 states and 1704 transitions. [2022-11-16 12:52:33,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 334 transitions, 1375 flow [2022-11-16 12:52:33,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 334 transitions, 1373 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:33,240 INFO L231 Difference]: Finished difference. Result has 330 places, 303 transitions, 1076 flow [2022-11-16 12:52:33,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1076, PETRI_PLACES=330, PETRI_TRANSITIONS=303} [2022-11-16 12:52:33,241 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 53 predicate places. [2022-11-16 12:52:33,242 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 303 transitions, 1076 flow [2022-11-16 12:52:33,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:33,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:52:33,243 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)] === [2022-11-16 12:52:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash 709630223, now seen corresponding path program 4 times [2022-11-16 12:52:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:33,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915259637] [2022-11-16 12:52:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:33,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:33,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915259637] [2022-11-16 12:52:33,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915259637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:33,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:33,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:52:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843938795] [2022-11-16 12:52:33,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:33,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:33,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:33,417 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:33,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 303 transitions, 1076 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:33,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:33,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:33,821 INFO L130 PetriNetUnfolder]: 166/1708 cut-off events. [2022-11-16 12:52:33,822 INFO L131 PetriNetUnfolder]: For 2302/2363 co-relation queries the response was YES. [2022-11-16 12:52:33,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2882 conditions, 1708 events. 166/1708 cut-off events. For 2302/2363 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 12741 event pairs, 58 based on Foata normal form. 4/1589 useless extension candidates. Maximal degree in co-relation 2848. Up to 128 conditions per place. [2022-11-16 12:52:33,838 INFO L137 encePairwiseOnDemand]: 306/310 looper letters, 44 selfloop transitions, 10 changer transitions 9/317 dead transitions. [2022-11-16 12:52:33,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 317 transitions, 1236 flow [2022-11-16 12:52:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:52:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:52:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1413 transitions. [2022-11-16 12:52:33,849 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9116129032258065 [2022-11-16 12:52:33,849 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1413 transitions. [2022-11-16 12:52:33,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1413 transitions. [2022-11-16 12:52:33,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:33,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1413 transitions. [2022-11-16 12:52:33,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 282.6) internal successors, (1413), 5 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,861 INFO L175 Difference]: Start difference. First operand has 330 places, 303 transitions, 1076 flow. Second operand 5 states and 1413 transitions. [2022-11-16 12:52:33,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 317 transitions, 1236 flow [2022-11-16 12:52:33,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 317 transitions, 1227 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:33,879 INFO L231 Difference]: Finished difference. Result has 329 places, 299 transitions, 1016 flow [2022-11-16 12:52:33,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1016, PETRI_PLACES=329, PETRI_TRANSITIONS=299} [2022-11-16 12:52:33,880 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 52 predicate places. [2022-11-16 12:52:33,880 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 299 transitions, 1016 flow [2022-11-16 12:52:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:33,881 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 12:52:33,882 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)] === [2022-11-16 12:52:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2024376525, now seen corresponding path program 5 times [2022-11-16 12:52:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:33,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469265121] [2022-11-16 12:52:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:34,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469265121] [2022-11-16 12:52:34,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469265121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:34,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:34,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:52:34,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243005723] [2022-11-16 12:52:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:34,126 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 310 [2022-11-16 12:52:34,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 299 transitions, 1016 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:34,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 310 [2022-11-16 12:52:34,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:34,525 INFO L130 PetriNetUnfolder]: 135/1306 cut-off events. [2022-11-16 12:52:34,525 INFO L131 PetriNetUnfolder]: For 2077/2085 co-relation queries the response was YES. [2022-11-16 12:52:34,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1306 events. 135/1306 cut-off events. For 2077/2085 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 8639 event pairs, 55 based on Foata normal form. 6/1214 useless extension candidates. Maximal degree in co-relation 2316. Up to 128 conditions per place. [2022-11-16 12:52:34,536 INFO L137 encePairwiseOnDemand]: 306/310 looper letters, 42 selfloop transitions, 7 changer transitions 2/305 dead transitions. [2022-11-16 12:52:34,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 305 transitions, 1119 flow [2022-11-16 12:52:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1135 transitions. [2022-11-16 12:52:34,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9153225806451613 [2022-11-16 12:52:34,541 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1135 transitions. [2022-11-16 12:52:34,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1135 transitions. [2022-11-16 12:52:34,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:34,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1135 transitions. [2022-11-16 12:52:34,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.75) internal successors, (1135), 4 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,551 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,552 INFO L175 Difference]: Start difference. First operand has 329 places, 299 transitions, 1016 flow. Second operand 4 states and 1135 transitions. [2022-11-16 12:52:34,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 305 transitions, 1119 flow [2022-11-16 12:52:34,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 305 transitions, 1115 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:34,570 INFO L231 Difference]: Finished difference. Result has 331 places, 298 transitions, 1005 flow [2022-11-16 12:52:34,570 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1005, PETRI_PLACES=331, PETRI_TRANSITIONS=298} [2022-11-16 12:52:34,571 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 54 predicate places. [2022-11-16 12:52:34,571 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 298 transitions, 1005 flow [2022-11-16 12:52:34,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:34,573 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:34,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 12:52:34,573 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)] === [2022-11-16 12:52:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:34,574 INFO L85 PathProgramCache]: Analyzing trace with hash -827103135, now seen corresponding path program 1 times [2022-11-16 12:52:34,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:34,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042660031] [2022-11-16 12:52:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:34,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:36,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:36,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042660031] [2022-11-16 12:52:36,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042660031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:36,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:36,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-11-16 12:52:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324689598] [2022-11-16 12:52:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:36,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:52:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:52:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:52:36,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 310 [2022-11-16 12:52:36,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 298 transitions, 1005 flow. Second operand has 28 states, 28 states have (on average 197.53571428571428) internal successors, (5531), 28 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:36,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:36,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 310 [2022-11-16 12:52:36,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:48,090 INFO L130 PetriNetUnfolder]: 6934/28562 cut-off events. [2022-11-16 12:52:48,090 INFO L131 PetriNetUnfolder]: For 9606/9971 co-relation queries the response was YES. [2022-11-16 12:52:48,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45298 conditions, 28562 events. 6934/28562 cut-off events. For 9606/9971 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 394660 event pairs, 4159 based on Foata normal form. 48/24679 useless extension candidates. Maximal degree in co-relation 45264. Up to 2219 conditions per place. [2022-11-16 12:52:48,289 INFO L137 encePairwiseOnDemand]: 271/310 looper letters, 276 selfloop transitions, 43 changer transitions 19/541 dead transitions. [2022-11-16 12:52:48,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 541 transitions, 2406 flow [2022-11-16 12:52:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 12:52:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-16 12:52:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 8709 transitions. [2022-11-16 12:52:48,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6533383345836459 [2022-11-16 12:52:48,307 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 8709 transitions. [2022-11-16 12:52:48,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 8709 transitions. [2022-11-16 12:52:48,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:48,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 8709 transitions. [2022-11-16 12:52:48,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 202.53488372093022) internal successors, (8709), 43 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:48,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 310.0) internal successors, (13640), 44 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:48,357 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 310.0) internal successors, (13640), 44 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:48,357 INFO L175 Difference]: Start difference. First operand has 331 places, 298 transitions, 1005 flow. Second operand 43 states and 8709 transitions. [2022-11-16 12:52:48,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 541 transitions, 2406 flow [2022-11-16 12:52:48,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 541 transitions, 2388 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:48,443 INFO L231 Difference]: Finished difference. Result has 390 places, 328 transitions, 1221 flow [2022-11-16 12:52:48,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1221, PETRI_PLACES=390, PETRI_TRANSITIONS=328} [2022-11-16 12:52:48,444 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 113 predicate places. [2022-11-16 12:52:48,444 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 328 transitions, 1221 flow [2022-11-16 12:52:48,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 197.53571428571428) internal successors, (5531), 28 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:48,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:48,447 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 12:52:48,447 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)] === [2022-11-16 12:52:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1244752383, now seen corresponding path program 2 times [2022-11-16 12:52:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:48,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739312589] [2022-11-16 12:52:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:50,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:50,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739312589] [2022-11-16 12:52:50,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739312589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:50,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:50,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-16 12:52:50,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854637989] [2022-11-16 12:52:50,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:50,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:52:50,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:52:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:52:50,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 310 [2022-11-16 12:52:50,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 328 transitions, 1221 flow. Second operand has 24 states, 24 states have (on average 200.91666666666666) internal successors, (4822), 24 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:50,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:50,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 310 [2022-11-16 12:52:50,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:59,308 INFO L130 PetriNetUnfolder]: 5555/24615 cut-off events. [2022-11-16 12:52:59,308 INFO L131 PetriNetUnfolder]: For 10737/11140 co-relation queries the response was YES. [2022-11-16 12:52:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40770 conditions, 24615 events. 5555/24615 cut-off events. For 10737/11140 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 338244 event pairs, 3339 based on Foata normal form. 50/21205 useless extension candidates. Maximal degree in co-relation 40717. Up to 1808 conditions per place. [2022-11-16 12:52:59,563 INFO L137 encePairwiseOnDemand]: 275/310 looper letters, 259 selfloop transitions, 42 changer transitions 16/523 dead transitions. [2022-11-16 12:52:59,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 523 transitions, 2561 flow [2022-11-16 12:52:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:52:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-16 12:52:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 8026 transitions. [2022-11-16 12:52:59,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6638544251447477 [2022-11-16 12:52:59,583 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 8026 transitions. [2022-11-16 12:52:59,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 8026 transitions. [2022-11-16 12:52:59,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:59,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 8026 transitions. [2022-11-16 12:52:59,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 205.7948717948718) internal successors, (8026), 39 states have internal predecessors, (8026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:59,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 310.0) internal successors, (12400), 40 states have internal predecessors, (12400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:59,634 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 310.0) internal successors, (12400), 40 states have internal predecessors, (12400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:59,635 INFO L175 Difference]: Start difference. First operand has 390 places, 328 transitions, 1221 flow. Second operand 39 states and 8026 transitions. [2022-11-16 12:52:59,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 523 transitions, 2561 flow [2022-11-16 12:52:59,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 523 transitions, 2440 flow, removed 52 selfloop flow, removed 13 redundant places. [2022-11-16 12:52:59,745 INFO L231 Difference]: Finished difference. Result has 413 places, 330 transitions, 1299 flow [2022-11-16 12:52:59,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1299, PETRI_PLACES=413, PETRI_TRANSITIONS=330} [2022-11-16 12:52:59,746 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 136 predicate places. [2022-11-16 12:52:59,747 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 330 transitions, 1299 flow [2022-11-16 12:52:59,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 200.91666666666666) internal successors, (4822), 24 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:59,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:59,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:59,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 12:52:59,749 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)] === [2022-11-16 12:52:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1768874753, now seen corresponding path program 3 times [2022-11-16 12:52:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:59,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700222394] [2022-11-16 12:52:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:01,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700222394] [2022-11-16 12:53:01,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700222394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:01,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:01,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-16 12:53:01,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534738139] [2022-11-16 12:53:01,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:01,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:53:01,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:53:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:53:01,771 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 310 [2022-11-16 12:53:01,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 330 transitions, 1299 flow. Second operand has 27 states, 27 states have (on average 200.59259259259258) internal successors, (5416), 27 states have internal predecessors, (5416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:01,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:01,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 310 [2022-11-16 12:53:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:11,234 INFO L130 PetriNetUnfolder]: 5626/25175 cut-off events. [2022-11-16 12:53:11,234 INFO L131 PetriNetUnfolder]: For 13525/13933 co-relation queries the response was YES. [2022-11-16 12:53:11,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43012 conditions, 25175 events. 5626/25175 cut-off events. For 13525/13933 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 348501 event pairs, 3365 based on Foata normal form. 49/21729 useless extension candidates. Maximal degree in co-relation 42960. Up to 1807 conditions per place. [2022-11-16 12:53:11,471 INFO L137 encePairwiseOnDemand]: 273/310 looper letters, 258 selfloop transitions, 46 changer transitions 14/524 dead transitions. [2022-11-16 12:53:11,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 524 transitions, 2594 flow [2022-11-16 12:53:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:53:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-16 12:53:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 8423 transitions. [2022-11-16 12:53:11,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6627065302911094 [2022-11-16 12:53:11,486 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 8423 transitions. [2022-11-16 12:53:11,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 8423 transitions. [2022-11-16 12:53:11,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:11,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 8423 transitions. [2022-11-16 12:53:11,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 205.4390243902439) internal successors, (8423), 41 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:11,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 310.0) internal successors, (13020), 42 states have internal predecessors, (13020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:11,521 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 310.0) internal successors, (13020), 42 states have internal predecessors, (13020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:11,521 INFO L175 Difference]: Start difference. First operand has 413 places, 330 transitions, 1299 flow. Second operand 41 states and 8423 transitions. [2022-11-16 12:53:11,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 524 transitions, 2594 flow [2022-11-16 12:53:11,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 524 transitions, 2470 flow, removed 18 selfloop flow, removed 36 redundant places. [2022-11-16 12:53:11,630 INFO L231 Difference]: Finished difference. Result has 420 places, 332 transitions, 1336 flow [2022-11-16 12:53:11,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1336, PETRI_PLACES=420, PETRI_TRANSITIONS=332} [2022-11-16 12:53:11,631 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 143 predicate places. [2022-11-16 12:53:11,631 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 332 transitions, 1336 flow [2022-11-16 12:53:11,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 200.59259259259258) internal successors, (5416), 27 states have internal predecessors, (5416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:11,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:11,633 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:11,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 12:53:11,633 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)] === [2022-11-16 12:53:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:11,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1257787707, now seen corresponding path program 1 times [2022-11-16 12:53:11,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:11,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256852288] [2022-11-16 12:53:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:11,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:12,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:12,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256852288] [2022-11-16 12:53:12,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256852288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:12,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597475435] [2022-11-16 12:53:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:12,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:12,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:12,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:12,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:53:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:53:12,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:14,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:16,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597475435] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:16,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:16,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19, 18] total 36 [2022-11-16 12:53:16,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741693899] [2022-11-16 12:53:16,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:16,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:53:16,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:53:16,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:53:16,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 310 [2022-11-16 12:53:16,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 332 transitions, 1336 flow. Second operand has 18 states, 18 states have (on average 202.11111111111111) internal successors, (3638), 18 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:16,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:16,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 310 [2022-11-16 12:53:16,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:23,985 INFO L130 PetriNetUnfolder]: 5627/25425 cut-off events. [2022-11-16 12:53:23,985 INFO L131 PetriNetUnfolder]: For 16158/16558 co-relation queries the response was YES. [2022-11-16 12:53:24,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44055 conditions, 25425 events. 5627/25425 cut-off events. For 16158/16558 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 352766 event pairs, 3466 based on Foata normal form. 53/21972 useless extension candidates. Maximal degree in co-relation 44002. Up to 3541 conditions per place. [2022-11-16 12:53:24,228 INFO L137 encePairwiseOnDemand]: 282/310 looper letters, 221 selfloop transitions, 44 changer transitions 15/486 dead transitions. [2022-11-16 12:53:24,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 486 transitions, 2415 flow [2022-11-16 12:53:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:53:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-16 12:53:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6203 transitions. [2022-11-16 12:53:24,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.666989247311828 [2022-11-16 12:53:24,238 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6203 transitions. [2022-11-16 12:53:24,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6203 transitions. [2022-11-16 12:53:24,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:24,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6203 transitions. [2022-11-16 12:53:24,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 206.76666666666668) internal successors, (6203), 30 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:24,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 310.0) internal successors, (9610), 31 states have internal predecessors, (9610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:24,263 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 310.0) internal successors, (9610), 31 states have internal predecessors, (9610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:24,264 INFO L175 Difference]: Start difference. First operand has 420 places, 332 transitions, 1336 flow. Second operand 30 states and 6203 transitions. [2022-11-16 12:53:24,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 486 transitions, 2415 flow [2022-11-16 12:53:24,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 486 transitions, 2309 flow, removed 12 selfloop flow, removed 36 redundant places. [2022-11-16 12:53:24,379 INFO L231 Difference]: Finished difference. Result has 416 places, 346 transitions, 1415 flow [2022-11-16 12:53:24,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1415, PETRI_PLACES=416, PETRI_TRANSITIONS=346} [2022-11-16 12:53:24,381 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 139 predicate places. [2022-11-16 12:53:24,381 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 346 transitions, 1415 flow [2022-11-16 12:53:24,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 202.11111111111111) internal successors, (3638), 18 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:24,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:24,382 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:24,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:53:24,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:53:24,583 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)] === [2022-11-16 12:53:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1960496699, now seen corresponding path program 2 times [2022-11-16 12:53:24,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:24,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251683033] [2022-11-16 12:53:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:24,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251683033] [2022-11-16 12:53:25,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251683033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626506669] [2022-11-16 12:53:25,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:53:25,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:25,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:25,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:53:25,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:53:25,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:53:25,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:53:27,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:27,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626506669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:27,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:53:27,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [19] total 34 [2022-11-16 12:53:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353537412] [2022-11-16 12:53:27,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:27,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:53:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:53:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:53:27,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 310 [2022-11-16 12:53:27,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 346 transitions, 1415 flow. Second operand has 19 states, 19 states have (on average 198.94736842105263) internal successors, (3780), 19 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:27,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:27,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 310 [2022-11-16 12:53:27,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:38,699 INFO L130 PetriNetUnfolder]: 8322/35283 cut-off events. [2022-11-16 12:53:38,699 INFO L131 PetriNetUnfolder]: For 28376/28799 co-relation queries the response was YES. [2022-11-16 12:53:38,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64603 conditions, 35283 events. 8322/35283 cut-off events. For 28376/28799 co-relation queries the response was YES. Maximal size of possible extension queue 1391. Compared 506834 event pairs, 4494 based on Foata normal form. 58/30672 useless extension candidates. Maximal degree in co-relation 64547. Up to 6483 conditions per place. [2022-11-16 12:53:39,085 INFO L137 encePairwiseOnDemand]: 283/310 looper letters, 181 selfloop transitions, 45 changer transitions 16/445 dead transitions. [2022-11-16 12:53:39,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 445 transitions, 2293 flow [2022-11-16 12:53:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:53:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 12:53:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5645 transitions. [2022-11-16 12:53:39,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6503456221198156 [2022-11-16 12:53:39,096 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5645 transitions. [2022-11-16 12:53:39,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5645 transitions. [2022-11-16 12:53:39,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:39,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5645 transitions. [2022-11-16 12:53:39,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 201.60714285714286) internal successors, (5645), 28 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:39,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 310.0) internal successors, (8990), 29 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:39,126 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 310.0) internal successors, (8990), 29 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:39,127 INFO L175 Difference]: Start difference. First operand has 416 places, 346 transitions, 1415 flow. Second operand 28 states and 5645 transitions. [2022-11-16 12:53:39,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 445 transitions, 2293 flow [2022-11-16 12:53:39,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 445 transitions, 2195 flow, removed 34 selfloop flow, removed 14 redundant places. [2022-11-16 12:53:39,822 INFO L231 Difference]: Finished difference. Result has 440 places, 367 transitions, 1607 flow [2022-11-16 12:53:39,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1607, PETRI_PLACES=440, PETRI_TRANSITIONS=367} [2022-11-16 12:53:39,823 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 163 predicate places. [2022-11-16 12:53:39,823 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 367 transitions, 1607 flow [2022-11-16 12:53:39,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 198.94736842105263) internal successors, (3780), 19 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:39,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:39,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:39,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:40,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:53:40,032 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)] === [2022-11-16 12:53:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:40,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2020180013, now seen corresponding path program 1 times [2022-11-16 12:53:40,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:40,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968547540] [2022-11-16 12:53:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:40,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968547540] [2022-11-16 12:53:40,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968547540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605584660] [2022-11-16 12:53:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:40,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:40,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:40,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:40,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:53:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:53:40,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:41,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:41,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605584660] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:41,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:41,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 26 [2022-11-16 12:53:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924725750] [2022-11-16 12:53:41,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:41,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:53:41,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:41,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:53:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:53:42,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 310 [2022-11-16 12:53:42,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 367 transitions, 1607 flow. Second operand has 13 states, 13 states have (on average 208.46153846153845) internal successors, (2710), 13 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:42,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:42,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 310 [2022-11-16 12:53:42,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:50,004 INFO L130 PetriNetUnfolder]: 5605/26963 cut-off events. [2022-11-16 12:53:50,004 INFO L131 PetriNetUnfolder]: For 32966/33683 co-relation queries the response was YES. [2022-11-16 12:53:50,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51608 conditions, 26963 events. 5605/26963 cut-off events. For 32966/33683 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 381164 event pairs, 2213 based on Foata normal form. 62/23842 useless extension candidates. Maximal degree in co-relation 51540. Up to 4489 conditions per place. [2022-11-16 12:53:50,304 INFO L137 encePairwiseOnDemand]: 287/310 looper letters, 169 selfloop transitions, 46 changer transitions 56/483 dead transitions. [2022-11-16 12:53:50,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 483 transitions, 2645 flow [2022-11-16 12:53:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:53:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 12:53:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4281 transitions. [2022-11-16 12:53:50,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6904838709677419 [2022-11-16 12:53:50,310 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4281 transitions. [2022-11-16 12:53:50,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4281 transitions. [2022-11-16 12:53:50,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:50,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4281 transitions. [2022-11-16 12:53:50,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 214.05) internal successors, (4281), 20 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:50,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 310.0) internal successors, (6510), 21 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:50,328 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 310.0) internal successors, (6510), 21 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:50,329 INFO L175 Difference]: Start difference. First operand has 440 places, 367 transitions, 1607 flow. Second operand 20 states and 4281 transitions. [2022-11-16 12:53:50,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 483 transitions, 2645 flow [2022-11-16 12:53:50,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 483 transitions, 2607 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-11-16 12:53:50,554 INFO L231 Difference]: Finished difference. Result has 449 places, 364 transitions, 1659 flow [2022-11-16 12:53:50,555 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1659, PETRI_PLACES=449, PETRI_TRANSITIONS=364} [2022-11-16 12:53:50,556 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 172 predicate places. [2022-11-16 12:53:50,557 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 364 transitions, 1659 flow [2022-11-16 12:53:50,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 208.46153846153845) internal successors, (2710), 13 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:50,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:50,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:50,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:50,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:53:50,766 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)] === [2022-11-16 12:53:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash -311825677, now seen corresponding path program 1 times [2022-11-16 12:53:50,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:50,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057896982] [2022-11-16 12:53:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:50,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:51,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:51,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057896982] [2022-11-16 12:53:51,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057896982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:51,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034524183] [2022-11-16 12:53:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:51,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:51,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:51,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2af740f-ee91-4f78-bb88-ce9642462ea4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:53:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:51,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:53:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:52,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:52,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034524183] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:52,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:52,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 26 [2022-11-16 12:53:52,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068744852] [2022-11-16 12:53:52,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:53:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:53:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:53:52,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 310 [2022-11-16 12:53:52,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 364 transitions, 1659 flow. Second operand has 13 states, 13 states have (on average 208.46153846153845) internal successors, (2710), 13 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:52,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:52,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 310 [2022-11-16 12:53:52,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand