./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 38b53e6a 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_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-38b53e6 [2022-11-25 15:37:55,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:37:55,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:37:55,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:37:55,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:37:55,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:37:55,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:37:55,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:37:55,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:37:55,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:37:55,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:37:55,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:37:55,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:37:55,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:37:55,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:37:55,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:37:55,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:37:55,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:37:55,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:37:55,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:37:55,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:37:55,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:37:55,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:37:55,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:37:55,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:37:55,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:37:55,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:37:55,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:37:55,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:37:55,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:37:55,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:37:55,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:37:55,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:37:55,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:37:55,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:37:55,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:37:55,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:37:55,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:37:55,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:37:55,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:37:55,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:37:55,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:37:55,923 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:37:55,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:37:55,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:37:55,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:37:55,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:37:55,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:37:55,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:37:55,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:37:55,926 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:37:55,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:37:55,927 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:37:55,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:37:55,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:37:55,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:37:55,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:37:55,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:37:55,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:37:55,928 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:37:55,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:37:55,928 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:37:55,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:37:55,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:37:55,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:37:55,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:37:55,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:37:55,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:37:55,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:37:55,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:37:55,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:37:55,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:37:55,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:37:55,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:37:55,931 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:37:55,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:37:55,932 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-11-25 15:37:56,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:37:56,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:37:56,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:37:56,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:37:56,229 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:37:56,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-25 15:37:59,219 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:37:59,520 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:37:59,520 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-25 15:37:59,527 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/data/ab05a572b/6a09343f2a0d46d69f4dc1a9787e16b8/FLAG8f31a0a18 [2022-11-25 15:37:59,543 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/data/ab05a572b/6a09343f2a0d46d69f4dc1a9787e16b8 [2022-11-25 15:37:59,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:37:59,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:37:59,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:37:59,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:37:59,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:37:59,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f388ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59, skipping insertion in model container [2022-11-25 15:37:59,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:37:59,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:37:59,760 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-25 15:37:59,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:37:59,778 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:37:59,807 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-25 15:37:59,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:37:59,844 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:37:59,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59 WrapperNode [2022-11-25 15:37:59,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:37:59,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:37:59,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:37:59,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:37:59,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,923 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 176 [2022-11-25 15:37:59,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:37:59,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:37:59,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:37:59,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:37:59,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:37:59,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:37:59,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:37:59,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:37:59,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (1/1) ... [2022-11-25 15:37:59,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:37:59,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:00,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:38:00,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:38:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:38:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:38:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:38:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:38:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:38:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:38:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:38:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:38:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 15:38:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 15:38:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:38:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:38:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:38:00,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:38:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:38:00,067 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:38:00,184 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:38:00,186 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:38:00,727 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:38:00,741 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:38:00,741 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 15:38:00,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:38:00 BoogieIcfgContainer [2022-11-25 15:38:00,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:38:00,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:38:00,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:38:00,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:38:00,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:37:59" (1/3) ... [2022-11-25 15:38:00,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461d5543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:38:00, skipping insertion in model container [2022-11-25 15:38:00,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:59" (2/3) ... [2022-11-25 15:38:00,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461d5543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:38:00, skipping insertion in model container [2022-11-25 15:38:00,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:38:00" (3/3) ... [2022-11-25 15:38:00,754 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2022-11-25 15:38:00,779 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:38:00,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:38:00,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:38:00,791 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:38:01,015 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 15:38:01,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 310 transitions, 644 flow [2022-11-25 15:38:01,278 INFO L130 PetriNetUnfolder]: 29/307 cut-off events. [2022-11-25 15:38:01,279 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:38:01,289 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. [2022-11-25 15:38:01,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 310 transitions, 644 flow [2022-11-25 15:38:01,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 296 transitions, 610 flow [2022-11-25 15:38:01,302 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:38:01,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 296 transitions, 610 flow [2022-11-25 15:38:01,333 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 296 transitions, 610 flow [2022-11-25 15:38:01,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 296 transitions, 610 flow [2022-11-25 15:38:01,426 INFO L130 PetriNetUnfolder]: 29/296 cut-off events. [2022-11-25 15:38:01,427 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:38:01,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 296 events. 29/296 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. 0/267 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-11-25 15:38:01,433 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2022-11-25 15:38:14,061 INFO L134 LiptonReduction]: Checked pairs total: 10083 [2022-11-25 15:38:14,062 INFO L136 LiptonReduction]: Total number of compositions: 321 [2022-11-25 15:38:14,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:38:14,106 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;@76236ee9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:38:14,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 15:38:14,121 INFO L130 PetriNetUnfolder]: 11/38 cut-off events. [2022-11-25 15:38:14,121 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:38:14,122 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:14,122 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:14,123 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)] === [2022-11-25 15:38:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash -954664945, now seen corresponding path program 1 times [2022-11-25 15:38:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:14,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170085506] [2022-11-25 15:38:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:14,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:14,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:14,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170085506] [2022-11-25 15:38:14,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170085506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:14,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:14,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:38:14,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697903684] [2022-11-25 15:38:14,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:14,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:14,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:38:14,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 631 [2022-11-25 15:38:14,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:14,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 631 [2022-11-25 15:38:14,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:15,142 INFO L130 PetriNetUnfolder]: 1087/1508 cut-off events. [2022-11-25 15:38:15,143 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-11-25 15:38:15,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3097 conditions, 1508 events. 1087/1508 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5384 event pairs, 481 based on Foata normal form. 1/988 useless extension candidates. Maximal degree in co-relation 2526. Up to 1127 conditions per place. [2022-11-25 15:38:15,153 INFO L137 encePairwiseOnDemand]: 628/631 looper letters, 34 selfloop transitions, 0 changer transitions 25/60 dead transitions. [2022-11-25 15:38:15,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 60 transitions, 271 flow [2022-11-25 15:38:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 915 transitions. [2022-11-25 15:38:15,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48335974643423135 [2022-11-25 15:38:15,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 915 transitions. [2022-11-25 15:38:15,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 915 transitions. [2022-11-25 15:38:15,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:15,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 915 transitions. [2022-11-25 15:38:15,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,207 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 96 flow. Second operand 3 states and 915 transitions. [2022-11-25 15:38:15,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 60 transitions, 271 flow [2022-11-25 15:38:15,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 249 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 15:38:15,216 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 78 flow [2022-11-25 15:38:15,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2022-11-25 15:38:15,223 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2022-11-25 15:38:15,223 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 78 flow [2022-11-25 15:38:15,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,224 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:15,224 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] [2022-11-25 15:38:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:38:15,226 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)] === [2022-11-25 15:38:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1447734684, now seen corresponding path program 1 times [2022-11-25 15:38:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:15,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063773485] [2022-11-25 15:38:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:15,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:16,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:16,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063773485] [2022-11-25 15:38:16,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063773485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:16,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:16,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:16,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966799605] [2022-11-25 15:38:16,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:16,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:38:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:38:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:38:16,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 631 [2022-11-25 15:38:16,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:16,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:16,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 631 [2022-11-25 15:38:16,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:17,076 INFO L130 PetriNetUnfolder]: 644/909 cut-off events. [2022-11-25 15:38:17,077 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 15:38:17,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1846 conditions, 909 events. 644/909 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3106 event pairs, 19 based on Foata normal form. 1/617 useless extension candidates. Maximal degree in co-relation 1842. Up to 326 conditions per place. [2022-11-25 15:38:17,082 INFO L137 encePairwiseOnDemand]: 623/631 looper letters, 85 selfloop transitions, 14 changer transitions 10/110 dead transitions. [2022-11-25 15:38:17,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 110 transitions, 460 flow [2022-11-25 15:38:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:38:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:38:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2028 transitions. [2022-11-25 15:38:17,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4591351596105954 [2022-11-25 15:38:17,090 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2028 transitions. [2022-11-25 15:38:17,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2028 transitions. [2022-11-25 15:38:17,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:17,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2028 transitions. [2022-11-25 15:38:17,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 289.7142857142857) internal successors, (2028), 7 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 631.0) internal successors, (5048), 8 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,109 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 631.0) internal successors, (5048), 8 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,110 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 78 flow. Second operand 7 states and 2028 transitions. [2022-11-25 15:38:17,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 110 transitions, 460 flow [2022-11-25 15:38:17,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 110 transitions, 456 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:17,113 INFO L231 Difference]: Finished difference. Result has 41 places, 47 transitions, 165 flow [2022-11-25 15:38:17,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=41, PETRI_TRANSITIONS=47} [2022-11-25 15:38:17,114 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2022-11-25 15:38:17,114 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 47 transitions, 165 flow [2022-11-25 15:38:17,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:17,115 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] [2022-11-25 15:38:17,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:38:17,116 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)] === [2022-11-25 15:38:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1399817644, now seen corresponding path program 2 times [2022-11-25 15:38:17,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:17,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178264566] [2022-11-25 15:38:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:17,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178264566] [2022-11-25 15:38:17,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178264566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:17,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:17,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:17,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198700124] [2022-11-25 15:38:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:17,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:38:17,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:38:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:38:17,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 631 [2022-11-25 15:38:17,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 47 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:17,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:17,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 631 [2022-11-25 15:38:17,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:18,311 INFO L130 PetriNetUnfolder]: 705/1016 cut-off events. [2022-11-25 15:38:18,311 INFO L131 PetriNetUnfolder]: For 488/512 co-relation queries the response was YES. [2022-11-25 15:38:18,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2630 conditions, 1016 events. 705/1016 cut-off events. For 488/512 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3736 event pairs, 58 based on Foata normal form. 25/930 useless extension candidates. Maximal degree in co-relation 2622. Up to 706 conditions per place. [2022-11-25 15:38:18,318 INFO L137 encePairwiseOnDemand]: 627/631 looper letters, 73 selfloop transitions, 4 changer transitions 10/88 dead transitions. [2022-11-25 15:38:18,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 88 transitions, 460 flow [2022-11-25 15:38:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1447 transitions. [2022-11-25 15:38:18,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4586370839936609 [2022-11-25 15:38:18,323 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1447 transitions. [2022-11-25 15:38:18,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1447 transitions. [2022-11-25 15:38:18,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:18,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1447 transitions. [2022-11-25 15:38:18,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:18,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:18,335 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:18,335 INFO L175 Difference]: Start difference. First operand has 41 places, 47 transitions, 165 flow. Second operand 5 states and 1447 transitions. [2022-11-25 15:38:18,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 88 transitions, 460 flow [2022-11-25 15:38:18,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 88 transitions, 456 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:18,339 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 191 flow [2022-11-25 15:38:18,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2022-11-25 15:38:18,340 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2022-11-25 15:38:18,340 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 191 flow [2022-11-25 15:38:18,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:18,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:18,342 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] [2022-11-25 15:38:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:38:18,342 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)] === [2022-11-25 15:38:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1858818148, now seen corresponding path program 3 times [2022-11-25 15:38:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:18,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602590805] [2022-11-25 15:38:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:18,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:19,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602590805] [2022-11-25 15:38:19,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602590805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:19,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:19,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:19,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461061744] [2022-11-25 15:38:19,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:19,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:38:19,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:19,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:38:19,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:38:19,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 631 [2022-11-25 15:38:19,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:19,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 631 [2022-11-25 15:38:19,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:19,541 INFO L130 PetriNetUnfolder]: 769/1164 cut-off events. [2022-11-25 15:38:19,546 INFO L131 PetriNetUnfolder]: For 1198/1210 co-relation queries the response was YES. [2022-11-25 15:38:19,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3141 conditions, 1164 events. 769/1164 cut-off events. For 1198/1210 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4549 event pairs, 336 based on Foata normal form. 1/1044 useless extension candidates. Maximal degree in co-relation 3130. Up to 866 conditions per place. [2022-11-25 15:38:19,555 INFO L137 encePairwiseOnDemand]: 627/631 looper letters, 69 selfloop transitions, 5 changer transitions 11/86 dead transitions. [2022-11-25 15:38:19,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 86 transitions, 483 flow [2022-11-25 15:38:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1442 transitions. [2022-11-25 15:38:19,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45705229793977814 [2022-11-25 15:38:19,562 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1442 transitions. [2022-11-25 15:38:19,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1442 transitions. [2022-11-25 15:38:19,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:19,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1442 transitions. [2022-11-25 15:38:19,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.4) internal successors, (1442), 5 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,582 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,583 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 191 flow. Second operand 5 states and 1442 transitions. [2022-11-25 15:38:19,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 86 transitions, 483 flow [2022-11-25 15:38:19,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 86 transitions, 469 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:19,594 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 221 flow [2022-11-25 15:38:19,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2022-11-25 15:38:19,596 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2022-11-25 15:38:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 221 flow [2022-11-25 15:38:19,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:19,599 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] [2022-11-25 15:38:19,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:38:19,599 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)] === [2022-11-25 15:38:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2101292484, now seen corresponding path program 4 times [2022-11-25 15:38:19,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:19,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281512722] [2022-11-25 15:38:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:20,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281512722] [2022-11-25 15:38:20,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281512722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:20,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:20,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:20,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815319053] [2022-11-25 15:38:20,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:20,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:38:20,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:20,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:38:20,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:38:20,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 631 [2022-11-25 15:38:20,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:20,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:20,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 631 [2022-11-25 15:38:20,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:20,906 INFO L130 PetriNetUnfolder]: 860/1313 cut-off events. [2022-11-25 15:38:20,906 INFO L131 PetriNetUnfolder]: For 1606/1626 co-relation queries the response was YES. [2022-11-25 15:38:20,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3635 conditions, 1313 events. 860/1313 cut-off events. For 1606/1626 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5408 event pairs, 185 based on Foata normal form. 21/1191 useless extension candidates. Maximal degree in co-relation 3622. Up to 538 conditions per place. [2022-11-25 15:38:20,916 INFO L137 encePairwiseOnDemand]: 623/631 looper letters, 81 selfloop transitions, 15 changer transitions 10/107 dead transitions. [2022-11-25 15:38:20,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 107 transitions, 599 flow [2022-11-25 15:38:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:38:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:38:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1743 transitions. [2022-11-25 15:38:20,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46038034865293187 [2022-11-25 15:38:20,922 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1743 transitions. [2022-11-25 15:38:20,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1743 transitions. [2022-11-25 15:38:20,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:20,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1743 transitions. [2022-11-25 15:38:20,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 290.5) internal successors, (1743), 6 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:20,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 631.0) internal successors, (4417), 7 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:20,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 631.0) internal successors, (4417), 7 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:20,939 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 221 flow. Second operand 6 states and 1743 transitions. [2022-11-25 15:38:20,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 107 transitions, 599 flow [2022-11-25 15:38:20,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 107 transitions, 580 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 15:38:20,951 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 259 flow [2022-11-25 15:38:20,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=259, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2022-11-25 15:38:20,954 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2022-11-25 15:38:20,955 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 259 flow [2022-11-25 15:38:20,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:20,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:20,956 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] [2022-11-25 15:38:20,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:38:20,957 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)] === [2022-11-25 15:38:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash 553731338, now seen corresponding path program 5 times [2022-11-25 15:38:20,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:20,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035456113] [2022-11-25 15:38:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:20,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:21,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035456113] [2022-11-25 15:38:21,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035456113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:21,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:21,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:21,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797845195] [2022-11-25 15:38:21,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:21,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:38:21,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:38:21,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:38:21,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 631 [2022-11-25 15:38:21,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:21,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:21,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 631 [2022-11-25 15:38:21,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:22,127 INFO L130 PetriNetUnfolder]: 849/1292 cut-off events. [2022-11-25 15:38:22,127 INFO L131 PetriNetUnfolder]: For 2230/2246 co-relation queries the response was YES. [2022-11-25 15:38:22,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 1292 events. 849/1292 cut-off events. For 2230/2246 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5229 event pairs, 420 based on Foata normal form. 1/1150 useless extension candidates. Maximal degree in co-relation 3750. Up to 1000 conditions per place. [2022-11-25 15:38:22,137 INFO L137 encePairwiseOnDemand]: 627/631 looper letters, 74 selfloop transitions, 6 changer transitions 10/91 dead transitions. [2022-11-25 15:38:22,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 91 transitions, 558 flow [2022-11-25 15:38:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1446 transitions. [2022-11-25 15:38:22,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4583201267828843 [2022-11-25 15:38:22,143 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1446 transitions. [2022-11-25 15:38:22,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1446 transitions. [2022-11-25 15:38:22,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:22,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1446 transitions. [2022-11-25 15:38:22,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.2) internal successors, (1446), 5 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:22,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:22,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:22,155 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 259 flow. Second operand 5 states and 1446 transitions. [2022-11-25 15:38:22,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 91 transitions, 558 flow [2022-11-25 15:38:22,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 91 transitions, 541 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:22,165 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 270 flow [2022-11-25 15:38:22,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-11-25 15:38:22,168 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2022-11-25 15:38:22,168 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 270 flow [2022-11-25 15:38:22,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:22,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:22,169 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] [2022-11-25 15:38:22,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:38:22,170 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)] === [2022-11-25 15:38:22,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash 662313978, now seen corresponding path program 6 times [2022-11-25 15:38:22,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:22,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105268732] [2022-11-25 15:38:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:22,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:22,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:22,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105268732] [2022-11-25 15:38:22,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105268732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:22,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:22,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:22,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964989543] [2022-11-25 15:38:22,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:22,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:38:22,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:38:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:38:22,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 631 [2022-11-25 15:38:22,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:22,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:22,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 631 [2022-11-25 15:38:22,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:23,387 INFO L130 PetriNetUnfolder]: 836/1265 cut-off events. [2022-11-25 15:38:23,388 INFO L131 PetriNetUnfolder]: For 1880/1900 co-relation queries the response was YES. [2022-11-25 15:38:23,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3718 conditions, 1265 events. 836/1265 cut-off events. For 1880/1900 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4955 event pairs, 388 based on Foata normal form. 17/1143 useless extension candidates. Maximal degree in co-relation 3702. Up to 930 conditions per place. [2022-11-25 15:38:23,397 INFO L137 encePairwiseOnDemand]: 627/631 looper letters, 61 selfloop transitions, 4 changer transitions 12/78 dead transitions. [2022-11-25 15:38:23,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 501 flow [2022-11-25 15:38:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1434 transitions. [2022-11-25 15:38:23,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45451664025356575 [2022-11-25 15:38:23,402 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1434 transitions. [2022-11-25 15:38:23,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1434 transitions. [2022-11-25 15:38:23,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:23,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1434 transitions. [2022-11-25 15:38:23,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.8) internal successors, (1434), 5 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,415 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,415 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 270 flow. Second operand 5 states and 1434 transitions. [2022-11-25 15:38:23,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 501 flow [2022-11-25 15:38:23,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 490 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 15:38:23,429 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 265 flow [2022-11-25 15:38:23,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2022-11-25 15:38:23,430 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2022-11-25 15:38:23,430 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 265 flow [2022-11-25 15:38:23,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:23,431 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] [2022-11-25 15:38:23,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:38:23,432 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)] === [2022-11-25 15:38:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash 218623953, now seen corresponding path program 1 times [2022-11-25 15:38:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:23,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80044201] [2022-11-25 15:38:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:23,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:23,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80044201] [2022-11-25 15:38:23,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80044201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:23,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:23,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:23,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707255644] [2022-11-25 15:38:23,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:23,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:23,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:23,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:23,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 631 [2022-11-25 15:38:23,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:23,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 631 [2022-11-25 15:38:23,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:23,912 INFO L130 PetriNetUnfolder]: 1074/1632 cut-off events. [2022-11-25 15:38:23,912 INFO L131 PetriNetUnfolder]: For 2880/2900 co-relation queries the response was YES. [2022-11-25 15:38:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4638 conditions, 1632 events. 1074/1632 cut-off events. For 2880/2900 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7219 event pairs, 78 based on Foata normal form. 54/1487 useless extension candidates. Maximal degree in co-relation 4622. Up to 974 conditions per place. [2022-11-25 15:38:23,926 INFO L137 encePairwiseOnDemand]: 627/631 looper letters, 82 selfloop transitions, 7 changer transitions 0/90 dead transitions. [2022-11-25 15:38:23,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 90 transitions, 602 flow [2022-11-25 15:38:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2022-11-25 15:38:23,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46988906497622823 [2022-11-25 15:38:23,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2022-11-25 15:38:23,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2022-11-25 15:38:23,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:23,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2022-11-25 15:38:23,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,958 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,958 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 265 flow. Second operand 4 states and 1186 transitions. [2022-11-25 15:38:23,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 90 transitions, 602 flow [2022-11-25 15:38:23,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 90 transitions, 588 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:23,971 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 330 flow [2022-11-25 15:38:23,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2022-11-25 15:38:23,974 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2022-11-25 15:38:23,974 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 330 flow [2022-11-25 15:38:23,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:23,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:23,975 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] [2022-11-25 15:38:23,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:38:23,975 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)] === [2022-11-25 15:38:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 189097427, now seen corresponding path program 2 times [2022-11-25 15:38:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:23,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054260545] [2022-11-25 15:38:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:23,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:24,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:24,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054260545] [2022-11-25 15:38:24,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054260545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:24,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:24,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:24,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826548849] [2022-11-25 15:38:24,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:24,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:24,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:24,154 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 631 [2022-11-25 15:38:24,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:24,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:24,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 631 [2022-11-25 15:38:24,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:24,518 INFO L130 PetriNetUnfolder]: 988/1510 cut-off events. [2022-11-25 15:38:24,518 INFO L131 PetriNetUnfolder]: For 2638/2658 co-relation queries the response was YES. [2022-11-25 15:38:24,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4496 conditions, 1510 events. 988/1510 cut-off events. For 2638/2658 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6595 event pairs, 59 based on Foata normal form. 48/1375 useless extension candidates. Maximal degree in co-relation 4479. Up to 880 conditions per place. [2022-11-25 15:38:24,532 INFO L137 encePairwiseOnDemand]: 627/631 looper letters, 84 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2022-11-25 15:38:24,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 661 flow [2022-11-25 15:38:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1185 transitions. [2022-11-25 15:38:24,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4694928684627575 [2022-11-25 15:38:24,537 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1185 transitions. [2022-11-25 15:38:24,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1185 transitions. [2022-11-25 15:38:24,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:24,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1185 transitions. [2022-11-25 15:38:24,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:24,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:24,547 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:24,548 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 330 flow. Second operand 4 states and 1185 transitions. [2022-11-25 15:38:24,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 661 flow [2022-11-25 15:38:24,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 651 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:24,558 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 389 flow [2022-11-25 15:38:24,559 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2022-11-25 15:38:24,559 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2022-11-25 15:38:24,560 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 389 flow [2022-11-25 15:38:24,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:24,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:24,561 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] [2022-11-25 15:38:24,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:38:24,561 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)] === [2022-11-25 15:38:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:24,562 INFO L85 PathProgramCache]: Analyzing trace with hash -34359187, now seen corresponding path program 3 times [2022-11-25 15:38:24,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:24,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335143796] [2022-11-25 15:38:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:24,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:24,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:24,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335143796] [2022-11-25 15:38:24,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335143796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:24,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:24,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:24,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003407617] [2022-11-25 15:38:24,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:24,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:24,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:24,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 631 [2022-11-25 15:38:24,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:24,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:24,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 631 [2022-11-25 15:38:24,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:25,057 INFO L130 PetriNetUnfolder]: 928/1402 cut-off events. [2022-11-25 15:38:25,057 INFO L131 PetriNetUnfolder]: For 2859/2879 co-relation queries the response was YES. [2022-11-25 15:38:25,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 1402 events. 928/1402 cut-off events. For 2859/2879 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5843 event pairs, 209 based on Foata normal form. 22/1257 useless extension candidates. Maximal degree in co-relation 4489. Up to 1060 conditions per place. [2022-11-25 15:38:25,069 INFO L137 encePairwiseOnDemand]: 626/631 looper letters, 76 selfloop transitions, 14 changer transitions 1/92 dead transitions. [2022-11-25 15:38:25,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 686 flow [2022-11-25 15:38:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1456 transitions. [2022-11-25 15:38:25,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4614896988906498 [2022-11-25 15:38:25,074 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1456 transitions. [2022-11-25 15:38:25,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1456 transitions. [2022-11-25 15:38:25,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:25,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1456 transitions. [2022-11-25 15:38:25,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.2) internal successors, (1456), 5 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,087 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,087 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 389 flow. Second operand 5 states and 1456 transitions. [2022-11-25 15:38:25,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 686 flow [2022-11-25 15:38:25,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 684 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 15:38:25,098 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 427 flow [2022-11-25 15:38:25,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2022-11-25 15:38:25,100 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2022-11-25 15:38:25,100 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 427 flow [2022-11-25 15:38:25,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:25,102 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] [2022-11-25 15:38:25,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 15:38:25,102 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)] === [2022-11-25 15:38:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash 11399413, now seen corresponding path program 1 times [2022-11-25 15:38:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:25,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103262532] [2022-11-25 15:38:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:25,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:25,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:25,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103262532] [2022-11-25 15:38:25,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103262532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:25,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:25,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:25,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306155360] [2022-11-25 15:38:25,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:25,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:25,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:25,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 631 [2022-11-25 15:38:25,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 427 flow. Second operand has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:25,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 631 [2022-11-25 15:38:25,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:25,587 INFO L130 PetriNetUnfolder]: 1007/1549 cut-off events. [2022-11-25 15:38:25,587 INFO L131 PetriNetUnfolder]: For 3689/3689 co-relation queries the response was YES. [2022-11-25 15:38:25,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4925 conditions, 1549 events. 1007/1549 cut-off events. For 3689/3689 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6836 event pairs, 146 based on Foata normal form. 16/1386 useless extension candidates. Maximal degree in co-relation 4903. Up to 1186 conditions per place. [2022-11-25 15:38:25,602 INFO L137 encePairwiseOnDemand]: 627/631 looper letters, 77 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2022-11-25 15:38:25,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 712 flow [2022-11-25 15:38:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1179 transitions. [2022-11-25 15:38:25,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46711568938193343 [2022-11-25 15:38:25,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1179 transitions. [2022-11-25 15:38:25,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1179 transitions. [2022-11-25 15:38:25,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:25,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1179 transitions. [2022-11-25 15:38:25,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.75) internal successors, (1179), 4 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,617 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,617 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 427 flow. Second operand 4 states and 1179 transitions. [2022-11-25 15:38:25,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 712 flow [2022-11-25 15:38:25,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 675 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-25 15:38:25,631 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 467 flow [2022-11-25 15:38:25,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=467, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-25 15:38:25,632 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2022-11-25 15:38:25,632 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 467 flow [2022-11-25 15:38:25,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:25,633 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] [2022-11-25 15:38:25,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 15:38:25,633 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)] === [2022-11-25 15:38:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:25,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1918100817, now seen corresponding path program 2 times [2022-11-25 15:38:25,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:25,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559559426] [2022-11-25 15:38:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:25,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:25,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559559426] [2022-11-25 15:38:25,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559559426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:25,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:25,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:25,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278943188] [2022-11-25 15:38:25,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:25,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:25,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:25,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:25,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:25,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 631 [2022-11-25 15:38:25,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:25,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:25,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 631 [2022-11-25 15:38:25,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:26,191 INFO L130 PetriNetUnfolder]: 971/1485 cut-off events. [2022-11-25 15:38:26,191 INFO L131 PetriNetUnfolder]: For 2804/2810 co-relation queries the response was YES. [2022-11-25 15:38:26,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4876 conditions, 1485 events. 971/1485 cut-off events. For 2804/2810 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6357 event pairs, 237 based on Foata normal form. 14/1324 useless extension candidates. Maximal degree in co-relation 4857. Up to 1076 conditions per place. [2022-11-25 15:38:26,202 INFO L137 encePairwiseOnDemand]: 626/631 looper letters, 79 selfloop transitions, 14 changer transitions 2/96 dead transitions. [2022-11-25 15:38:26,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 772 flow [2022-11-25 15:38:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1456 transitions. [2022-11-25 15:38:26,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4614896988906498 [2022-11-25 15:38:26,207 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1456 transitions. [2022-11-25 15:38:26,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1456 transitions. [2022-11-25 15:38:26,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:26,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1456 transitions. [2022-11-25 15:38:26,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.2) internal successors, (1456), 5 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:26,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:26,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:26,218 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 467 flow. Second operand 5 states and 1456 transitions. [2022-11-25 15:38:26,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 772 flow [2022-11-25 15:38:26,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 753 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:26,227 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 506 flow [2022-11-25 15:38:26,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=506, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2022-11-25 15:38:26,228 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2022-11-25 15:38:26,228 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 506 flow [2022-11-25 15:38:26,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:26,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:26,229 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] [2022-11-25 15:38:26,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 15:38:26,230 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)] === [2022-11-25 15:38:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:26,230 INFO L85 PathProgramCache]: Analyzing trace with hash -189995619, now seen corresponding path program 3 times [2022-11-25 15:38:26,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:26,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376181038] [2022-11-25 15:38:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:26,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:26,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376181038] [2022-11-25 15:38:26,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376181038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:26,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:26,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:26,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277585202] [2022-11-25 15:38:26,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:26,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:26,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:26,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 631 [2022-11-25 15:38:26,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 506 flow. Second operand has 4 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) [2022-11-25 15:38:26,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:26,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 631 [2022-11-25 15:38:26,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:26,739 INFO L130 PetriNetUnfolder]: 875/1318 cut-off events. [2022-11-25 15:38:26,740 INFO L131 PetriNetUnfolder]: For 3262/3266 co-relation queries the response was YES. [2022-11-25 15:38:26,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4408 conditions, 1318 events. 875/1318 cut-off events. For 3262/3266 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5242 event pairs, 335 based on Foata normal form. 20/1177 useless extension candidates. Maximal degree in co-relation 4388. Up to 959 conditions per place. [2022-11-25 15:38:26,756 INFO L137 encePairwiseOnDemand]: 626/631 looper letters, 91 selfloop transitions, 10 changer transitions 4/106 dead transitions. [2022-11-25 15:38:26,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 106 transitions, 826 flow [2022-11-25 15:38:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1469 transitions. [2022-11-25 15:38:26,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46561014263074485 [2022-11-25 15:38:26,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1469 transitions. [2022-11-25 15:38:26,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1469 transitions. [2022-11-25 15:38:26,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:26,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1469 transitions. [2022-11-25 15:38:26,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 293.8) internal successors, (1469), 5 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:26,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:26,774 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 631.0) internal successors, (3786), 6 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:26,774 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 506 flow. Second operand 5 states and 1469 transitions. [2022-11-25 15:38:26,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 106 transitions, 826 flow [2022-11-25 15:38:26,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 813 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:26,786 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 484 flow [2022-11-25 15:38:26,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=484, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2022-11-25 15:38:26,788 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2022-11-25 15:38:26,788 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 484 flow [2022-11-25 15:38:26,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-25 15:38:26,789 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:26,789 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] [2022-11-25 15:38:26,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 15:38:26,790 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)] === [2022-11-25 15:38:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash 400926029, now seen corresponding path program 4 times [2022-11-25 15:38:26,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:26,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231944207] [2022-11-25 15:38:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:26,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:26,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231944207] [2022-11-25 15:38:26,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231944207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:26,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:26,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246080222] [2022-11-25 15:38:26,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:26,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:26,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 631 [2022-11-25 15:38:26,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 484 flow. Second operand has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:26,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:26,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 631 [2022-11-25 15:38:26,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:27,284 INFO L130 PetriNetUnfolder]: 815/1221 cut-off events. [2022-11-25 15:38:27,284 INFO L131 PetriNetUnfolder]: For 3170/3176 co-relation queries the response was YES. [2022-11-25 15:38:27,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4074 conditions, 1221 events. 815/1221 cut-off events. For 3170/3176 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4821 event pairs, 146 based on Foata normal form. 16/1092 useless extension candidates. Maximal degree in co-relation 4054. Up to 1022 conditions per place. [2022-11-25 15:38:27,293 INFO L137 encePairwiseOnDemand]: 627/631 looper letters, 69 selfloop transitions, 11 changer transitions 3/84 dead transitions. [2022-11-25 15:38:27,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 689 flow [2022-11-25 15:38:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1176 transitions. [2022-11-25 15:38:27,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4659270998415214 [2022-11-25 15:38:27,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1176 transitions. [2022-11-25 15:38:27,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1176 transitions. [2022-11-25 15:38:27,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:27,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1176 transitions. [2022-11-25 15:38:27,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,307 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,307 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 484 flow. Second operand 4 states and 1176 transitions. [2022-11-25 15:38:27,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 689 flow [2022-11-25 15:38:27,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 663 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-25 15:38:27,317 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 446 flow [2022-11-25 15:38:27,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=446, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2022-11-25 15:38:27,317 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2022-11-25 15:38:27,318 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 446 flow [2022-11-25 15:38:27,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:27,319 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] [2022-11-25 15:38:27,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 15:38:27,319 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)] === [2022-11-25 15:38:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1520201791, now seen corresponding path program 4 times [2022-11-25 15:38:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864658057] [2022-11-25 15:38:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:27,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:27,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864658057] [2022-11-25 15:38:27,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864658057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:27,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:27,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:27,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632043570] [2022-11-25 15:38:27,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:27,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:27,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:27,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 631 [2022-11-25 15:38:27,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 446 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:27,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 631 [2022-11-25 15:38:27,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:27,768 INFO L130 PetriNetUnfolder]: 800/1204 cut-off events. [2022-11-25 15:38:27,769 INFO L131 PetriNetUnfolder]: For 2286/2292 co-relation queries the response was YES. [2022-11-25 15:38:27,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3935 conditions, 1204 events. 800/1204 cut-off events. For 2286/2292 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4807 event pairs, 135 based on Foata normal form. 16/1077 useless extension candidates. Maximal degree in co-relation 3917. Up to 1076 conditions per place. [2022-11-25 15:38:27,778 INFO L137 encePairwiseOnDemand]: 626/631 looper letters, 60 selfloop transitions, 6 changer transitions 12/79 dead transitions. [2022-11-25 15:38:27,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 79 transitions, 648 flow [2022-11-25 15:38:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1164 transitions. [2022-11-25 15:38:27,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4611727416798732 [2022-11-25 15:38:27,782 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1164 transitions. [2022-11-25 15:38:27,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1164 transitions. [2022-11-25 15:38:27,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:27,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1164 transitions. [2022-11-25 15:38:27,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,791 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 446 flow. Second operand 4 states and 1164 transitions. [2022-11-25 15:38:27,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 79 transitions, 648 flow [2022-11-25 15:38:27,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 79 transitions, 617 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-25 15:38:27,798 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 383 flow [2022-11-25 15:38:27,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=383, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2022-11-25 15:38:27,799 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2022-11-25 15:38:27,799 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 383 flow [2022-11-25 15:38:27,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:27,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:27,800 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] [2022-11-25 15:38:27,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 15:38:27,800 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)] === [2022-11-25 15:38:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash -476597763, now seen corresponding path program 5 times [2022-11-25 15:38:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:27,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420516875] [2022-11-25 15:38:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:27,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:27,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420516875] [2022-11-25 15:38:27,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420516875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:27,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:27,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:27,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192754671] [2022-11-25 15:38:27,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:27,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:27,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:27,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:27,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 631 [2022-11-25 15:38:27,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 383 flow. Second operand has 4 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) [2022-11-25 15:38:27,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:27,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 631 [2022-11-25 15:38:27,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:28,196 INFO L130 PetriNetUnfolder]: 750/1111 cut-off events. [2022-11-25 15:38:28,196 INFO L131 PetriNetUnfolder]: For 1727/1727 co-relation queries the response was YES. [2022-11-25 15:38:28,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3609 conditions, 1111 events. 750/1111 cut-off events. For 1727/1727 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4139 event pairs, 374 based on Foata normal form. 4/972 useless extension candidates. Maximal degree in co-relation 3592. Up to 1074 conditions per place. [2022-11-25 15:38:28,205 INFO L137 encePairwiseOnDemand]: 628/631 looper letters, 55 selfloop transitions, 0 changer transitions 8/64 dead transitions. [2022-11-25 15:38:28,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 509 flow [2022-11-25 15:38:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1154 transitions. [2022-11-25 15:38:28,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4572107765451664 [2022-11-25 15:38:28,233 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1154 transitions. [2022-11-25 15:38:28,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1154 transitions. [2022-11-25 15:38:28,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:28,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1154 transitions. [2022-11-25 15:38:28,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.5) internal successors, (1154), 4 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:28,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:28,245 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:28,245 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 383 flow. Second operand 4 states and 1154 transitions. [2022-11-25 15:38:28,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 509 flow [2022-11-25 15:38:28,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 483 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 15:38:28,250 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 319 flow [2022-11-25 15:38:28,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2022-11-25 15:38:28,251 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2022-11-25 15:38:28,251 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 319 flow [2022-11-25 15:38:28,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-25 15:38:28,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:28,252 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] [2022-11-25 15:38:28,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 15:38:28,253 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)] === [2022-11-25 15:38:28,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2125615649, now seen corresponding path program 5 times [2022-11-25 15:38:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:28,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173832377] [2022-11-25 15:38:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:28,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:28,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:28,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173832377] [2022-11-25 15:38:28,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173832377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:28,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:28,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:38:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978709665] [2022-11-25 15:38:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:28,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 631 [2022-11-25 15:38:28,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 319 flow. Second operand has 4 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) [2022-11-25 15:38:28,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:28,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 631 [2022-11-25 15:38:28,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:28,714 INFO L130 PetriNetUnfolder]: 683/1000 cut-off events. [2022-11-25 15:38:28,715 INFO L131 PetriNetUnfolder]: For 1141/1141 co-relation queries the response was YES. [2022-11-25 15:38:28,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3104 conditions, 1000 events. 683/1000 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3559 event pairs, 327 based on Foata normal form. 8/881 useless extension candidates. Maximal degree in co-relation 3091. Up to 959 conditions per place. [2022-11-25 15:38:28,722 INFO L137 encePairwiseOnDemand]: 628/631 looper letters, 52 selfloop transitions, 0 changer transitions 9/62 dead transitions. [2022-11-25 15:38:28,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 448 flow [2022-11-25 15:38:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1154 transitions. [2022-11-25 15:38:28,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4572107765451664 [2022-11-25 15:38:28,727 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1154 transitions. [2022-11-25 15:38:28,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1154 transitions. [2022-11-25 15:38:28,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:28,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1154 transitions. [2022-11-25 15:38:28,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.5) internal successors, (1154), 4 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:28,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:28,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 631.0) internal successors, (3155), 5 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:28,739 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 319 flow. Second operand 4 states and 1154 transitions. [2022-11-25 15:38:28,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 448 flow [2022-11-25 15:38:28,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 446 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:28,743 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 281 flow [2022-11-25 15:38:28,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2022-11-25 15:38:28,743 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2022-11-25 15:38:28,744 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 281 flow [2022-11-25 15:38:28,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-25 15:38:28,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:28,745 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] [2022-11-25 15:38:28,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 15:38:28,745 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)] === [2022-11-25 15:38:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1454690476, now seen corresponding path program 1 times [2022-11-25 15:38:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:28,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005198517] [2022-11-25 15:38:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:29,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:29,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005198517] [2022-11-25 15:38:29,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005198517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:29,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:29,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 15:38:29,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985453258] [2022-11-25 15:38:29,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:29,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:38:29,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:29,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:38:29,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:38:30,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 631 [2022-11-25 15:38:30,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 260.2) internal successors, (2602), 10 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:30,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:30,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 631 [2022-11-25 15:38:30,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:31,422 INFO L130 PetriNetUnfolder]: 1362/2042 cut-off events. [2022-11-25 15:38:31,422 INFO L131 PetriNetUnfolder]: For 2066/2066 co-relation queries the response was YES. [2022-11-25 15:38:31,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6330 conditions, 2042 events. 1362/2042 cut-off events. For 2066/2066 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8966 event pairs, 244 based on Foata normal form. 61/1850 useless extension candidates. Maximal degree in co-relation 6317. Up to 556 conditions per place. [2022-11-25 15:38:31,435 INFO L137 encePairwiseOnDemand]: 617/631 looper letters, 128 selfloop transitions, 29 changer transitions 12/170 dead transitions. [2022-11-25 15:38:31,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 170 transitions, 1121 flow [2022-11-25 15:38:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:38:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 15:38:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2969 transitions. [2022-11-25 15:38:31,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277481630888921 [2022-11-25 15:38:31,444 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2969 transitions. [2022-11-25 15:38:31,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2969 transitions. [2022-11-25 15:38:31,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:31,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2969 transitions. [2022-11-25 15:38:31,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 269.90909090909093) internal successors, (2969), 11 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:31,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 631.0) internal successors, (7572), 12 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:31,462 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 631.0) internal successors, (7572), 12 states have internal predecessors, (7572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:31,462 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 281 flow. Second operand 11 states and 2969 transitions. [2022-11-25 15:38:31,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 170 transitions, 1121 flow [2022-11-25 15:38:31,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 170 transitions, 1115 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:31,469 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 576 flow [2022-11-25 15:38:31,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=576, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2022-11-25 15:38:31,469 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2022-11-25 15:38:31,470 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 576 flow [2022-11-25 15:38:31,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 260.2) internal successors, (2602), 10 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:31,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:31,471 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:31,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 15:38:31,471 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)] === [2022-11-25 15:38:31,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:31,472 INFO L85 PathProgramCache]: Analyzing trace with hash -108329615, now seen corresponding path program 1 times [2022-11-25 15:38:31,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:31,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351691889] [2022-11-25 15:38:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:31,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:31,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:31,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351691889] [2022-11-25 15:38:31,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351691889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:31,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414428649] [2022-11-25 15:38:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:31,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:31,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:31,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:31,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:38:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 15:38:31,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:32,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:33,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:33,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 125 [2022-11-25 15:38:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:34,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414428649] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:34,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:38:34,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-11-25 15:38:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559542199] [2022-11-25 15:38:34,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:38:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:34,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:38:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:38:35,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 631 [2022-11-25 15:38:35,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 576 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:35,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:35,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 631 [2022-11-25 15:38:35,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:37,273 INFO L130 PetriNetUnfolder]: 2307/3470 cut-off events. [2022-11-25 15:38:37,273 INFO L131 PetriNetUnfolder]: For 6571/6613 co-relation queries the response was YES. [2022-11-25 15:38:37,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12451 conditions, 3470 events. 2307/3470 cut-off events. For 6571/6613 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17071 event pairs, 269 based on Foata normal form. 30/3096 useless extension candidates. Maximal degree in co-relation 12429. Up to 718 conditions per place. [2022-11-25 15:38:37,304 INFO L137 encePairwiseOnDemand]: 617/631 looper letters, 228 selfloop transitions, 55 changer transitions 9/293 dead transitions. [2022-11-25 15:38:37,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 293 transitions, 2423 flow [2022-11-25 15:38:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:38:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 15:38:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3300 transitions. [2022-11-25 15:38:37,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4022918444471535 [2022-11-25 15:38:37,314 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3300 transitions. [2022-11-25 15:38:37,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3300 transitions. [2022-11-25 15:38:37,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:37,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3300 transitions. [2022-11-25 15:38:37,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 253.84615384615384) internal successors, (3300), 13 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:37,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:37,336 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:37,337 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 576 flow. Second operand 13 states and 3300 transitions. [2022-11-25 15:38:37,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 293 transitions, 2423 flow [2022-11-25 15:38:37,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 293 transitions, 2358 flow, removed 17 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:37,366 INFO L231 Difference]: Finished difference. Result has 97 places, 123 transitions, 1206 flow [2022-11-25 15:38:37,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1206, PETRI_PLACES=97, PETRI_TRANSITIONS=123} [2022-11-25 15:38:37,367 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2022-11-25 15:38:37,368 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 123 transitions, 1206 flow [2022-11-25 15:38:37,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:37,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:37,369 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] [2022-11-25 15:38:37,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 15:38:37,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:37,576 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)] === [2022-11-25 15:38:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash 641627329, now seen corresponding path program 1 times [2022-11-25 15:38:37,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:37,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109850034] [2022-11-25 15:38:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:37,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:37,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:37,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109850034] [2022-11-25 15:38:37,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109850034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:37,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672047039] [2022-11-25 15:38:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:37,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:37,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:37,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:37,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:38:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:38:38,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:38,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:38,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 84 [2022-11-25 15:38:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:38,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:39,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:39,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 125 [2022-11-25 15:38:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:41,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672047039] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:41,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:38:41,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 11] total 25 [2022-11-25 15:38:41,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754511294] [2022-11-25 15:38:41,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:41,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:38:41,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:41,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:38:41,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:38:42,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 631 [2022-11-25 15:38:42,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 123 transitions, 1206 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:42,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:42,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 631 [2022-11-25 15:38:42,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:47,212 INFO L130 PetriNetUnfolder]: 4255/6377 cut-off events. [2022-11-25 15:38:47,212 INFO L131 PetriNetUnfolder]: For 21491/21583 co-relation queries the response was YES. [2022-11-25 15:38:47,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25877 conditions, 6377 events. 4255/6377 cut-off events. For 21491/21583 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34812 event pairs, 316 based on Foata normal form. 79/6052 useless extension candidates. Maximal degree in co-relation 25845. Up to 1536 conditions per place. [2022-11-25 15:38:47,267 INFO L137 encePairwiseOnDemand]: 615/631 looper letters, 243 selfloop transitions, 128 changer transitions 9/381 dead transitions. [2022-11-25 15:38:47,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 381 transitions, 3690 flow [2022-11-25 15:38:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:38:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:38:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3813 transitions. [2022-11-25 15:38:47,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4028526148969889 [2022-11-25 15:38:47,276 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3813 transitions. [2022-11-25 15:38:47,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3813 transitions. [2022-11-25 15:38:47,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:47,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3813 transitions. [2022-11-25 15:38:47,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 254.2) internal successors, (3813), 15 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:47,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 631.0) internal successors, (10096), 16 states have internal predecessors, (10096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:47,300 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 631.0) internal successors, (10096), 16 states have internal predecessors, (10096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:47,301 INFO L175 Difference]: Start difference. First operand has 97 places, 123 transitions, 1206 flow. Second operand 15 states and 3813 transitions. [2022-11-25 15:38:47,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 381 transitions, 3690 flow [2022-11-25 15:38:47,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 381 transitions, 3638 flow, removed 26 selfloop flow, removed 0 redundant places. [2022-11-25 15:38:47,465 INFO L231 Difference]: Finished difference. Result has 123 places, 199 transitions, 2546 flow [2022-11-25 15:38:47,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2546, PETRI_PLACES=123, PETRI_TRANSITIONS=199} [2022-11-25 15:38:47,466 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2022-11-25 15:38:47,466 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 199 transitions, 2546 flow [2022-11-25 15:38:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:47,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:47,468 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] [2022-11-25 15:38:47,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:47,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:47,675 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)] === [2022-11-25 15:38:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash -345531507, now seen corresponding path program 2 times [2022-11-25 15:38:47,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:47,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998888155] [2022-11-25 15:38:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:47,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:47,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998888155] [2022-11-25 15:38:47,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998888155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959082521] [2022-11-25 15:38:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:38:47,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:47,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:47,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:47,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:38:48,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:38:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:48,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 15:38:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:48,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:48,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 84 [2022-11-25 15:38:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:48,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:48,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959082521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:48,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:38:48,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-11-25 15:38:48,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112039872] [2022-11-25 15:38:48,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:48,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:38:48,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:48,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:38:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:38:49,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 631 [2022-11-25 15:38:49,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 199 transitions, 2546 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:49,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:49,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 631 [2022-11-25 15:38:49,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:51,774 INFO L130 PetriNetUnfolder]: 5417/8066 cut-off events. [2022-11-25 15:38:51,774 INFO L131 PetriNetUnfolder]: For 45059/45132 co-relation queries the response was YES. [2022-11-25 15:38:51,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37211 conditions, 8066 events. 5417/8066 cut-off events. For 45059/45132 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 45135 event pairs, 661 based on Foata normal form. 127/7653 useless extension candidates. Maximal degree in co-relation 37166. Up to 3393 conditions per place. [2022-11-25 15:38:51,856 INFO L137 encePairwiseOnDemand]: 616/631 looper letters, 224 selfloop transitions, 158 changer transitions 14/397 dead transitions. [2022-11-25 15:38:51,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 397 transitions, 5155 flow [2022-11-25 15:38:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:38:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:38:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3669 transitions. [2022-11-25 15:38:51,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41532714512112295 [2022-11-25 15:38:51,868 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3669 transitions. [2022-11-25 15:38:51,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3669 transitions. [2022-11-25 15:38:51,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:51,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3669 transitions. [2022-11-25 15:38:51,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 262.07142857142856) internal successors, (3669), 14 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:51,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 631.0) internal successors, (9465), 15 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:51,898 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 631.0) internal successors, (9465), 15 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:51,898 INFO L175 Difference]: Start difference. First operand has 123 places, 199 transitions, 2546 flow. Second operand 14 states and 3669 transitions. [2022-11-25 15:38:51,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 397 transitions, 5155 flow [2022-11-25 15:38:52,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 397 transitions, 5026 flow, removed 64 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:52,475 INFO L231 Difference]: Finished difference. Result has 145 places, 277 transitions, 4129 flow [2022-11-25 15:38:52,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4129, PETRI_PLACES=145, PETRI_TRANSITIONS=277} [2022-11-25 15:38:52,476 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 107 predicate places. [2022-11-25 15:38:52,476 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 277 transitions, 4129 flow [2022-11-25 15:38:52,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:52,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:52,478 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] [2022-11-25 15:38:52,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:52,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 15:38:52,684 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)] === [2022-11-25 15:38:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash -850132925, now seen corresponding path program 2 times [2022-11-25 15:38:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:52,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945351933] [2022-11-25 15:38:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:52,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:52,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945351933] [2022-11-25 15:38:52,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945351933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:52,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577043788] [2022-11-25 15:38:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:38:52,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:52,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:52,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:52,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:38:53,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:38:53,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 15:38:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:53,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:53,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577043788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:53,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:38:53,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 15 [2022-11-25 15:38:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382726411] [2022-11-25 15:38:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:53,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:38:53,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:38:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:38:54,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 631 [2022-11-25 15:38:54,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 277 transitions, 4129 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:54,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:54,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 631 [2022-11-25 15:38:54,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:57,808 INFO L130 PetriNetUnfolder]: 7604/11154 cut-off events. [2022-11-25 15:38:57,808 INFO L131 PetriNetUnfolder]: For 82517/82606 co-relation queries the response was YES. [2022-11-25 15:38:57,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57720 conditions, 11154 events. 7604/11154 cut-off events. For 82517/82606 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 63562 event pairs, 1345 based on Foata normal form. 151/10550 useless extension candidates. Maximal degree in co-relation 57665. Up to 6126 conditions per place. [2022-11-25 15:38:57,903 INFO L137 encePairwiseOnDemand]: 616/631 looper letters, 328 selfloop transitions, 191 changer transitions 11/531 dead transitions. [2022-11-25 15:38:57,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 531 transitions, 7865 flow [2022-11-25 15:38:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:38:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 15:38:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3440 transitions. [2022-11-25 15:38:57,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4193587711812751 [2022-11-25 15:38:57,913 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3440 transitions. [2022-11-25 15:38:57,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3440 transitions. [2022-11-25 15:38:57,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:57,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3440 transitions. [2022-11-25 15:38:57,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 264.61538461538464) internal successors, (3440), 13 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:57,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:57,930 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:57,931 INFO L175 Difference]: Start difference. First operand has 145 places, 277 transitions, 4129 flow. Second operand 13 states and 3440 transitions. [2022-11-25 15:38:57,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 531 transitions, 7865 flow [2022-11-25 15:38:58,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 531 transitions, 7531 flow, removed 110 selfloop flow, removed 4 redundant places. [2022-11-25 15:38:58,655 INFO L231 Difference]: Finished difference. Result has 161 places, 376 transitions, 6107 flow [2022-11-25 15:38:58,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6107, PETRI_PLACES=161, PETRI_TRANSITIONS=376} [2022-11-25 15:38:58,655 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2022-11-25 15:38:58,656 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 376 transitions, 6107 flow [2022-11-25 15:38:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:58,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:58,656 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] [2022-11-25 15:38:58,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 15:38:58,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:58,857 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)] === [2022-11-25 15:38:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1084241883, now seen corresponding path program 3 times [2022-11-25 15:38:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:58,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197171383] [2022-11-25 15:38:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:59,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197171383] [2022-11-25 15:38:59,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197171383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885410308] [2022-11-25 15:38:59,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:38:59,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:59,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:59,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:59,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:38:59,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 15:38:59,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:59,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 15:38:59,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:59,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:59,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2022-11-25 15:39:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:39:00,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:39:00,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885410308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:00,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:39:00,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-11-25 15:39:00,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861457951] [2022-11-25 15:39:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:00,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:39:00,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:39:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:39:00,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 631 [2022-11-25 15:39:00,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 376 transitions, 6107 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:00,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:00,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 631 [2022-11-25 15:39:00,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:03,808 INFO L130 PetriNetUnfolder]: 7536/11031 cut-off events. [2022-11-25 15:39:03,808 INFO L131 PetriNetUnfolder]: For 99048/99109 co-relation queries the response was YES. [2022-11-25 15:39:03,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60599 conditions, 11031 events. 7536/11031 cut-off events. For 99048/99109 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 62377 event pairs, 1125 based on Foata normal form. 68/10364 useless extension candidates. Maximal degree in co-relation 60538. Up to 5056 conditions per place. [2022-11-25 15:39:04,117 INFO L137 encePairwiseOnDemand]: 616/631 looper letters, 277 selfloop transitions, 202 changer transitions 10/490 dead transitions. [2022-11-25 15:39:04,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 490 transitions, 7920 flow [2022-11-25 15:39:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:39:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:39:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3149 transitions. [2022-11-25 15:39:04,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4158742736397253 [2022-11-25 15:39:04,133 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3149 transitions. [2022-11-25 15:39:04,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3149 transitions. [2022-11-25 15:39:04,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:04,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3149 transitions. [2022-11-25 15:39:04,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 262.4166666666667) internal successors, (3149), 12 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:04,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 631.0) internal successors, (8203), 13 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:04,158 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 631.0) internal successors, (8203), 13 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:04,158 INFO L175 Difference]: Start difference. First operand has 161 places, 376 transitions, 6107 flow. Second operand 12 states and 3149 transitions. [2022-11-25 15:39:04,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 490 transitions, 7920 flow [2022-11-25 15:39:05,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 490 transitions, 7827 flow, removed 39 selfloop flow, removed 2 redundant places. [2022-11-25 15:39:05,044 INFO L231 Difference]: Finished difference. Result has 174 places, 381 transitions, 6586 flow [2022-11-25 15:39:05,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=6002, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6586, PETRI_PLACES=174, PETRI_TRANSITIONS=381} [2022-11-25 15:39:05,045 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2022-11-25 15:39:05,045 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 381 transitions, 6586 flow [2022-11-25 15:39:05,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:05,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:05,046 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] [2022-11-25 15:39:05,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 15:39:05,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:05,248 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)] === [2022-11-25 15:39:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1151123240, now seen corresponding path program 1 times [2022-11-25 15:39:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853539135] [2022-11-25 15:39:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:05,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:05,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853539135] [2022-11-25 15:39:05,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853539135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758383723] [2022-11-25 15:39:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:05,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:05,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:05,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:05,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:39:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 15:39:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:06,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:06,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:06,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 125 [2022-11-25 15:39:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:07,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758383723] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:07,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:39:07,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2022-11-25 15:39:07,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867530594] [2022-11-25 15:39:07,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:07,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:39:07,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:39:07,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:39:08,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 631 [2022-11-25 15:39:08,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 381 transitions, 6586 flow. Second operand has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:08,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:08,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 631 [2022-11-25 15:39:08,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:13,655 INFO L130 PetriNetUnfolder]: 9032/13352 cut-off events. [2022-11-25 15:39:13,655 INFO L131 PetriNetUnfolder]: For 139081/139098 co-relation queries the response was YES. [2022-11-25 15:39:13,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75840 conditions, 13352 events. 9032/13352 cut-off events. For 139081/139098 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 79472 event pairs, 2363 based on Foata normal form. 38/12494 useless extension candidates. Maximal degree in co-relation 75775. Up to 4899 conditions per place. [2022-11-25 15:39:13,794 INFO L137 encePairwiseOnDemand]: 617/631 looper letters, 368 selfloop transitions, 210 changer transitions 43/622 dead transitions. [2022-11-25 15:39:13,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 622 transitions, 10314 flow [2022-11-25 15:39:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:39:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 15:39:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4151 transitions. [2022-11-25 15:39:13,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4111529318541997 [2022-11-25 15:39:13,802 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4151 transitions. [2022-11-25 15:39:13,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4151 transitions. [2022-11-25 15:39:13,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:13,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4151 transitions. [2022-11-25 15:39:13,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 259.4375) internal successors, (4151), 16 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:13,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 631.0) internal successors, (10727), 17 states have internal predecessors, (10727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:13,821 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 631.0) internal successors, (10727), 17 states have internal predecessors, (10727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:13,822 INFO L175 Difference]: Start difference. First operand has 174 places, 381 transitions, 6586 flow. Second operand 16 states and 4151 transitions. [2022-11-25 15:39:13,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 622 transitions, 10314 flow [2022-11-25 15:39:14,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 622 transitions, 9849 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-11-25 15:39:14,935 INFO L231 Difference]: Finished difference. Result has 188 places, 432 transitions, 7628 flow [2022-11-25 15:39:14,935 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7628, PETRI_PLACES=188, PETRI_TRANSITIONS=432} [2022-11-25 15:39:14,936 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2022-11-25 15:39:14,936 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 432 transitions, 7628 flow [2022-11-25 15:39:14,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:14,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:14,937 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] [2022-11-25 15:39:14,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:15,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 15:39:15,146 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)] === [2022-11-25 15:39:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1475288261, now seen corresponding path program 3 times [2022-11-25 15:39:15,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:15,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345282571] [2022-11-25 15:39:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:15,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:15,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:15,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345282571] [2022-11-25 15:39:15,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345282571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790277585] [2022-11-25 15:39:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:39:15,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:15,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:15,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:15,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:39:15,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 15:39:15,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:39:15,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:16,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:16,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2022-11-25 15:39:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:39:16,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:39:16,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790277585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:16,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:39:16,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 14 [2022-11-25 15:39:16,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980975328] [2022-11-25 15:39:16,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:16,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:39:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:39:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:39:16,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 631 [2022-11-25 15:39:16,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 432 transitions, 7628 flow. Second operand has 11 states, 11 states have (on average 255.0909090909091) internal successors, (2806), 11 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:16,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:16,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 631 [2022-11-25 15:39:16,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:20,369 INFO L130 PetriNetUnfolder]: 8954/13221 cut-off events. [2022-11-25 15:39:20,369 INFO L131 PetriNetUnfolder]: For 154162/154260 co-relation queries the response was YES. [2022-11-25 15:39:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76228 conditions, 13221 events. 8954/13221 cut-off events. For 154162/154260 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 78485 event pairs, 1482 based on Foata normal form. 93/12444 useless extension candidates. Maximal degree in co-relation 76158. Up to 7248 conditions per place. [2022-11-25 15:39:20,516 INFO L137 encePairwiseOnDemand]: 618/631 looper letters, 352 selfloop transitions, 207 changer transitions 8/568 dead transitions. [2022-11-25 15:39:20,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 568 transitions, 9903 flow [2022-11-25 15:39:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:39:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:39:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3205 transitions. [2022-11-25 15:39:20,524 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.423269941891178 [2022-11-25 15:39:20,524 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3205 transitions. [2022-11-25 15:39:20,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3205 transitions. [2022-11-25 15:39:20,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:20,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3205 transitions. [2022-11-25 15:39:20,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 267.0833333333333) internal successors, (3205), 12 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:20,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 631.0) internal successors, (8203), 13 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:20,543 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 631.0) internal successors, (8203), 13 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:20,543 INFO L175 Difference]: Start difference. First operand has 188 places, 432 transitions, 7628 flow. Second operand 12 states and 3205 transitions. [2022-11-25 15:39:20,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 568 transitions, 9903 flow [2022-11-25 15:39:22,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 568 transitions, 9440 flow, removed 75 selfloop flow, removed 7 redundant places. [2022-11-25 15:39:22,162 INFO L231 Difference]: Finished difference. Result has 191 places, 430 transitions, 7587 flow [2022-11-25 15:39:22,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=7187, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7587, PETRI_PLACES=191, PETRI_TRANSITIONS=430} [2022-11-25 15:39:22,163 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 153 predicate places. [2022-11-25 15:39:22,163 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 430 transitions, 7587 flow [2022-11-25 15:39:22,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 255.0909090909091) internal successors, (2806), 11 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:22,164 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:22,164 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] [2022-11-25 15:39:22,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:22,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 15:39:22,365 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)] === [2022-11-25 15:39:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1270174342, now seen corresponding path program 2 times [2022-11-25 15:39:22,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:22,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38505000] [2022-11-25 15:39:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:22,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:23,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38505000] [2022-11-25 15:39:23,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38505000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133967025] [2022-11-25 15:39:23,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:39:23,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:23,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:23,107 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:23,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:39:23,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:39:23,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:23,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 15:39:23,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:39:23,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:39:23,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133967025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:23,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:39:23,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2022-11-25 15:39:23,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878804262] [2022-11-25 15:39:23,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:23,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:39:23,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:23,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:39:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:39:24,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 631 [2022-11-25 15:39:24,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 430 transitions, 7587 flow. Second operand has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:24,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:24,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 631 [2022-11-25 15:39:24,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:27,924 INFO L130 PetriNetUnfolder]: 9084/13445 cut-off events. [2022-11-25 15:39:27,924 INFO L131 PetriNetUnfolder]: For 149255/149279 co-relation queries the response was YES. [2022-11-25 15:39:27,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75506 conditions, 13445 events. 9084/13445 cut-off events. For 149255/149279 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 80511 event pairs, 2060 based on Foata normal form. 87/12644 useless extension candidates. Maximal degree in co-relation 75438. Up to 5862 conditions per place. [2022-11-25 15:39:28,043 INFO L137 encePairwiseOnDemand]: 619/631 looper letters, 298 selfloop transitions, 240 changer transitions 20/559 dead transitions. [2022-11-25 15:39:28,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 559 transitions, 10176 flow [2022-11-25 15:39:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:39:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:39:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2423 transitions. [2022-11-25 15:39:28,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42665962317309386 [2022-11-25 15:39:28,048 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2423 transitions. [2022-11-25 15:39:28,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2423 transitions. [2022-11-25 15:39:28,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:28,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2423 transitions. [2022-11-25 15:39:28,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 269.22222222222223) internal successors, (2423), 9 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:28,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:28,059 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:28,059 INFO L175 Difference]: Start difference. First operand has 191 places, 430 transitions, 7587 flow. Second operand 9 states and 2423 transitions. [2022-11-25 15:39:28,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 559 transitions, 10176 flow [2022-11-25 15:39:29,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 559 transitions, 9640 flow, removed 25 selfloop flow, removed 11 redundant places. [2022-11-25 15:39:29,538 INFO L231 Difference]: Finished difference. Result has 193 places, 455 transitions, 8357 flow [2022-11-25 15:39:29,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=7046, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8357, PETRI_PLACES=193, PETRI_TRANSITIONS=455} [2022-11-25 15:39:29,539 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 155 predicate places. [2022-11-25 15:39:29,539 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 455 transitions, 8357 flow [2022-11-25 15:39:29,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:29,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:29,539 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:29,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:29,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 15:39:29,740 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)] === [2022-11-25 15:39:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:29,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1021922216, now seen corresponding path program 3 times [2022-11-25 15:39:29,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:29,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046571179] [2022-11-25 15:39:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:29,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046571179] [2022-11-25 15:39:30,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046571179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173732177] [2022-11-25 15:39:30,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:39:30,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:30,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:30,555 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:30,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:39:30,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 15:39:30,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 15:39:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:39:31,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:39:31,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173732177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:31,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:39:31,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2022-11-25 15:39:31,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549582528] [2022-11-25 15:39:31,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:31,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:39:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:39:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:39:31,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 631 [2022-11-25 15:39:31,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 455 transitions, 8357 flow. Second operand has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:31,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:31,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 631 [2022-11-25 15:39:31,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:35,267 INFO L130 PetriNetUnfolder]: 8944/13322 cut-off events. [2022-11-25 15:39:35,267 INFO L131 PetriNetUnfolder]: For 162587/162603 co-relation queries the response was YES. [2022-11-25 15:39:35,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78316 conditions, 13322 events. 8944/13322 cut-off events. For 162587/162603 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 80495 event pairs, 2251 based on Foata normal form. 123/12557 useless extension candidates. Maximal degree in co-relation 78244. Up to 6363 conditions per place. [2022-11-25 15:39:35,420 INFO L137 encePairwiseOnDemand]: 619/631 looper letters, 298 selfloop transitions, 226 changer transitions 28/553 dead transitions. [2022-11-25 15:39:35,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 553 transitions, 10451 flow [2022-11-25 15:39:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:39:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:39:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2423 transitions. [2022-11-25 15:39:35,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42665962317309386 [2022-11-25 15:39:35,424 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2423 transitions. [2022-11-25 15:39:35,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2423 transitions. [2022-11-25 15:39:35,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:35,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2423 transitions. [2022-11-25 15:39:35,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 269.22222222222223) internal successors, (2423), 9 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:35,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:35,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:35,436 INFO L175 Difference]: Start difference. First operand has 193 places, 455 transitions, 8357 flow. Second operand 9 states and 2423 transitions. [2022-11-25 15:39:35,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 553 transitions, 10451 flow [2022-11-25 15:39:37,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 553 transitions, 9925 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-25 15:39:37,148 INFO L231 Difference]: Finished difference. Result has 201 places, 459 transitions, 8643 flow [2022-11-25 15:39:37,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=7845, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8643, PETRI_PLACES=201, PETRI_TRANSITIONS=459} [2022-11-25 15:39:37,149 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 163 predicate places. [2022-11-25 15:39:37,149 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 459 transitions, 8643 flow [2022-11-25 15:39:37,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:37,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:37,150 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] [2022-11-25 15:39:37,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 15:39:37,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 15:39:37,360 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)] === [2022-11-25 15:39:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:37,361 INFO L85 PathProgramCache]: Analyzing trace with hash -925450736, now seen corresponding path program 4 times [2022-11-25 15:39:37,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:37,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304852248] [2022-11-25 15:39:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:37,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:37,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304852248] [2022-11-25 15:39:37,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304852248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788150294] [2022-11-25 15:39:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:39:37,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:37,967 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:37,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:39:38,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:39:38,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 15:39:38,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:38,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:39,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:39,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 125 [2022-11-25 15:39:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:40,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788150294] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:40,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:39:40,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2022-11-25 15:39:40,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565356745] [2022-11-25 15:39:40,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:40,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:39:40,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:39:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:39:41,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 631 [2022-11-25 15:39:41,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 459 transitions, 8643 flow. Second operand has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:41,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:41,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 631 [2022-11-25 15:39:41,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:46,124 INFO L130 PetriNetUnfolder]: 8908/13258 cut-off events. [2022-11-25 15:39:46,124 INFO L131 PetriNetUnfolder]: For 185569/185573 co-relation queries the response was YES. [2022-11-25 15:39:46,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80596 conditions, 13258 events. 8908/13258 cut-off events. For 185569/185573 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 80085 event pairs, 2418 based on Foata normal form. 43/12350 useless extension candidates. Maximal degree in co-relation 80520. Up to 4899 conditions per place. [2022-11-25 15:39:46,537 INFO L137 encePairwiseOnDemand]: 617/631 looper letters, 381 selfloop transitions, 224 changer transitions 20/626 dead transitions. [2022-11-25 15:39:46,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 626 transitions, 11184 flow [2022-11-25 15:39:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:39:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 15:39:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4146 transitions. [2022-11-25 15:39:46,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4106576862123613 [2022-11-25 15:39:46,543 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4146 transitions. [2022-11-25 15:39:46,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4146 transitions. [2022-11-25 15:39:46,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:46,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4146 transitions. [2022-11-25 15:39:46,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 259.125) internal successors, (4146), 16 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:46,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 631.0) internal successors, (10727), 17 states have internal predecessors, (10727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:46,564 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 631.0) internal successors, (10727), 17 states have internal predecessors, (10727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:46,564 INFO L175 Difference]: Start difference. First operand has 201 places, 459 transitions, 8643 flow. Second operand 16 states and 4146 transitions. [2022-11-25 15:39:46,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 626 transitions, 11184 flow [2022-11-25 15:39:48,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 626 transitions, 10667 flow, removed 30 selfloop flow, removed 7 redundant places. [2022-11-25 15:39:48,340 INFO L231 Difference]: Finished difference. Result has 212 places, 467 transitions, 8775 flow [2022-11-25 15:39:48,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=8153, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8775, PETRI_PLACES=212, PETRI_TRANSITIONS=467} [2022-11-25 15:39:48,341 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 174 predicate places. [2022-11-25 15:39:48,341 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 467 transitions, 8775 flow [2022-11-25 15:39:48,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:48,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:48,342 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] [2022-11-25 15:39:48,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 15:39:48,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 15:39:48,548 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:39:48,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash -102949315, now seen corresponding path program 4 times [2022-11-25 15:39:48,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:48,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494287324] [2022-11-25 15:39:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:48,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:48,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494287324] [2022-11-25 15:39:48,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494287324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:48,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900255812] [2022-11-25 15:39:48,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:39:48,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:48,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:48,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:39:48,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:39:48,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 15:39:48,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:49,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:49,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 84 [2022-11-25 15:39:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:49,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:49,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:49,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 125 [2022-11-25 15:39:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:39:50,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900255812] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:50,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:39:50,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-11-25 15:39:50,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522634760] [2022-11-25 15:39:50,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:50,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:39:50,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:39:50,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:39:51,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 631 [2022-11-25 15:39:51,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 467 transitions, 8775 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:51,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:51,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 631 [2022-11-25 15:39:51,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:56,477 INFO L130 PetriNetUnfolder]: 9857/14645 cut-off events. [2022-11-25 15:39:56,477 INFO L131 PetriNetUnfolder]: For 202435/202545 co-relation queries the response was YES. [2022-11-25 15:39:56,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89076 conditions, 14645 events. 9857/14645 cut-off events. For 202435/202545 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 89529 event pairs, 1112 based on Foata normal form. 108/13743 useless extension candidates. Maximal degree in co-relation 88999. Up to 4186 conditions per place. [2022-11-25 15:39:56,629 INFO L137 encePairwiseOnDemand]: 617/631 looper letters, 459 selfloop transitions, 225 changer transitions 17/702 dead transitions. [2022-11-25 15:39:56,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 702 transitions, 12964 flow [2022-11-25 15:39:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:39:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 15:39:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3282 transitions. [2022-11-25 15:39:56,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40009752529562354 [2022-11-25 15:39:56,636 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3282 transitions. [2022-11-25 15:39:56,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3282 transitions. [2022-11-25 15:39:56,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:56,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3282 transitions. [2022-11-25 15:39:56,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 252.46153846153845) internal successors, (3282), 13 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:56,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:56,654 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:56,654 INFO L175 Difference]: Start difference. First operand has 212 places, 467 transitions, 8775 flow. Second operand 13 states and 3282 transitions. [2022-11-25 15:39:56,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 702 transitions, 12964 flow [2022-11-25 15:39:58,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 702 transitions, 12607 flow, removed 73 selfloop flow, removed 7 redundant places. [2022-11-25 15:39:58,838 INFO L231 Difference]: Finished difference. Result has 221 places, 503 transitions, 9898 flow [2022-11-25 15:39:58,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=8528, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9898, PETRI_PLACES=221, PETRI_TRANSITIONS=503} [2022-11-25 15:39:58,839 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 183 predicate places. [2022-11-25 15:39:58,839 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 503 transitions, 9898 flow [2022-11-25 15:39:58,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:58,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:58,840 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] [2022-11-25 15:39:58,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:59,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 15:39:59,043 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:39:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2017527722, now seen corresponding path program 5 times [2022-11-25 15:39:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:59,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251290858] [2022-11-25 15:39:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:59,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:59,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:59,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251290858] [2022-11-25 15:39:59,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251290858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:59,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799240492] [2022-11-25 15:39:59,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:39:59,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:59,804 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:59,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:39:59,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:39:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:59,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 15:39:59,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:00,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:00,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:00,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 125 [2022-11-25 15:40:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:02,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799240492] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:02,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:40:02,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2022-11-25 15:40:02,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321126567] [2022-11-25 15:40:02,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:40:02,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:40:02,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:40:02,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:40:03,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 631 [2022-11-25 15:40:03,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 503 transitions, 9898 flow. Second operand has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:03,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:03,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 631 [2022-11-25 15:40:03,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:10,010 INFO L130 PetriNetUnfolder]: 9824/14626 cut-off events. [2022-11-25 15:40:10,010 INFO L131 PetriNetUnfolder]: For 254760/254785 co-relation queries the response was YES. [2022-11-25 15:40:10,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94691 conditions, 14626 events. 9824/14626 cut-off events. For 254760/254785 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 89787 event pairs, 2643 based on Foata normal form. 4/13588 useless extension candidates. Maximal degree in co-relation 94610. Up to 5460 conditions per place. [2022-11-25 15:40:10,179 INFO L137 encePairwiseOnDemand]: 618/631 looper letters, 401 selfloop transitions, 253 changer transitions 23/678 dead transitions. [2022-11-25 15:40:10,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 678 transitions, 12749 flow [2022-11-25 15:40:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:40:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 15:40:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4405 transitions. [2022-11-25 15:40:10,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41064603337372985 [2022-11-25 15:40:10,187 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4405 transitions. [2022-11-25 15:40:10,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4405 transitions. [2022-11-25 15:40:10,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:10,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4405 transitions. [2022-11-25 15:40:10,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 259.11764705882354) internal successors, (4405), 17 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:10,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 631.0) internal successors, (11358), 18 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:10,208 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 631.0) internal successors, (11358), 18 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:10,208 INFO L175 Difference]: Start difference. First operand has 221 places, 503 transitions, 9898 flow. Second operand 17 states and 4405 transitions. [2022-11-25 15:40:10,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 678 transitions, 12749 flow [2022-11-25 15:40:13,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 678 transitions, 12307 flow, removed 43 selfloop flow, removed 8 redundant places. [2022-11-25 15:40:13,218 INFO L231 Difference]: Finished difference. Result has 230 places, 501 transitions, 10006 flow [2022-11-25 15:40:13,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=9523, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10006, PETRI_PLACES=230, PETRI_TRANSITIONS=501} [2022-11-25 15:40:13,219 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 192 predicate places. [2022-11-25 15:40:13,219 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 501 transitions, 10006 flow [2022-11-25 15:40:13,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:13,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:13,220 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] [2022-11-25 15:40:13,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:13,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:13,420 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:40:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:13,421 INFO L85 PathProgramCache]: Analyzing trace with hash 451163285, now seen corresponding path program 5 times [2022-11-25 15:40:13,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:13,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668734253] [2022-11-25 15:40:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:13,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:13,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:13,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668734253] [2022-11-25 15:40:13,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668734253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:13,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325692800] [2022-11-25 15:40:13,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:40:13,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:13,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:13,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:13,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:40:13,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:40:13,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:40:13,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 15:40:13,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:14,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:14,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2022-11-25 15:40:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:14,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:14,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:14,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 125 [2022-11-25 15:40:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:40:15,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325692800] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:15,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:40:15,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-11-25 15:40:15,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546754133] [2022-11-25 15:40:15,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:40:15,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:40:15,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:15,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:40:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:40:16,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 631 [2022-11-25 15:40:16,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 501 transitions, 10006 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:16,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:16,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 631 [2022-11-25 15:40:16,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:21,826 INFO L130 PetriNetUnfolder]: 9835/14643 cut-off events. [2022-11-25 15:40:21,826 INFO L131 PetriNetUnfolder]: For 234254/234376 co-relation queries the response was YES. [2022-11-25 15:40:21,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94470 conditions, 14643 events. 9835/14643 cut-off events. For 234254/234376 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 90254 event pairs, 1056 based on Foata normal form. 117/13738 useless extension candidates. Maximal degree in co-relation 94389. Up to 4158 conditions per place. [2022-11-25 15:40:22,032 INFO L137 encePairwiseOnDemand]: 617/631 looper letters, 454 selfloop transitions, 232 changer transitions 12/699 dead transitions. [2022-11-25 15:40:22,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 699 transitions, 13503 flow [2022-11-25 15:40:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:40:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 15:40:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3285 transitions. [2022-11-25 15:40:22,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4004632451542119 [2022-11-25 15:40:22,038 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3285 transitions. [2022-11-25 15:40:22,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3285 transitions. [2022-11-25 15:40:22,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:22,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3285 transitions. [2022-11-25 15:40:22,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 252.69230769230768) internal successors, (3285), 13 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:22,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:22,053 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:22,053 INFO L175 Difference]: Start difference. First operand has 230 places, 501 transitions, 10006 flow. Second operand 13 states and 3285 transitions. [2022-11-25 15:40:22,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 699 transitions, 13503 flow [2022-11-25 15:40:24,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 699 transitions, 13129 flow, removed 31 selfloop flow, removed 12 redundant places. [2022-11-25 15:40:24,951 INFO L231 Difference]: Finished difference. Result has 232 places, 509 transitions, 10368 flow [2022-11-25 15:40:24,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=9698, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10368, PETRI_PLACES=232, PETRI_TRANSITIONS=509} [2022-11-25 15:40:24,952 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 194 predicate places. [2022-11-25 15:40:24,952 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 509 transitions, 10368 flow [2022-11-25 15:40:24,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:24,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:24,952 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] [2022-11-25 15:40:24,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:25,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:25,153 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:40:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash -559805107, now seen corresponding path program 6 times [2022-11-25 15:40:25,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:25,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467929829] [2022-11-25 15:40:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:25,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:25,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:25,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467929829] [2022-11-25 15:40:25,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467929829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:25,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268558892] [2022-11-25 15:40:25,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:40:25,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:25,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:25,419 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:25,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:40:25,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 15:40:25,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:40:25,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 15:40:25,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:26,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:26,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 81 [2022-11-25 15:40:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:40:26,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:40:26,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268558892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:40:26,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:40:26,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-11-25 15:40:26,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902132393] [2022-11-25 15:40:26,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:40:26,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:40:26,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:40:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:40:27,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 631 [2022-11-25 15:40:27,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 509 transitions, 10368 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:27,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:27,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 631 [2022-11-25 15:40:27,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:31,776 INFO L130 PetriNetUnfolder]: 9713/14525 cut-off events. [2022-11-25 15:40:31,776 INFO L131 PetriNetUnfolder]: For 231688/231801 co-relation queries the response was YES. [2022-11-25 15:40:31,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94889 conditions, 14525 events. 9713/14525 cut-off events. For 231688/231801 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 90263 event pairs, 1470 based on Foata normal form. 141/13614 useless extension candidates. Maximal degree in co-relation 94807. Up to 6870 conditions per place. [2022-11-25 15:40:31,954 INFO L137 encePairwiseOnDemand]: 616/631 looper letters, 344 selfloop transitions, 277 changer transitions 10/632 dead transitions. [2022-11-25 15:40:31,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 632 transitions, 12772 flow [2022-11-25 15:40:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:40:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 15:40:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3410 transitions. [2022-11-25 15:40:31,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4157015725953919 [2022-11-25 15:40:31,959 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3410 transitions. [2022-11-25 15:40:31,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3410 transitions. [2022-11-25 15:40:31,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:31,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3410 transitions. [2022-11-25 15:40:31,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 262.3076923076923) internal successors, (3410), 13 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:31,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:31,971 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 631.0) internal successors, (8834), 14 states have internal predecessors, (8834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:31,971 INFO L175 Difference]: Start difference. First operand has 232 places, 509 transitions, 10368 flow. Second operand 13 states and 3410 transitions. [2022-11-25 15:40:31,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 632 transitions, 12772 flow [2022-11-25 15:40:34,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 632 transitions, 12287 flow, removed 9 selfloop flow, removed 11 redundant places. [2022-11-25 15:40:34,973 INFO L231 Difference]: Finished difference. Result has 237 places, 518 transitions, 10750 flow [2022-11-25 15:40:34,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=9840, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10750, PETRI_PLACES=237, PETRI_TRANSITIONS=518} [2022-11-25 15:40:34,974 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 199 predicate places. [2022-11-25 15:40:34,974 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 518 transitions, 10750 flow [2022-11-25 15:40:34,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:34,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:34,975 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] [2022-11-25 15:40:34,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:35,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 15:40:35,176 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:40:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1039397665, now seen corresponding path program 7 times [2022-11-25 15:40:35,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:35,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480512114] [2022-11-25 15:40:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:35,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:35,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480512114] [2022-11-25 15:40:35,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480512114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:35,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380279626] [2022-11-25 15:40:35,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:40:35,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:35,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:35,439 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:35,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a26d864e-e78b-4829-96b0-87f7046e88d5/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 15:40:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 15:40:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:35,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:36,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:36,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 125 [2022-11-25 15:40:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:40:37,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380279626] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:37,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:40:37,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-11-25 15:40:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950641113] [2022-11-25 15:40:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:40:37,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:40:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:40:37,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:40:37,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 631 [2022-11-25 15:40:37,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 518 transitions, 10750 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:37,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:37,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 631 [2022-11-25 15:40:37,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:42,786 INFO L130 PetriNetUnfolder]: 9780/14698 cut-off events. [2022-11-25 15:40:42,787 INFO L131 PetriNetUnfolder]: For 239625/239759 co-relation queries the response was YES. [2022-11-25 15:40:42,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97343 conditions, 14698 events. 9780/14698 cut-off events. For 239625/239759 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 92411 event pairs, 1232 based on Foata normal form. 129/13801 useless extension candidates. Maximal degree in co-relation 97258. Up to 4079 conditions per place. [2022-11-25 15:40:42,966 INFO L137 encePairwiseOnDemand]: 617/631 looper letters, 372 selfloop transitions, 320 changer transitions 24/717 dead transitions. [2022-11-25 15:40:42,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 717 transitions, 14242 flow [2022-11-25 15:40:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:40:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:40:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3546 transitions. [2022-11-25 15:40:42,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4014036676477247 [2022-11-25 15:40:42,971 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3546 transitions. [2022-11-25 15:40:42,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3546 transitions. [2022-11-25 15:40:42,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:42,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3546 transitions. [2022-11-25 15:40:42,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 253.28571428571428) internal successors, (3546), 14 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:42,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 631.0) internal successors, (9465), 15 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:42,981 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 631.0) internal successors, (9465), 15 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:42,981 INFO L175 Difference]: Start difference. First operand has 237 places, 518 transitions, 10750 flow. Second operand 14 states and 3546 transitions. [2022-11-25 15:40:42,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 717 transitions, 14242 flow