./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.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_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/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_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/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_1ec8a963-c43a-4472-90fc-ab79830db106/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 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --- 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 10:35:34,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:35:34,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:35:34,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:35:34,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:35:34,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:35:34,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:35:34,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:35:34,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:35:34,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:35:34,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:35:34,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:35:34,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:35:34,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:35:34,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:35:34,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:35:34,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:35:34,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:35:34,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:35:34,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:35:34,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:35:34,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:35:34,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:35:34,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:35:34,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:35:34,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:35:34,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:35:34,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:35:34,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:35:34,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:35:34,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:35:34,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:35:34,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:35:34,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:35:34,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:35:34,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:35:34,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:35:34,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:35:34,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:35:34,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:35:34,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:35:34,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:35:34,724 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:35:34,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:35:34,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:35:34,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:35:34,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:35:34,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:35:34,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:35:34,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:35:34,727 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:35:34,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:35:34,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:35:34,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:35:34,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:35:34,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:35:34,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:35:34,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:35:34,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:35:34,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:35:34,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:35:34,731 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:35:34,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:35:34,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:35:34,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:35:34,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:35:34,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:35:34,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:35:34,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:35:34,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:35:34,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:35:34,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:35:34,735 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:35:34,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:35:34,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:35:34,735 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_1ec8a963-c43a-4472-90fc-ab79830db106/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2022-11-20 10:35:35,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:35:35,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:35:35,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:35:35,103 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:35:35,104 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:35:35,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-11-20 10:35:38,009 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:35:38,229 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:35:38,229 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-11-20 10:35:38,237 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/data/03bd68d23/a8e6829c94814e3f821c024576613917/FLAG78fe2af68 [2022-11-20 10:35:38,254 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/data/03bd68d23/a8e6829c94814e3f821c024576613917 [2022-11-20 10:35:38,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:35:38,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:35:38,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:35:38,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:35:38,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:35:38,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6f86df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38, skipping insertion in model container [2022-11-20 10:35:38,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:35:38,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:35:38,480 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_1ec8a963-c43a-4472-90fc-ab79830db106/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-11-20 10:35:38,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:35:38,498 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:35:38,524 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_1ec8a963-c43a-4472-90fc-ab79830db106/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-11-20 10:35:38,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:35:38,541 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:35:38,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38 WrapperNode [2022-11-20 10:35:38,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:35:38,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:35:38,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:35:38,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:35:38,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,585 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2022-11-20 10:35:38,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:35:38,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:35:38,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:35:38,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:35:38,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:35:38,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:35:38,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:35:38,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:35:38,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (1/1) ... [2022-11-20 10:35:38,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:35:38,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:38,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:35:38,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:35:38,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:35:38,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:35:38,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:35:38,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:35:38,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:35:38,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:35:38,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:35:38,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:35:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:35:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:35:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:35:38,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:35:38,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:35:38,713 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 10:35:38,850 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:35:38,852 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:35:39,359 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:35:39,369 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:35:39,370 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:35:39,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:35:39 BoogieIcfgContainer [2022-11-20 10:35:39,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:35:39,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:35:39,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:35:39,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:35:39,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:35:38" (1/3) ... [2022-11-20 10:35:39,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6432820b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:35:39, skipping insertion in model container [2022-11-20 10:35:39,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:38" (2/3) ... [2022-11-20 10:35:39,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6432820b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:35:39, skipping insertion in model container [2022-11-20 10:35:39,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:35:39" (3/3) ... [2022-11-20 10:35:39,381 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-11-20 10:35:39,393 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:35:39,403 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:35:39,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:35:39,403 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:35:39,493 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:35:39,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 273 transitions, 562 flow [2022-11-20 10:35:39,757 INFO L130 PetriNetUnfolder]: 19/271 cut-off events. [2022-11-20 10:35:39,757 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:35:39,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 271 events. 19/271 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 489 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 176. Up to 2 conditions per place. [2022-11-20 10:35:39,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 273 transitions, 562 flow [2022-11-20 10:35:39,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 262 transitions, 536 flow [2022-11-20 10:35:39,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:35:39,798 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;@4b87794, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:35:39,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 10:35:39,877 INFO L130 PetriNetUnfolder]: 19/261 cut-off events. [2022-11-20 10:35:39,878 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:35:39,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:39,879 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] [2022-11-20 10:35:39,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:39,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1330372674, now seen corresponding path program 1 times [2022-11-20 10:35:39,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:39,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922352970] [2022-11-20 10:35:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:39,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,236 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 10:35:40,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:40,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922352970] [2022-11-20 10:35:40,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922352970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:40,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:40,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:40,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647101451] [2022-11-20 10:35:40,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:40,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:35:40,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:35:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:35:40,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 273 [2022-11-20 10:35:40,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 262 transitions, 536 flow. Second operand has 2 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 10:35:40,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:40,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 273 [2022-11-20 10:35:40,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:40,367 INFO L130 PetriNetUnfolder]: 5/248 cut-off events. [2022-11-20 10:35:40,368 INFO L131 PetriNetUnfolder]: For 8/9 co-relation queries the response was YES. [2022-11-20 10:35:40,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 248 events. 5/248 cut-off events. For 8/9 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 447 event pairs, 0 based on Foata normal form. 18/250 useless extension candidates. Maximal degree in co-relation 169. Up to 5 conditions per place. [2022-11-20 10:35:40,372 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 4 selfloop transitions, 0 changer transitions 3/248 dead transitions. [2022-11-20 10:35:40,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 248 transitions, 516 flow [2022-11-20 10:35:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:35:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:35:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 526 transitions. [2022-11-20 10:35:40,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9633699633699634 [2022-11-20 10:35:40,388 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 526 transitions. [2022-11-20 10:35:40,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 526 transitions. [2022-11-20 10:35:40,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:40,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 526 transitions. [2022-11-20 10:35:40,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 263.0) internal successors, (526), 2 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 10:35:40,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 10:35:40,405 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 10:35:40,407 INFO L175 Difference]: Start difference. First operand has 250 places, 262 transitions, 536 flow. Second operand 2 states and 526 transitions. [2022-11-20 10:35:40,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 248 transitions, 516 flow [2022-11-20 10:35:40,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 248 transitions, 508 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:35:40,417 INFO L231 Difference]: Finished difference. Result has 247 places, 245 transitions, 494 flow [2022-11-20 10:35:40,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=494, PETRI_PLACES=247, PETRI_TRANSITIONS=245} [2022-11-20 10:35:40,423 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, -3 predicate places. [2022-11-20 10:35:40,423 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 245 transitions, 494 flow [2022-11-20 10:35:40,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 10:35:40,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:40,424 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] [2022-11-20 10:35:40,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:35:40,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1248035611, now seen corresponding path program 1 times [2022-11-20 10:35:40,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:40,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558073441] [2022-11-20 10:35:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:40,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:40,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:40,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558073441] [2022-11-20 10:35:40,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558073441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:40,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:40,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:35:40,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419851073] [2022-11-20 10:35:40,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:40,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:35:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:35:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:40,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 273 [2022-11-20 10:35:40,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 245 transitions, 494 flow. Second operand has 5 states, 5 states have (on average 244.4) internal successors, (1222), 5 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states 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 10:35:40,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:40,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 273 [2022-11-20 10:35:40,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:40,987 INFO L130 PetriNetUnfolder]: 5/251 cut-off events. [2022-11-20 10:35:40,987 INFO L131 PetriNetUnfolder]: For 2/3 co-relation queries the response was YES. [2022-11-20 10:35:40,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 251 events. 5/251 cut-off events. For 2/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 440 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 273. Up to 14 conditions per place. [2022-11-20 10:35:40,992 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 16 selfloop transitions, 4 changer transitions 0/249 dead transitions. [2022-11-20 10:35:40,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 249 transitions, 542 flow [2022-11-20 10:35:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:35:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1231 transitions. [2022-11-20 10:35:40,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9018315018315018 [2022-11-20 10:35:40,997 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1231 transitions. [2022-11-20 10:35:40,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1231 transitions. [2022-11-20 10:35:40,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:40,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1231 transitions. [2022-11-20 10:35:41,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states 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 10:35:41,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states 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 10:35:41,009 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states 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 10:35:41,009 INFO L175 Difference]: Start difference. First operand has 247 places, 245 transitions, 494 flow. Second operand 5 states and 1231 transitions. [2022-11-20 10:35:41,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 249 transitions, 542 flow [2022-11-20 10:35:41,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 249 transitions, 542 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:35:41,025 INFO L231 Difference]: Finished difference. Result has 249 places, 246 transitions, 510 flow [2022-11-20 10:35:41,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=249, PETRI_TRANSITIONS=246} [2022-11-20 10:35:41,027 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, -1 predicate places. [2022-11-20 10:35:41,027 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 246 transitions, 510 flow [2022-11-20 10:35:41,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 244.4) internal successors, (1222), 5 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states 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 10:35:41,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:41,028 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 10:35:41,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:35:41,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1905021540, now seen corresponding path program 1 times [2022-11-20 10:35:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:41,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380850047] [2022-11-20 10:35:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:41,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380850047] [2022-11-20 10:35:41,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380850047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941134781] [2022-11-20 10:35:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:41,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:41,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:41,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:35:41,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:35:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:35:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:41,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:41,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941134781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:41,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:35:41,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-20 10:35:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897941658] [2022-11-20 10:35:41,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:41,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:35:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:35:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:35:41,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 273 [2022-11-20 10:35:41,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 246 transitions, 510 flow. Second operand has 14 states, 14 states have (on average 243.64285714285714) internal successors, (3411), 14 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states 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 10:35:41,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:41,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 273 [2022-11-20 10:35:41,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:42,161 INFO L130 PetriNetUnfolder]: 5/260 cut-off events. [2022-11-20 10:35:42,161 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-20 10:35:42,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 260 events. 5/260 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 431 event pairs, 0 based on Foata normal form. 2/250 useless extension candidates. Maximal degree in co-relation 298. Up to 11 conditions per place. [2022-11-20 10:35:42,163 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 17 selfloop transitions, 11 changer transitions 0/256 dead transitions. [2022-11-20 10:35:42,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 256 transitions, 588 flow [2022-11-20 10:35:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:35:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 10:35:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2681 transitions. [2022-11-20 10:35:42,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8927738927738927 [2022-11-20 10:35:42,170 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2681 transitions. [2022-11-20 10:35:42,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2681 transitions. [2022-11-20 10:35:42,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:42,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2681 transitions. [2022-11-20 10:35:42,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 243.72727272727272) internal successors, (2681), 11 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states 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 10:35:42,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states 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 10:35:42,186 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states 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 10:35:42,187 INFO L175 Difference]: Start difference. First operand has 249 places, 246 transitions, 510 flow. Second operand 11 states and 2681 transitions. [2022-11-20 10:35:42,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 256 transitions, 588 flow [2022-11-20 10:35:42,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 256 transitions, 582 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:35:42,192 INFO L231 Difference]: Finished difference. Result has 259 places, 252 transitions, 559 flow [2022-11-20 10:35:42,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=559, PETRI_PLACES=259, PETRI_TRANSITIONS=252} [2022-11-20 10:35:42,194 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 9 predicate places. [2022-11-20 10:35:42,194 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 252 transitions, 559 flow [2022-11-20 10:35:42,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 243.64285714285714) internal successors, (3411), 14 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states 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 10:35:42,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:42,197 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:35:42,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:42,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ec8a963-c43a-4472-90fc-ab79830db106/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 10:35:42,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:42,404 INFO L85 PathProgramCache]: Analyzing trace with hash -289871036, now seen corresponding path program 2 times [2022-11-20 10:35:42,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:42,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822953195] [2022-11-20 10:35:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:42,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:35:43,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:43,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822953195] [2022-11-20 10:35:43,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822953195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:43,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:43,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 10:35:43,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227597523] [2022-11-20 10:35:43,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:43,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:43,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:43,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:35:43,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 252 transitions, 559 flow. Second operand has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states 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 10:35:43,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:43,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:35:43,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:44,127 INFO L130 PetriNetUnfolder]: 392/2360 cut-off events. [2022-11-20 10:35:44,127 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-20 10:35:44,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3211 conditions, 2360 events. 392/2360 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 19316 event pairs, 124 based on Foata normal form. 1/2143 useless extension candidates. Maximal degree in co-relation 3203. Up to 306 conditions per place. [2022-11-20 10:35:44,141 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 129 selfloop transitions, 20 changer transitions 15/363 dead transitions. [2022-11-20 10:35:44,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 363 transitions, 1119 flow [2022-11-20 10:35:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:35:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:35:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2791 transitions. [2022-11-20 10:35:44,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7864187094956325 [2022-11-20 10:35:44,149 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2791 transitions. [2022-11-20 10:35:44,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2791 transitions. [2022-11-20 10:35:44,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:44,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2791 transitions. [2022-11-20 10:35:44,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.69230769230768) internal successors, (2791), 13 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states 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 10:35:44,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:35:44,164 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:35:44,164 INFO L175 Difference]: Start difference. First operand has 259 places, 252 transitions, 559 flow. Second operand 13 states and 2791 transitions. [2022-11-20 10:35:44,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 363 transitions, 1119 flow [2022-11-20 10:35:44,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 363 transitions, 1110 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 10:35:44,173 INFO L231 Difference]: Finished difference. Result has 278 places, 266 transitions, 687 flow [2022-11-20 10:35:44,173 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=687, PETRI_PLACES=278, PETRI_TRANSITIONS=266} [2022-11-20 10:35:44,174 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 28 predicate places. [2022-11-20 10:35:44,174 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 266 transitions, 687 flow [2022-11-20 10:35:44,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states 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 10:35:44,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:44,176 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:35:44,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:35:44,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash -399820642, now seen corresponding path program 3 times [2022-11-20 10:35:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:44,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119555979] [2022-11-20 10:35:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:44,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:35:44,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:44,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119555979] [2022-11-20 10:35:44,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119555979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:44,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:44,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 10:35:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957446644] [2022-11-20 10:35:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:44,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:44,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:35:44,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 266 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states 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 10:35:44,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:44,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:35:44,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:46,239 INFO L130 PetriNetUnfolder]: 732/4397 cut-off events. [2022-11-20 10:35:46,239 INFO L131 PetriNetUnfolder]: For 1275/1299 co-relation queries the response was YES. [2022-11-20 10:35:46,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7394 conditions, 4397 events. 732/4397 cut-off events. For 1275/1299 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 42028 event pairs, 296 based on Foata normal form. 11/3998 useless extension candidates. Maximal degree in co-relation 7376. Up to 524 conditions per place. [2022-11-20 10:35:46,271 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 160 selfloop transitions, 26 changer transitions 16/403 dead transitions. [2022-11-20 10:35:46,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 403 transitions, 1666 flow [2022-11-20 10:35:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:35:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:35:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2793 transitions. [2022-11-20 10:35:46,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7869822485207101 [2022-11-20 10:35:46,282 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2793 transitions. [2022-11-20 10:35:46,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2793 transitions. [2022-11-20 10:35:46,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:46,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2793 transitions. [2022-11-20 10:35:46,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.84615384615384) internal successors, (2793), 13 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states 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 10:35:46,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:35:46,298 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:35:46,299 INFO L175 Difference]: Start difference. First operand has 278 places, 266 transitions, 687 flow. Second operand 13 states and 2793 transitions. [2022-11-20 10:35:46,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 403 transitions, 1666 flow [2022-11-20 10:35:46,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 403 transitions, 1616 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-11-20 10:35:46,319 INFO L231 Difference]: Finished difference. Result has 292 places, 280 transitions, 862 flow [2022-11-20 10:35:46,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=862, PETRI_PLACES=292, PETRI_TRANSITIONS=280} [2022-11-20 10:35:46,322 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 42 predicate places. [2022-11-20 10:35:46,322 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 280 transitions, 862 flow [2022-11-20 10:35:46,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states 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 10:35:46,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:46,324 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:35:46,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:35:46,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:46,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1393851772, now seen corresponding path program 4 times [2022-11-20 10:35:46,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:46,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978240872] [2022-11-20 10:35:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:46,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:35:47,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:47,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978240872] [2022-11-20 10:35:47,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978240872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:47,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:47,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 10:35:47,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190639290] [2022-11-20 10:35:47,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:47,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:35:47,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:35:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:35:47,149 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:35:47,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 280 transitions, 862 flow. Second operand has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:35:47,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:47,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:35:47,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:48,994 INFO L130 PetriNetUnfolder]: 1043/6502 cut-off events. [2022-11-20 10:35:48,995 INFO L131 PetriNetUnfolder]: For 5238/5289 co-relation queries the response was YES. [2022-11-20 10:35:49,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12083 conditions, 6502 events. 1043/6502 cut-off events. For 5238/5289 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 68406 event pairs, 301 based on Foata normal form. 20/5925 useless extension candidates. Maximal degree in co-relation 12057. Up to 1240 conditions per place. [2022-11-20 10:35:49,060 INFO L137 encePairwiseOnDemand]: 250/273 looper letters, 136 selfloop transitions, 67 changer transitions 17/421 dead transitions. [2022-11-20 10:35:49,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 421 transitions, 2162 flow [2022-11-20 10:35:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:35:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 10:35:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2988 transitions. [2022-11-20 10:35:49,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7817896389324961 [2022-11-20 10:35:49,067 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2988 transitions. [2022-11-20 10:35:49,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2988 transitions. [2022-11-20 10:35:49,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:49,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2988 transitions. [2022-11-20 10:35:49,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 213.42857142857142) internal successors, (2988), 14 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states 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 10:35:49,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 273.0) internal successors, (4095), 15 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states 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 10:35:49,099 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 273.0) internal successors, (4095), 15 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states 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 10:35:49,099 INFO L175 Difference]: Start difference. First operand has 292 places, 280 transitions, 862 flow. Second operand 14 states and 2988 transitions. [2022-11-20 10:35:49,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 421 transitions, 2162 flow [2022-11-20 10:35:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 421 transitions, 2101 flow, removed 22 selfloop flow, removed 4 redundant places. [2022-11-20 10:35:49,131 INFO L231 Difference]: Finished difference. Result has 308 places, 332 transitions, 1495 flow [2022-11-20 10:35:49,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1495, PETRI_PLACES=308, PETRI_TRANSITIONS=332} [2022-11-20 10:35:49,134 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 58 predicate places. [2022-11-20 10:35:49,135 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 332 transitions, 1495 flow [2022-11-20 10:35:49,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:35:49,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:49,153 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:35:49,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:35:49,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1565977938, now seen corresponding path program 5 times [2022-11-20 10:35:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:49,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893369847] [2022-11-20 10:35:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:49,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:35:49,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893369847] [2022-11-20 10:35:49,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893369847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:49,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:49,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 10:35:49,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067708438] [2022-11-20 10:35:49,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:49,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:49,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:49,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:35:49,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 332 transitions, 1495 flow. Second operand has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states 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 10:35:49,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:49,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:35:49,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:52,357 INFO L130 PetriNetUnfolder]: 1254/7713 cut-off events. [2022-11-20 10:35:52,357 INFO L131 PetriNetUnfolder]: For 10424/10538 co-relation queries the response was YES. [2022-11-20 10:35:52,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16072 conditions, 7713 events. 1254/7713 cut-off events. For 10424/10538 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 84571 event pairs, 447 based on Foata normal form. 33/7067 useless extension candidates. Maximal degree in co-relation 16037. Up to 996 conditions per place. [2022-11-20 10:35:52,429 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 185 selfloop transitions, 83 changer transitions 20/494 dead transitions. [2022-11-20 10:35:52,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 494 transitions, 3393 flow [2022-11-20 10:35:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:35:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 10:35:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2580 transitions. [2022-11-20 10:35:52,439 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7875457875457875 [2022-11-20 10:35:52,439 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2580 transitions. [2022-11-20 10:35:52,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2580 transitions. [2022-11-20 10:35:52,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:52,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2580 transitions. [2022-11-20 10:35:52,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states 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 10:35:52,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 273.0) internal successors, (3549), 13 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states 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 10:35:52,453 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 273.0) internal successors, (3549), 13 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states 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 10:35:52,453 INFO L175 Difference]: Start difference. First operand has 308 places, 332 transitions, 1495 flow. Second operand 12 states and 2580 transitions. [2022-11-20 10:35:52,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 494 transitions, 3393 flow [2022-11-20 10:35:52,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 494 transitions, 3305 flow, removed 44 selfloop flow, removed 2 redundant places. [2022-11-20 10:35:52,545 INFO L231 Difference]: Finished difference. Result has 321 places, 379 transitions, 2316 flow [2022-11-20 10:35:52,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2316, PETRI_PLACES=321, PETRI_TRANSITIONS=379} [2022-11-20 10:35:52,547 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 71 predicate places. [2022-11-20 10:35:52,548 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 379 transitions, 2316 flow [2022-11-20 10:35:52,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states 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 10:35:52,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:52,549 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:35:52,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:35:52,549 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:52,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1532592448, now seen corresponding path program 6 times [2022-11-20 10:35:52,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:52,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183289402] [2022-11-20 10:35:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:35:53,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:53,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183289402] [2022-11-20 10:35:53,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183289402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:53,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:53,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 10:35:53,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81410435] [2022-11-20 10:35:53,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:53,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:35:53,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:35:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:35:53,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:35:53,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 379 transitions, 2316 flow. Second operand has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:35:53,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:53,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:35:53,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:35:56,125 INFO L130 PetriNetUnfolder]: 1617/10538 cut-off events. [2022-11-20 10:35:56,125 INFO L131 PetriNetUnfolder]: For 22311/22526 co-relation queries the response was YES. [2022-11-20 10:35:56,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23305 conditions, 10538 events. 1617/10538 cut-off events. For 22311/22526 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 124661 event pairs, 515 based on Foata normal form. 63/9641 useless extension candidates. Maximal degree in co-relation 23263. Up to 1638 conditions per place. [2022-11-20 10:35:56,217 INFO L137 encePairwiseOnDemand]: 250/273 looper letters, 211 selfloop transitions, 153 changer transitions 16/586 dead transitions. [2022-11-20 10:35:56,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 586 transitions, 5144 flow [2022-11-20 10:35:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:35:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 10:35:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2989 transitions. [2022-11-20 10:35:56,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.782051282051282 [2022-11-20 10:35:56,224 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2989 transitions. [2022-11-20 10:35:56,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2989 transitions. [2022-11-20 10:35:56,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:35:56,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2989 transitions. [2022-11-20 10:35:56,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 213.5) internal successors, (2989), 14 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states 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 10:35:56,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 273.0) internal successors, (4095), 15 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states 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 10:35:56,240 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 273.0) internal successors, (4095), 15 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states 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 10:35:56,240 INFO L175 Difference]: Start difference. First operand has 321 places, 379 transitions, 2316 flow. Second operand 14 states and 2989 transitions. [2022-11-20 10:35:56,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 586 transitions, 5144 flow [2022-11-20 10:35:56,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 586 transitions, 4706 flow, removed 106 selfloop flow, removed 8 redundant places. [2022-11-20 10:35:56,342 INFO L231 Difference]: Finished difference. Result has 333 places, 472 transitions, 3622 flow [2022-11-20 10:35:56,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3622, PETRI_PLACES=333, PETRI_TRANSITIONS=472} [2022-11-20 10:35:56,343 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 83 predicate places. [2022-11-20 10:35:56,344 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 472 transitions, 3622 flow [2022-11-20 10:35:56,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:35:56,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:35:56,345 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:35:56,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:35:56,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:35:56,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:56,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1466386516, now seen corresponding path program 7 times [2022-11-20 10:35:56,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:56,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976110174] [2022-11-20 10:35:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:56,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:35:57,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:57,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976110174] [2022-11-20 10:35:57,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976110174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:57,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:57,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 10:35:57,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597348680] [2022-11-20 10:35:57,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:57,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:35:57,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:35:57,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:35:57,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:35:57,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 472 transitions, 3622 flow. Second operand has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:35:57,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:35:57,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:35:57,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:36:00,124 INFO L130 PetriNetUnfolder]: 1744/10999 cut-off events. [2022-11-20 10:36:00,124 INFO L131 PetriNetUnfolder]: For 30885/31345 co-relation queries the response was YES. [2022-11-20 10:36:00,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 10999 events. 1744/10999 cut-off events. For 30885/31345 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 131027 event pairs, 497 based on Foata normal form. 145/10120 useless extension candidates. Maximal degree in co-relation 25955. Up to 1086 conditions per place. [2022-11-20 10:36:00,217 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 256 selfloop transitions, 164 changer transitions 20/646 dead transitions. [2022-11-20 10:36:00,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 646 transitions, 6423 flow [2022-11-20 10:36:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:36:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:36:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2792 transitions. [2022-11-20 10:36:00,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7867004790081713 [2022-11-20 10:36:00,230 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2792 transitions. [2022-11-20 10:36:00,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2792 transitions. [2022-11-20 10:36:00,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:36:00,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2792 transitions. [2022-11-20 10:36:00,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.76923076923077) internal successors, (2792), 13 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states 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 10:36:00,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:00,247 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:00,247 INFO L175 Difference]: Start difference. First operand has 333 places, 472 transitions, 3622 flow. Second operand 13 states and 2792 transitions. [2022-11-20 10:36:00,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 646 transitions, 6423 flow [2022-11-20 10:36:00,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 646 transitions, 6141 flow, removed 141 selfloop flow, removed 4 redundant places. [2022-11-20 10:36:00,418 INFO L231 Difference]: Finished difference. Result has 347 places, 510 transitions, 4698 flow [2022-11-20 10:36:00,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4698, PETRI_PLACES=347, PETRI_TRANSITIONS=510} [2022-11-20 10:36:00,420 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 97 predicate places. [2022-11-20 10:36:00,421 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 510 transitions, 4698 flow [2022-11-20 10:36:00,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:36:00,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:36:00,422 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:00,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:36:00,423 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:36:00,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:00,423 INFO L85 PathProgramCache]: Analyzing trace with hash 31191990, now seen corresponding path program 8 times [2022-11-20 10:36:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:00,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63924926] [2022-11-20 10:36:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:00,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:36:01,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:01,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63924926] [2022-11-20 10:36:01,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63924926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:01,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:01,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 10:36:01,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666174776] [2022-11-20 10:36:01,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:01,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:36:01,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:36:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:36:01,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:36:01,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 510 transitions, 4698 flow. Second operand has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:36:01,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:36:01,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:36:01,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:36:04,328 INFO L130 PetriNetUnfolder]: 1811/11610 cut-off events. [2022-11-20 10:36:04,329 INFO L131 PetriNetUnfolder]: For 41869/42331 co-relation queries the response was YES. [2022-11-20 10:36:04,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28788 conditions, 11610 events. 1811/11610 cut-off events. For 41869/42331 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 140832 event pairs, 642 based on Foata normal form. 98/10633 useless extension candidates. Maximal degree in co-relation 28733. Up to 1789 conditions per place. [2022-11-20 10:36:04,457 INFO L137 encePairwiseOnDemand]: 251/273 looper letters, 337 selfloop transitions, 107 changer transitions 16/666 dead transitions. [2022-11-20 10:36:04,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 666 transitions, 7601 flow [2022-11-20 10:36:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:36:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:36:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2778 transitions. [2022-11-20 10:36:04,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7827557058326289 [2022-11-20 10:36:04,465 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2778 transitions. [2022-11-20 10:36:04,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2778 transitions. [2022-11-20 10:36:04,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:36:04,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2778 transitions. [2022-11-20 10:36:04,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 213.69230769230768) internal successors, (2778), 13 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states 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 10:36:04,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:04,483 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:04,483 INFO L175 Difference]: Start difference. First operand has 347 places, 510 transitions, 4698 flow. Second operand 13 states and 2778 transitions. [2022-11-20 10:36:04,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 666 transitions, 7601 flow [2022-11-20 10:36:04,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 666 transitions, 7263 flow, removed 114 selfloop flow, removed 6 redundant places. [2022-11-20 10:36:04,718 INFO L231 Difference]: Finished difference. Result has 360 places, 559 transitions, 5815 flow [2022-11-20 10:36:04,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5815, PETRI_PLACES=360, PETRI_TRANSITIONS=559} [2022-11-20 10:36:04,719 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 110 predicate places. [2022-11-20 10:36:04,719 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 559 transitions, 5815 flow [2022-11-20 10:36:04,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:36:04,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:36:04,721 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:04,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:36:04,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:36:04,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:04,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1744548376, now seen corresponding path program 9 times [2022-11-20 10:36:04,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:04,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043043000] [2022-11-20 10:36:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:04,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:36:05,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:05,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043043000] [2022-11-20 10:36:05,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043043000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:05,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:05,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 10:36:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401234860] [2022-11-20 10:36:05,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:05,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:36:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:05,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:36:05,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:36:05,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:36:05,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 559 transitions, 5815 flow. Second operand has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:36:05,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:36:05,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:36:05,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:36:08,650 INFO L130 PetriNetUnfolder]: 2058/12180 cut-off events. [2022-11-20 10:36:08,650 INFO L131 PetriNetUnfolder]: For 51535/52041 co-relation queries the response was YES. [2022-11-20 10:36:08,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31750 conditions, 12180 events. 2058/12180 cut-off events. For 51535/52041 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 148338 event pairs, 731 based on Foata normal form. 167/11225 useless extension candidates. Maximal degree in co-relation 31688. Up to 1889 conditions per place. [2022-11-20 10:36:08,791 INFO L137 encePairwiseOnDemand]: 253/273 looper letters, 406 selfloop transitions, 112 changer transitions 38/767 dead transitions. [2022-11-20 10:36:08,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 767 transitions, 9704 flow [2022-11-20 10:36:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:36:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:36:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2774 transitions. [2022-11-20 10:36:08,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7816286277824739 [2022-11-20 10:36:08,801 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2774 transitions. [2022-11-20 10:36:08,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2774 transitions. [2022-11-20 10:36:08,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:36:08,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2774 transitions. [2022-11-20 10:36:08,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 213.3846153846154) internal successors, (2774), 13 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states 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 10:36:08,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:08,821 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:08,821 INFO L175 Difference]: Start difference. First operand has 360 places, 559 transitions, 5815 flow. Second operand 13 states and 2774 transitions. [2022-11-20 10:36:08,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 767 transitions, 9704 flow [2022-11-20 10:36:09,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 767 transitions, 9239 flow, removed 211 selfloop flow, removed 5 redundant places. [2022-11-20 10:36:09,133 INFO L231 Difference]: Finished difference. Result has 373 places, 601 transitions, 6610 flow [2022-11-20 10:36:09,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6610, PETRI_PLACES=373, PETRI_TRANSITIONS=601} [2022-11-20 10:36:09,135 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 123 predicate places. [2022-11-20 10:36:09,135 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 601 transitions, 6610 flow [2022-11-20 10:36:09,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:36:09,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:36:09,136 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:09,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:36:09,137 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:36:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1051109360, now seen corresponding path program 10 times [2022-11-20 10:36:09,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:09,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633640119] [2022-11-20 10:36:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:09,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:36:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:09,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633640119] [2022-11-20 10:36:09,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633640119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:09,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:09,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 10:36:09,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535919502] [2022-11-20 10:36:09,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:09,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:36:09,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:36:09,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:36:09,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:36:09,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 601 transitions, 6610 flow. Second operand has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states 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 10:36:09,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:36:09,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:36:09,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:36:13,028 INFO L130 PetriNetUnfolder]: 2052/12275 cut-off events. [2022-11-20 10:36:13,028 INFO L131 PetriNetUnfolder]: For 54830/55350 co-relation queries the response was YES. [2022-11-20 10:36:13,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32453 conditions, 12275 events. 2052/12275 cut-off events. For 54830/55350 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 150342 event pairs, 645 based on Foata normal form. 175/11320 useless extension candidates. Maximal degree in co-relation 32385. Up to 1225 conditions per place. [2022-11-20 10:36:13,136 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 317 selfloop transitions, 213 changer transitions 26/767 dead transitions. [2022-11-20 10:36:13,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 767 transitions, 9646 flow [2022-11-20 10:36:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:36:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 10:36:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2577 transitions. [2022-11-20 10:36:13,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7866300366300366 [2022-11-20 10:36:13,143 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2577 transitions. [2022-11-20 10:36:13,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2577 transitions. [2022-11-20 10:36:13,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:36:13,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2577 transitions. [2022-11-20 10:36:13,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.75) internal successors, (2577), 12 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states 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 10:36:13,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 273.0) internal successors, (3549), 13 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states 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 10:36:13,161 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 273.0) internal successors, (3549), 13 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states 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 10:36:13,161 INFO L175 Difference]: Start difference. First operand has 373 places, 601 transitions, 6610 flow. Second operand 12 states and 2577 transitions. [2022-11-20 10:36:13,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 767 transitions, 9646 flow [2022-11-20 10:36:13,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 767 transitions, 9492 flow, removed 77 selfloop flow, removed 4 redundant places. [2022-11-20 10:36:13,507 INFO L231 Difference]: Finished difference. Result has 383 places, 637 transitions, 7673 flow [2022-11-20 10:36:13,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6500, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7673, PETRI_PLACES=383, PETRI_TRANSITIONS=637} [2022-11-20 10:36:13,509 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 133 predicate places. [2022-11-20 10:36:13,509 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 637 transitions, 7673 flow [2022-11-20 10:36:13,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states 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 10:36:13,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:36:13,510 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:13,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:36:13,511 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:36:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1584770410, now seen corresponding path program 11 times [2022-11-20 10:36:13,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:13,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973837666] [2022-11-20 10:36:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:13,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:36:14,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:14,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973837666] [2022-11-20 10:36:14,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973837666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:14,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:14,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 10:36:14,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232273426] [2022-11-20 10:36:14,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:14,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:36:14,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:14,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:36:14,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:36:14,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:36:14,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 637 transitions, 7673 flow. Second operand has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:36:14,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:36:14,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:36:14,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:36:17,693 INFO L130 PetriNetUnfolder]: 2047/12826 cut-off events. [2022-11-20 10:36:17,693 INFO L131 PetriNetUnfolder]: For 61654/62096 co-relation queries the response was YES. [2022-11-20 10:36:17,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34042 conditions, 12826 events. 2047/12826 cut-off events. For 61654/62096 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 159023 event pairs, 594 based on Foata normal form. 171/11820 useless extension candidates. Maximal degree in co-relation 33970. Up to 1165 conditions per place. [2022-11-20 10:36:17,861 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 299 selfloop transitions, 248 changer transitions 26/784 dead transitions. [2022-11-20 10:36:17,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 784 transitions, 10446 flow [2022-11-20 10:36:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:36:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:36:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2789 transitions. [2022-11-20 10:36:17,870 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7858551704705551 [2022-11-20 10:36:17,871 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2789 transitions. [2022-11-20 10:36:17,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2789 transitions. [2022-11-20 10:36:17,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:36:17,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2789 transitions. [2022-11-20 10:36:17,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.53846153846155) internal successors, (2789), 13 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states 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 10:36:17,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:17,888 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:17,888 INFO L175 Difference]: Start difference. First operand has 383 places, 637 transitions, 7673 flow. Second operand 13 states and 2789 transitions. [2022-11-20 10:36:17,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 784 transitions, 10446 flow [2022-11-20 10:36:18,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 784 transitions, 9664 flow, removed 237 selfloop flow, removed 7 redundant places. [2022-11-20 10:36:18,179 INFO L231 Difference]: Finished difference. Result has 392 places, 657 transitions, 8036 flow [2022-11-20 10:36:18,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6972, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8036, PETRI_PLACES=392, PETRI_TRANSITIONS=657} [2022-11-20 10:36:18,181 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 142 predicate places. [2022-11-20 10:36:18,181 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 657 transitions, 8036 flow [2022-11-20 10:36:18,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 205.54545454545453) internal successors, (2261), 11 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 10:36:18,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:36:18,182 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:18,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 10:36:18,182 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:36:18,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash 343721143, now seen corresponding path program 1 times [2022-11-20 10:36:18,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:18,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635445806] [2022-11-20 10:36:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:36:18,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635445806] [2022-11-20 10:36:18,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635445806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:18,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:18,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 10:36:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096064819] [2022-11-20 10:36:18,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:18,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:36:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:36:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:36:18,534 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 273 [2022-11-20 10:36:18,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 657 transitions, 8036 flow. Second operand has 8 states, 8 states have (on average 202.875) internal successors, (1623), 8 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 10:36:18,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:36:18,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 273 [2022-11-20 10:36:18,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:36:24,447 INFO L130 PetriNetUnfolder]: 4288/24365 cut-off events. [2022-11-20 10:36:24,447 INFO L131 PetriNetUnfolder]: For 105992/106368 co-relation queries the response was YES. [2022-11-20 10:36:24,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60148 conditions, 24365 events. 4288/24365 cut-off events. For 105992/106368 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 328626 event pairs, 954 based on Foata normal form. 176/22572 useless extension candidates. Maximal degree in co-relation 60072. Up to 2217 conditions per place. [2022-11-20 10:36:25,090 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 458 selfloop transitions, 87 changer transitions 12/982 dead transitions. [2022-11-20 10:36:25,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 982 transitions, 12939 flow [2022-11-20 10:36:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:36:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:36:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2791 transitions. [2022-11-20 10:36:25,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7864187094956325 [2022-11-20 10:36:25,100 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2791 transitions. [2022-11-20 10:36:25,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2791 transitions. [2022-11-20 10:36:25,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:36:25,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2791 transitions. [2022-11-20 10:36:25,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 214.69230769230768) internal successors, (2791), 13 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states 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 10:36:25,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:25,116 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states 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 10:36:25,117 INFO L175 Difference]: Start difference. First operand has 392 places, 657 transitions, 8036 flow. Second operand 13 states and 2791 transitions. [2022-11-20 10:36:25,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 982 transitions, 12939 flow [2022-11-20 10:36:25,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 982 transitions, 12254 flow, removed 189 selfloop flow, removed 9 redundant places. [2022-11-20 10:36:25,928 INFO L231 Difference]: Finished difference. Result has 398 places, 733 transitions, 8833 flow [2022-11-20 10:36:25,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=7606, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8833, PETRI_PLACES=398, PETRI_TRANSITIONS=733} [2022-11-20 10:36:25,930 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 148 predicate places. [2022-11-20 10:36:25,930 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 733 transitions, 8833 flow [2022-11-20 10:36:25,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 202.875) internal successors, (1623), 8 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 10:36:25,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:36:25,931 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 10:36:25,931 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:36:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash 267159043, now seen corresponding path program 2 times [2022-11-20 10:36:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:25,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693212103] [2022-11-20 10:36:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:36:26,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:26,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693212103] [2022-11-20 10:36:26,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693212103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:26,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:26,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 10:36:26,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066728260] [2022-11-20 10:36:26,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:26,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:36:26,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:26,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:36:26,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:36:26,307 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 273 [2022-11-20 10:36:26,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 733 transitions, 8833 flow. Second operand has 8 states, 8 states have (on average 202.875) internal successors, (1623), 8 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 10:36:26,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:36:26,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 273 [2022-11-20 10:36:26,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:36:34,514 INFO L130 PetriNetUnfolder]: 6054/32245 cut-off events. [2022-11-20 10:36:34,514 INFO L131 PetriNetUnfolder]: For 155674/156631 co-relation queries the response was YES. [2022-11-20 10:36:34,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86039 conditions, 32245 events. 6054/32245 cut-off events. For 155674/156631 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 456260 event pairs, 1746 based on Foata normal form. 188/30610 useless extension candidates. Maximal degree in co-relation 85962. Up to 6205 conditions per place. [2022-11-20 10:36:34,989 INFO L137 encePairwiseOnDemand]: 255/273 looper letters, 483 selfloop transitions, 119 changer transitions 15/1042 dead transitions. [2022-11-20 10:36:34,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1042 transitions, 13546 flow [2022-11-20 10:36:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:36:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:36:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1977 transitions. [2022-11-20 10:36:34,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8046398046398047 [2022-11-20 10:36:34,992 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1977 transitions. [2022-11-20 10:36:34,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1977 transitions. [2022-11-20 10:36:34,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:36:34,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1977 transitions. [2022-11-20 10:36:34,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 219.66666666666666) internal successors, (1977), 9 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 10:36:35,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states 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 10:36:35,002 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states 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 10:36:35,002 INFO L175 Difference]: Start difference. First operand has 398 places, 733 transitions, 8833 flow. Second operand 9 states and 1977 transitions. [2022-11-20 10:36:35,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1042 transitions, 13546 flow [2022-11-20 10:36:36,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1042 transitions, 13512 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-11-20 10:36:36,319 INFO L231 Difference]: Finished difference. Result has 412 places, 796 transitions, 10138 flow [2022-11-20 10:36:36,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=8807, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10138, PETRI_PLACES=412, PETRI_TRANSITIONS=796} [2022-11-20 10:36:36,320 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 162 predicate places. [2022-11-20 10:36:36,321 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 796 transitions, 10138 flow [2022-11-20 10:36:36,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 202.875) internal successors, (1623), 8 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 10:36:36,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:36:36,322 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 10:36:36,322 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:36:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1077288087, now seen corresponding path program 3 times [2022-11-20 10:36:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:36,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618983420] [2022-11-20 10:36:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:36,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:36:36,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:36,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618983420] [2022-11-20 10:36:36,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618983420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:36,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:36,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 10:36:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475757497] [2022-11-20 10:36:36,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:36,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:36:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:36:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:36:36,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 273 [2022-11-20 10:36:36,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 796 transitions, 10138 flow. Second operand has 8 states, 8 states have (on average 202.875) internal successors, (1623), 8 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 10:36:36,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:36:36,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 273 [2022-11-20 10:36:36,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand