./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN --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 e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d --- 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-6b4ec56 [2022-11-20 10:55:04,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:55:04,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:55:04,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:55:04,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:55:04,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:55:04,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:55:04,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:55:04,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:55:04,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:55:04,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:55:04,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:55:04,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:55:04,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:55:04,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:55:04,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:55:04,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:55:04,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:55:04,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:55:04,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:55:04,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:55:04,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:55:04,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:55:04,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:55:04,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:55:04,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:55:04,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:55:04,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:55:04,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:55:04,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:55:04,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:55:04,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:55:04,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:55:04,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:55:04,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:55:04,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:55:04,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:55:04,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:55:04,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:55:04,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:55:04,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:55:04,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:55:04,952 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:55:04,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:55:04,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:55:04,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:55:04,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:55:04,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:55:04,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:55:04,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:55:04,956 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:55:04,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:55:04,956 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:55:04,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:55:04,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:55:04,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:55:04,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:55:04,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:55:04,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:55:04,958 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:55:04,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:55:04,959 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:55:04,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:55:04,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:55:04,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:55:04,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:55:04,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:55:04,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:55:04,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:55:04,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:55:04,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:55:04,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:55:04,962 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:55:04,962 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:55:04,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:55:04,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d [2022-11-20 10:55:05,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:55:05,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:55:05,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:55:05,261 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:55:05,261 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:55:05,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2022-11-20 10:55:08,403 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:55:08,697 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:55:08,698 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2022-11-20 10:55:08,707 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/data/15bdc7e22/f9be75802f954c7689dfb74fad5d292f/FLAG05121f540 [2022-11-20 10:55:08,725 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/data/15bdc7e22/f9be75802f954c7689dfb74fad5d292f [2022-11-20 10:55:08,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:55:08,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:55:08,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:55:08,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:55:08,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:55:08,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:55:08" (1/1) ... [2022-11-20 10:55:08,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3bfe76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:08, skipping insertion in model container [2022-11-20 10:55:08,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:55:08" (1/1) ... [2022-11-20 10:55:08,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:55:08,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:55:09,024 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_deb3e09a-3c3e-43a3-a040-171060fffe83/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2022-11-20 10:55:09,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:55:09,047 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:55:09,075 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_deb3e09a-3c3e-43a3-a040-171060fffe83/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2022-11-20 10:55:09,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:55:09,096 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:55:09,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09 WrapperNode [2022-11-20 10:55:09,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:55:09,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:55:09,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:55:09,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:55:09,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,169 INFO L138 Inliner]: procedures = 28, calls = 74, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 362 [2022-11-20 10:55:09,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:55:09,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:55:09,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:55:09,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:55:09,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,205 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:55:09,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:55:09,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:55:09,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:55:09,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (1/1) ... [2022-11-20 10:55:09,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:55:09,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:09,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:55:09,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:55:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:55:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 10:55:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:55:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:55:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:55:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 10:55:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:55:09,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:55:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:55:09,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:55:09,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 10:55:09,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 10:55:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:55:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:55:09,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:55:09,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:55:09,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:55:09,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:55:09,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:55:09,332 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:55:09,480 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:55:09,497 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:55:10,121 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:55:10,319 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:55:10,320 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-20 10:55:10,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:55:10 BoogieIcfgContainer [2022-11-20 10:55:10,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:55:10,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:55:10,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:55:10,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:55:10,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:55:08" (1/3) ... [2022-11-20 10:55:10,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f139523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:55:10, skipping insertion in model container [2022-11-20 10:55:10,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:09" (2/3) ... [2022-11-20 10:55:10,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f139523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:55:10, skipping insertion in model container [2022-11-20 10:55:10,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:55:10" (3/3) ... [2022-11-20 10:55:10,346 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product-alt.wvr.c [2022-11-20 10:55:10,358 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:55:10,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:55:10,366 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:55:10,366 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:55:10,505 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:55:10,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 352 transitions, 728 flow [2022-11-20 10:55:10,712 INFO L130 PetriNetUnfolder]: 35/349 cut-off events. [2022-11-20 10:55:10,712 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:55:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 349 events. 35/349 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 668 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 280. Up to 2 conditions per place. [2022-11-20 10:55:10,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 352 transitions, 728 flow [2022-11-20 10:55:10,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 338 transitions, 694 flow [2022-11-20 10:55:10,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:55:10,765 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;@70fb0732, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:55:10,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 10:55:10,872 INFO L130 PetriNetUnfolder]: 35/337 cut-off events. [2022-11-20 10:55:10,873 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:55:10,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:10,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:10,876 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)] === [2022-11-20 10:55:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1760372727, now seen corresponding path program 1 times [2022-11-20 10:55:10,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:10,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021809739] [2022-11-20 10:55:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:10,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:11,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021809739] [2022-11-20 10:55:11,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021809739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:11,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:11,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:55:11,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662903486] [2022-11-20 10:55:11,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:11,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:55:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:11,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:55:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:55:11,337 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 352 [2022-11-20 10:55:11,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 338 transitions, 694 flow. Second operand has 2 states, 2 states have (on average 329.0) internal successors, (658), 2 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:11,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:11,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 352 [2022-11-20 10:55:11,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:11,528 INFO L130 PetriNetUnfolder]: 47/520 cut-off events. [2022-11-20 10:55:11,529 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-20 10:55:11,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 520 events. 47/520 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1713 event pairs, 15 based on Foata normal form. 50/514 useless extension candidates. Maximal degree in co-relation 351. Up to 37 conditions per place. [2022-11-20 10:55:11,558 INFO L137 encePairwiseOnDemand]: 333/352 looper letters, 9 selfloop transitions, 0 changer transitions 9/319 dead transitions. [2022-11-20 10:55:11,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 319 transitions, 674 flow [2022-11-20 10:55:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:55:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:55:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 674 transitions. [2022-11-20 10:55:11,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9573863636363636 [2022-11-20 10:55:11,594 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 674 transitions. [2022-11-20 10:55:11,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 674 transitions. [2022-11-20 10:55:11,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:11,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 674 transitions. [2022-11-20 10:55:11,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 337.0) internal successors, (674), 2 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:11,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:11,619 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:11,621 INFO L175 Difference]: Start difference. First operand has 313 places, 338 transitions, 694 flow. Second operand 2 states and 674 transitions. [2022-11-20 10:55:11,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 319 transitions, 674 flow [2022-11-20 10:55:11,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 319 transitions, 662 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 10:55:11,638 INFO L231 Difference]: Finished difference. Result has 308 places, 310 transitions, 626 flow [2022-11-20 10:55:11,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=626, PETRI_PLACES=308, PETRI_TRANSITIONS=310} [2022-11-20 10:55:11,647 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, -5 predicate places. [2022-11-20 10:55:11,648 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 310 transitions, 626 flow [2022-11-20 10:55:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 329.0) internal successors, (658), 2 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:11,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:11,649 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:11,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:55:11,650 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)] === [2022-11-20 10:55:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1761397245, now seen corresponding path program 1 times [2022-11-20 10:55:11,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:11,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947969340] [2022-11-20 10:55:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:11,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:12,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:12,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947969340] [2022-11-20 10:55:12,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947969340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:12,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:12,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:55:12,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665579467] [2022-11-20 10:55:12,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:12,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:55:12,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:55:12,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:55:12,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 352 [2022-11-20 10:55:12,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 310 transitions, 626 flow. Second operand has 6 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:12,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:12,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 352 [2022-11-20 10:55:12,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:12,848 INFO L130 PetriNetUnfolder]: 114/992 cut-off events. [2022-11-20 10:55:12,849 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-20 10:55:12,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1130 conditions, 992 events. 114/992 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4773 event pairs, 6 based on Foata normal form. 1/879 useless extension candidates. Maximal degree in co-relation 1127. Up to 52 conditions per place. [2022-11-20 10:55:12,866 INFO L137 encePairwiseOnDemand]: 344/352 looper letters, 59 selfloop transitions, 6 changer transitions 4/332 dead transitions. [2022-11-20 10:55:12,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 332 transitions, 817 flow [2022-11-20 10:55:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:55:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:55:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1726 transitions. [2022-11-20 10:55:12,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8172348484848485 [2022-11-20 10:55:12,872 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1726 transitions. [2022-11-20 10:55:12,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1726 transitions. [2022-11-20 10:55:12,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:12,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1726 transitions. [2022-11-20 10:55:12,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 287.6666666666667) internal successors, (1726), 6 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:12,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:12,884 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:12,884 INFO L175 Difference]: Start difference. First operand has 308 places, 310 transitions, 626 flow. Second operand 6 states and 1726 transitions. [2022-11-20 10:55:12,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 332 transitions, 817 flow [2022-11-20 10:55:12,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 332 transitions, 817 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:55:12,895 INFO L231 Difference]: Finished difference. Result has 307 places, 314 transitions, 662 flow [2022-11-20 10:55:12,895 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=662, PETRI_PLACES=307, PETRI_TRANSITIONS=314} [2022-11-20 10:55:12,896 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, -6 predicate places. [2022-11-20 10:55:12,896 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 314 transitions, 662 flow [2022-11-20 10:55:12,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:12,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:12,898 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:12,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:55:12,899 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)] === [2022-11-20 10:55:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash 497075190, now seen corresponding path program 1 times [2022-11-20 10:55:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:12,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331921494] [2022-11-20 10:55:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:12,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:13,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:13,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331921494] [2022-11-20 10:55:13,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331921494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:13,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:13,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:55:13,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628730609] [2022-11-20 10:55:13,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:13,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:55:13,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:13,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:55:13,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:55:13,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 352 [2022-11-20 10:55:13,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 314 transitions, 662 flow. Second operand has 7 states, 7 states have (on average 277.7142857142857) internal successors, (1944), 7 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:13,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:13,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 352 [2022-11-20 10:55:13,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:15,922 INFO L130 PetriNetUnfolder]: 1663/7948 cut-off events. [2022-11-20 10:55:15,923 INFO L131 PetriNetUnfolder]: For 804/844 co-relation queries the response was YES. [2022-11-20 10:55:15,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10928 conditions, 7948 events. 1663/7948 cut-off events. For 804/844 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 76255 event pairs, 523 based on Foata normal form. 0/6672 useless extension candidates. Maximal degree in co-relation 10921. Up to 716 conditions per place. [2022-11-20 10:55:16,057 INFO L137 encePairwiseOnDemand]: 336/352 looper letters, 177 selfloop transitions, 25 changer transitions 0/453 dead transitions. [2022-11-20 10:55:16,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 453 transitions, 1451 flow [2022-11-20 10:55:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:55:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-20 10:55:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4280 transitions. [2022-11-20 10:55:16,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8106060606060606 [2022-11-20 10:55:16,072 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4280 transitions. [2022-11-20 10:55:16,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4280 transitions. [2022-11-20 10:55:16,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:16,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4280 transitions. [2022-11-20 10:55:16,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 285.3333333333333) internal successors, (4280), 15 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:16,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 352.0) internal successors, (5632), 16 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:16,105 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 352.0) internal successors, (5632), 16 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:16,106 INFO L175 Difference]: Start difference. First operand has 307 places, 314 transitions, 662 flow. Second operand 15 states and 4280 transitions. [2022-11-20 10:55:16,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 453 transitions, 1451 flow [2022-11-20 10:55:16,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 453 transitions, 1447 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-20 10:55:16,118 INFO L231 Difference]: Finished difference. Result has 322 places, 334 transitions, 792 flow [2022-11-20 10:55:16,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=792, PETRI_PLACES=322, PETRI_TRANSITIONS=334} [2022-11-20 10:55:16,119 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 9 predicate places. [2022-11-20 10:55:16,120 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 334 transitions, 792 flow [2022-11-20 10:55:16,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 277.7142857142857) internal successors, (1944), 7 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:16,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:16,122 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:16,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:55:16,123 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)] === [2022-11-20 10:55:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash -861711133, now seen corresponding path program 1 times [2022-11-20 10:55:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:16,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198518534] [2022-11-20 10:55:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:16,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:16,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198518534] [2022-11-20 10:55:16,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198518534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:16,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:16,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:55:16,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913378594] [2022-11-20 10:55:16,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:16,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:55:16,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:55:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:55:16,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 352 [2022-11-20 10:55:16,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 334 transitions, 792 flow. Second operand has 5 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:16,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:16,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 352 [2022-11-20 10:55:16,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:18,368 INFO L130 PetriNetUnfolder]: 1607/6098 cut-off events. [2022-11-20 10:55:18,369 INFO L131 PetriNetUnfolder]: For 1293/1433 co-relation queries the response was YES. [2022-11-20 10:55:18,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9761 conditions, 6098 events. 1607/6098 cut-off events. For 1293/1433 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 53171 event pairs, 411 based on Foata normal form. 20/5274 useless extension candidates. Maximal degree in co-relation 9750. Up to 1355 conditions per place. [2022-11-20 10:55:18,479 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 51 selfloop transitions, 4 changer transitions 0/366 dead transitions. [2022-11-20 10:55:18,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 366 transitions, 1022 flow [2022-11-20 10:55:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:55:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:55:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1918 transitions. [2022-11-20 10:55:18,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9081439393939394 [2022-11-20 10:55:18,490 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1918 transitions. [2022-11-20 10:55:18,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1918 transitions. [2022-11-20 10:55:18,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:18,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1918 transitions. [2022-11-20 10:55:18,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 319.6666666666667) internal successors, (1918), 6 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:18,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:18,505 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:18,505 INFO L175 Difference]: Start difference. First operand has 322 places, 334 transitions, 792 flow. Second operand 6 states and 1918 transitions. [2022-11-20 10:55:18,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 366 transitions, 1022 flow [2022-11-20 10:55:18,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 366 transitions, 1022 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:55:18,517 INFO L231 Difference]: Finished difference. Result has 331 places, 337 transitions, 821 flow [2022-11-20 10:55:18,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=821, PETRI_PLACES=331, PETRI_TRANSITIONS=337} [2022-11-20 10:55:18,519 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 18 predicate places. [2022-11-20 10:55:18,519 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 337 transitions, 821 flow [2022-11-20 10:55:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:18,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:18,520 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:18,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:55:18,521 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)] === [2022-11-20 10:55:18,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:18,522 INFO L85 PathProgramCache]: Analyzing trace with hash -610252050, now seen corresponding path program 1 times [2022-11-20 10:55:18,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:18,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331897995] [2022-11-20 10:55:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:18,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:19,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331897995] [2022-11-20 10:55:19,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331897995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:19,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:19,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 10:55:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905105748] [2022-11-20 10:55:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:19,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:55:19,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:55:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:55:19,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 352 [2022-11-20 10:55:19,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 337 transitions, 821 flow. Second operand has 9 states, 9 states have (on average 237.55555555555554) internal successors, (2138), 9 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:19,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:19,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 352 [2022-11-20 10:55:19,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:21,729 INFO L130 PetriNetUnfolder]: 2519/8145 cut-off events. [2022-11-20 10:55:21,729 INFO L131 PetriNetUnfolder]: For 2394/2394 co-relation queries the response was YES. [2022-11-20 10:55:21,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13288 conditions, 8145 events. 2519/8145 cut-off events. For 2394/2394 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 74329 event pairs, 1390 based on Foata normal form. 3/6757 useless extension candidates. Maximal degree in co-relation 13273. Up to 1575 conditions per place. [2022-11-20 10:55:21,821 INFO L137 encePairwiseOnDemand]: 335/352 looper letters, 128 selfloop transitions, 12 changer transitions 50/412 dead transitions. [2022-11-20 10:55:21,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 412 transitions, 1378 flow [2022-11-20 10:55:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:55:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:55:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2257 transitions. [2022-11-20 10:55:21,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7124368686868687 [2022-11-20 10:55:21,828 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2257 transitions. [2022-11-20 10:55:21,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2257 transitions. [2022-11-20 10:55:21,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:21,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2257 transitions. [2022-11-20 10:55:21,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 250.77777777777777) internal successors, (2257), 9 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:21,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:21,844 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:21,845 INFO L175 Difference]: Start difference. First operand has 331 places, 337 transitions, 821 flow. Second operand 9 states and 2257 transitions. [2022-11-20 10:55:21,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 412 transitions, 1378 flow [2022-11-20 10:55:21,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 412 transitions, 1366 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-20 10:55:21,865 INFO L231 Difference]: Finished difference. Result has 336 places, 322 transitions, 775 flow [2022-11-20 10:55:21,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=775, PETRI_PLACES=336, PETRI_TRANSITIONS=322} [2022-11-20 10:55:21,868 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 23 predicate places. [2022-11-20 10:55:21,869 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 322 transitions, 775 flow [2022-11-20 10:55:21,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 237.55555555555554) internal successors, (2138), 9 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:21,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:21,870 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:21,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:55:21,871 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)] === [2022-11-20 10:55:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash -162167175, now seen corresponding path program 1 times [2022-11-20 10:55:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:21,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061921114] [2022-11-20 10:55:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:22,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:22,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061921114] [2022-11-20 10:55:22,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061921114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:22,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032939856] [2022-11-20 10:55:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:22,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:22,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:22,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:22,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:55:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:55:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:22,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:23,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032939856] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:23,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:23,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-11-20 10:55:23,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082257980] [2022-11-20 10:55:23,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:23,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:55:23,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:55:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:55:23,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 352 [2022-11-20 10:55:23,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 322 transitions, 775 flow. Second operand has 9 states, 9 states have (on average 266.6666666666667) internal successors, (2400), 9 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:23,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:23,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 352 [2022-11-20 10:55:23,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:28,707 INFO L130 PetriNetUnfolder]: 9276/26559 cut-off events. [2022-11-20 10:55:28,707 INFO L131 PetriNetUnfolder]: For 3143/3143 co-relation queries the response was YES. [2022-11-20 10:55:28,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42073 conditions, 26559 events. 9276/26559 cut-off events. For 3143/3143 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 293724 event pairs, 1582 based on Foata normal form. 0/22370 useless extension candidates. Maximal degree in co-relation 42057. Up to 3504 conditions per place. [2022-11-20 10:55:28,970 INFO L137 encePairwiseOnDemand]: 341/352 looper letters, 150 selfloop transitions, 17 changer transitions 0/411 dead transitions. [2022-11-20 10:55:28,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 411 transitions, 1352 flow [2022-11-20 10:55:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:55:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 10:55:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3029 transitions. [2022-11-20 10:55:28,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7822830578512396 [2022-11-20 10:55:28,977 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3029 transitions. [2022-11-20 10:55:28,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3029 transitions. [2022-11-20 10:55:28,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:28,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3029 transitions. [2022-11-20 10:55:28,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 275.3636363636364) internal successors, (3029), 11 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:29,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 352.0) internal successors, (4224), 12 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:29,011 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 352.0) internal successors, (4224), 12 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:29,011 INFO L175 Difference]: Start difference. First operand has 336 places, 322 transitions, 775 flow. Second operand 11 states and 3029 transitions. [2022-11-20 10:55:29,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 411 transitions, 1352 flow [2022-11-20 10:55:29,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 411 transitions, 1312 flow, removed 4 selfloop flow, removed 12 redundant places. [2022-11-20 10:55:29,031 INFO L231 Difference]: Finished difference. Result has 332 places, 334 transitions, 829 flow [2022-11-20 10:55:29,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=829, PETRI_PLACES=332, PETRI_TRANSITIONS=334} [2022-11-20 10:55:29,034 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 19 predicate places. [2022-11-20 10:55:29,034 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 334 transitions, 829 flow [2022-11-20 10:55:29,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 266.6666666666667) internal successors, (2400), 9 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:29,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:29,037 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:29,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:29,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:55:29,252 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)] === [2022-11-20 10:55:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash 159324595, now seen corresponding path program 2 times [2022-11-20 10:55:29,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:29,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608464498] [2022-11-20 10:55:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:29,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:29,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608464498] [2022-11-20 10:55:29,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608464498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529778792] [2022-11-20 10:55:29,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:55:29,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:29,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:29,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:29,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:55:29,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:55:29,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:29,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:55:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:55:30,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:55:30,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529778792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:30,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:55:30,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-20 10:55:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953181623] [2022-11-20 10:55:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:30,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:55:30,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:55:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:55:30,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 352 [2022-11-20 10:55:30,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 334 transitions, 829 flow. Second operand has 6 states, 6 states have (on average 266.6666666666667) internal successors, (1600), 6 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:30,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:30,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 352 [2022-11-20 10:55:30,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:33,288 INFO L130 PetriNetUnfolder]: 4032/14205 cut-off events. [2022-11-20 10:55:33,288 INFO L131 PetriNetUnfolder]: For 3780/3854 co-relation queries the response was YES. [2022-11-20 10:55:33,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23471 conditions, 14205 events. 4032/14205 cut-off events. For 3780/3854 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 148561 event pairs, 564 based on Foata normal form. 194/12570 useless extension candidates. Maximal degree in co-relation 23454. Up to 3788 conditions per place. [2022-11-20 10:55:33,419 INFO L137 encePairwiseOnDemand]: 343/352 looper letters, 78 selfloop transitions, 13 changer transitions 0/349 dead transitions. [2022-11-20 10:55:33,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 349 transitions, 1073 flow [2022-11-20 10:55:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:55:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 10:55:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2146 transitions. [2022-11-20 10:55:33,425 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7620738636363636 [2022-11-20 10:55:33,425 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2146 transitions. [2022-11-20 10:55:33,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2146 transitions. [2022-11-20 10:55:33,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:33,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2146 transitions. [2022-11-20 10:55:33,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 268.25) internal successors, (2146), 8 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:33,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:33,437 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:33,437 INFO L175 Difference]: Start difference. First operand has 332 places, 334 transitions, 829 flow. Second operand 8 states and 2146 transitions. [2022-11-20 10:55:33,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 349 transitions, 1073 flow [2022-11-20 10:55:33,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 349 transitions, 1066 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-20 10:55:33,460 INFO L231 Difference]: Finished difference. Result has 338 places, 337 transitions, 890 flow [2022-11-20 10:55:33,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=890, PETRI_PLACES=338, PETRI_TRANSITIONS=337} [2022-11-20 10:55:33,461 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 25 predicate places. [2022-11-20 10:55:33,461 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 337 transitions, 890 flow [2022-11-20 10:55:33,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 266.6666666666667) internal successors, (1600), 6 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:33,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:33,462 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:33,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:33,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:33,671 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)] === [2022-11-20 10:55:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:33,671 INFO L85 PathProgramCache]: Analyzing trace with hash -317413857, now seen corresponding path program 1 times [2022-11-20 10:55:33,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:33,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491053507] [2022-11-20 10:55:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:33,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:33,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:33,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491053507] [2022-11-20 10:55:33,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491053507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:33,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102389537] [2022-11-20 10:55:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:33,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:33,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:33,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:33,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:55:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:34,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:55:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:34,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:34,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102389537] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:34,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:34,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-11-20 10:55:34,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718346350] [2022-11-20 10:55:34,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:34,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:55:34,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:55:34,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:55:34,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 352 [2022-11-20 10:55:34,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 337 transitions, 890 flow. Second operand has 7 states, 7 states have (on average 278.42857142857144) internal successors, (1949), 7 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:34,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:34,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 352 [2022-11-20 10:55:34,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:36,843 INFO L130 PetriNetUnfolder]: 2116/9867 cut-off events. [2022-11-20 10:55:36,843 INFO L131 PetriNetUnfolder]: For 6162/7045 co-relation queries the response was YES. [2022-11-20 10:55:36,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17165 conditions, 9867 events. 2116/9867 cut-off events. For 6162/7045 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 103436 event pairs, 383 based on Foata normal form. 364/9288 useless extension candidates. Maximal degree in co-relation 17146. Up to 1814 conditions per place. [2022-11-20 10:55:36,958 INFO L137 encePairwiseOnDemand]: 344/352 looper letters, 82 selfloop transitions, 8 changer transitions 0/352 dead transitions. [2022-11-20 10:55:36,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 352 transitions, 1156 flow [2022-11-20 10:55:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:55:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:55:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1979 transitions. [2022-11-20 10:55:36,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8031655844155844 [2022-11-20 10:55:36,964 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1979 transitions. [2022-11-20 10:55:36,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1979 transitions. [2022-11-20 10:55:36,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:36,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1979 transitions. [2022-11-20 10:55:36,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 282.7142857142857) internal successors, (1979), 7 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:36,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:36,977 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:36,978 INFO L175 Difference]: Start difference. First operand has 338 places, 337 transitions, 890 flow. Second operand 7 states and 1979 transitions. [2022-11-20 10:55:36,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 352 transitions, 1156 flow [2022-11-20 10:55:37,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 352 transitions, 1134 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-20 10:55:37,011 INFO L231 Difference]: Finished difference. Result has 341 places, 338 transitions, 904 flow [2022-11-20 10:55:37,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=341, PETRI_TRANSITIONS=338} [2022-11-20 10:55:37,014 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 28 predicate places. [2022-11-20 10:55:37,014 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 338 transitions, 904 flow [2022-11-20 10:55:37,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 278.42857142857144) internal successors, (1949), 7 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:37,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:37,016 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:37,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 10:55:37,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb3e09a-3c3e-43a3-a040-171060fffe83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:37,222 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)] === [2022-11-20 10:55:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash 755052754, now seen corresponding path program 1 times [2022-11-20 10:55:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:37,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878110430] [2022-11-20 10:55:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:37,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:37,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:37,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878110430] [2022-11-20 10:55:37,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878110430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:37,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:37,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:55:37,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631798660] [2022-11-20 10:55:37,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:37,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:55:37,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:37,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:55:37,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:55:37,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 352 [2022-11-20 10:55:37,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 338 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 316.0) internal successors, (1580), 5 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:37,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:37,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 352 [2022-11-20 10:55:37,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:40,090 INFO L130 PetriNetUnfolder]: 2218/12015 cut-off events. [2022-11-20 10:55:40,090 INFO L131 PetriNetUnfolder]: For 2760/3178 co-relation queries the response was YES. [2022-11-20 10:55:40,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19065 conditions, 12015 events. 2218/12015 cut-off events. For 2760/3178 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 134400 event pairs, 572 based on Foata normal form. 84/10904 useless extension candidates. Maximal degree in co-relation 19044. Up to 1321 conditions per place. [2022-11-20 10:55:40,222 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 47 selfloop transitions, 4 changer transitions 0/366 dead transitions. [2022-11-20 10:55:40,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 366 transitions, 1110 flow [2022-11-20 10:55:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:55:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:55:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1918 transitions. [2022-11-20 10:55:40,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9081439393939394 [2022-11-20 10:55:40,227 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1918 transitions. [2022-11-20 10:55:40,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1918 transitions. [2022-11-20 10:55:40,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:40,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1918 transitions. [2022-11-20 10:55:40,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 319.6666666666667) internal successors, (1918), 6 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:40,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:40,237 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:40,237 INFO L175 Difference]: Start difference. First operand has 341 places, 338 transitions, 904 flow. Second operand 6 states and 1918 transitions. [2022-11-20 10:55:40,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 366 transitions, 1110 flow [2022-11-20 10:55:40,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 366 transitions, 1094 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 10:55:40,269 INFO L231 Difference]: Finished difference. Result has 344 places, 341 transitions, 917 flow [2022-11-20 10:55:40,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=917, PETRI_PLACES=344, PETRI_TRANSITIONS=341} [2022-11-20 10:55:40,271 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 31 predicate places. [2022-11-20 10:55:40,271 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 341 transitions, 917 flow [2022-11-20 10:55:40,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.0) internal successors, (1580), 5 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:40,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:40,272 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:40,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:55:40,272 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)] === [2022-11-20 10:55:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:40,273 INFO L85 PathProgramCache]: Analyzing trace with hash 775088213, now seen corresponding path program 1 times [2022-11-20 10:55:40,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:40,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912846283] [2022-11-20 10:55:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:40,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:55:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912846283] [2022-11-20 10:55:40,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912846283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:40,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:40,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:40,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738605293] [2022-11-20 10:55:40,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:40,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:40,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:40,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 352 [2022-11-20 10:55:40,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 341 transitions, 917 flow. Second operand has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:40,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:40,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 352 [2022-11-20 10:55:40,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:43,647 INFO L130 PetriNetUnfolder]: 2508/14663 cut-off events. [2022-11-20 10:55:43,647 INFO L131 PetriNetUnfolder]: For 3804/4222 co-relation queries the response was YES. [2022-11-20 10:55:43,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23726 conditions, 14663 events. 2508/14663 cut-off events. For 3804/4222 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 172118 event pairs, 638 based on Foata normal form. 146/13488 useless extension candidates. Maximal degree in co-relation 23703. Up to 1457 conditions per place. [2022-11-20 10:55:43,802 INFO L137 encePairwiseOnDemand]: 348/352 looper letters, 43 selfloop transitions, 3 changer transitions 0/362 dead transitions. [2022-11-20 10:55:43,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 362 transitions, 1095 flow [2022-11-20 10:55:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:55:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1597 transitions. [2022-11-20 10:55:43,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9073863636363636 [2022-11-20 10:55:43,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1597 transitions. [2022-11-20 10:55:43,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1597 transitions. [2022-11-20 10:55:43,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:43,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1597 transitions. [2022-11-20 10:55:43,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 319.4) internal successors, (1597), 5 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,815 INFO L175 Difference]: Start difference. First operand has 344 places, 341 transitions, 917 flow. Second operand 5 states and 1597 transitions. [2022-11-20 10:55:43,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 362 transitions, 1095 flow [2022-11-20 10:55:43,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 362 transitions, 1095 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:55:43,864 INFO L231 Difference]: Finished difference. Result has 351 places, 343 transitions, 942 flow [2022-11-20 10:55:43,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=942, PETRI_PLACES=351, PETRI_TRANSITIONS=343} [2022-11-20 10:55:43,865 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 38 predicate places. [2022-11-20 10:55:43,865 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 343 transitions, 942 flow [2022-11-20 10:55:43,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:43,866 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:43,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:55:43,867 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)] === [2022-11-20 10:55:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash -360617222, now seen corresponding path program 1 times [2022-11-20 10:55:43,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:43,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838768999] [2022-11-20 10:55:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:43,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:44,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:44,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838768999] [2022-11-20 10:55:44,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838768999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:44,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:44,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:44,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992992761] [2022-11-20 10:55:44,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:44,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:44,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 352 [2022-11-20 10:55:44,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 343 transitions, 942 flow. Second operand has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:44,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:44,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 352 [2022-11-20 10:55:44,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:47,494 INFO L130 PetriNetUnfolder]: 2590/15767 cut-off events. [2022-11-20 10:55:47,495 INFO L131 PetriNetUnfolder]: For 4276/4546 co-relation queries the response was YES. [2022-11-20 10:55:47,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25945 conditions, 15767 events. 2590/15767 cut-off events. For 4276/4546 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 189331 event pairs, 714 based on Foata normal form. 128/14547 useless extension candidates. Maximal degree in co-relation 25919. Up to 1457 conditions per place. [2022-11-20 10:55:47,693 INFO L137 encePairwiseOnDemand]: 348/352 looper letters, 43 selfloop transitions, 3 changer transitions 0/364 dead transitions. [2022-11-20 10:55:47,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 364 transitions, 1120 flow [2022-11-20 10:55:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:55:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1597 transitions. [2022-11-20 10:55:47,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9073863636363636 [2022-11-20 10:55:47,711 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1597 transitions. [2022-11-20 10:55:47,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1597 transitions. [2022-11-20 10:55:47,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:47,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1597 transitions. [2022-11-20 10:55:47,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 319.4) internal successors, (1597), 5 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,721 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,722 INFO L175 Difference]: Start difference. First operand has 351 places, 343 transitions, 942 flow. Second operand 5 states and 1597 transitions. [2022-11-20 10:55:47,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 364 transitions, 1120 flow [2022-11-20 10:55:47,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 364 transitions, 1120 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:55:47,798 INFO L231 Difference]: Finished difference. Result has 358 places, 345 transitions, 967 flow [2022-11-20 10:55:47,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=967, PETRI_PLACES=358, PETRI_TRANSITIONS=345} [2022-11-20 10:55:47,800 INFO L288 CegarLoopForPetriNet]: 313 programPoint places, 45 predicate places. [2022-11-20 10:55:47,800 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 345 transitions, 967 flow [2022-11-20 10:55:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:47,801 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:47,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:55:47,802 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)] === [2022-11-20 10:55:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1147359979, now seen corresponding path program 1 times [2022-11-20 10:55:47,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:47,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28705488] [2022-11-20 10:55:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:55:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28705488] [2022-11-20 10:55:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28705488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:49,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:49,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 10:55:49,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805185029] [2022-11-20 10:55:49,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:49,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:55:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:55:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:55:49,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 352 [2022-11-20 10:55:49,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 345 transitions, 967 flow. Second operand has 18 states, 18 states have (on average 240.72222222222223) internal successors, (4333), 18 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:49,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:49,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 352 [2022-11-20 10:55:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand