./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/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_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a --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-b5237d8 [2022-11-21 16:07:58,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:07:58,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:07:58,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:07:58,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:07:58,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:07:58,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:07:58,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:07:58,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:07:58,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:07:58,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:07:58,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:07:58,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:07:58,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:07:58,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:07:58,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:07:58,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:07:58,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:07:58,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:07:58,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:07:58,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:07:58,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:07:58,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:07:58,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:07:58,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:07:58,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:07:58,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:07:58,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:07:58,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:07:58,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:07:58,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:07:58,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:07:58,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:07:58,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:07:58,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:07:58,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:07:58,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:07:58,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:07:58,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:07:58,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:07:58,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:07:58,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:07:58,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:07:58,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:07:58,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:07:58,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:07:58,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:07:58,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:07:58,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:07:58,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:07:58,909 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:07:58,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:07:58,911 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:07:58,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:07:58,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:07:58,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:07:58,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:07:58,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:07:58,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:07:58,913 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:07:58,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:07:58,913 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:07:58,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:07:58,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:07:58,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:07:58,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:07:58,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:07:58,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:07:58,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:07:58,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:07:58,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:07:58,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:07:58,918 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:07:58,918 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:07:58,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:07:58,919 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_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2022-11-21 16:07:59,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:07:59,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:07:59,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:07:59,350 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:07:59,351 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:07:59,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-11-21 16:08:02,635 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:08:02,911 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:08:02,926 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-11-21 16:08:02,935 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/data/17d341e86/60e798d9746045c3bbe1796d3a2329a1/FLAG8bec530d8 [2022-11-21 16:08:02,960 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/data/17d341e86/60e798d9746045c3bbe1796d3a2329a1 [2022-11-21 16:08:02,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:08:02,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:08:02,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:08:02,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:08:02,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:08:02,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:08:02" (1/1) ... [2022-11-21 16:08:02,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d6de09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:02, skipping insertion in model container [2022-11-21 16:08:02,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:08:02" (1/1) ... [2022-11-21 16:08:02,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:08:03,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:08:03,320 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_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-11-21 16:08:03,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:08:03,344 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:08:03,380 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_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-11-21 16:08:03,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:08:03,414 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:08:03,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03 WrapperNode [2022-11-21 16:08:03,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:08:03,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:08:03,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:08:03,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:08:03,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,465 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2022-11-21 16:08:03,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:08:03,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:08:03,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:08:03,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:08:03,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,521 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:08:03,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:08:03,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:08:03,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:08:03,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (1/1) ... [2022-11-21 16:08:03,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:08:03,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:03,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:08:03,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:08:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:08:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:08:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:08:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:08:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:08:03,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:08:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:08:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:08:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:08:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:08:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:08:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:08:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:08:03,629 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:08:03,745 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:08:03,747 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:08:04,232 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:08:04,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:08:04,249 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:08:04,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:08:04 BoogieIcfgContainer [2022-11-21 16:08:04,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:08:04,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:08:04,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:08:04,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:08:04,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:08:02" (1/3) ... [2022-11-21 16:08:04,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42da3acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:08:04, skipping insertion in model container [2022-11-21 16:08:04,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:03" (2/3) ... [2022-11-21 16:08:04,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42da3acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:08:04, skipping insertion in model container [2022-11-21 16:08:04,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:08:04" (3/3) ... [2022-11-21 16:08:04,267 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-11-21 16:08:04,279 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:08:04,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:08:04,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:08:04,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:08:04,465 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:08:04,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 273 transitions, 562 flow [2022-11-21 16:08:04,673 INFO L130 PetriNetUnfolder]: 19/271 cut-off events. [2022-11-21 16:08:04,674 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:08:04,682 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. [2022-11-21 16:08:04,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 273 transitions, 562 flow [2022-11-21 16:08:04,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 262 transitions, 536 flow [2022-11-21 16:08:04,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:08:04,709 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;@192c0e09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:08:04,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 16:08:04,815 INFO L130 PetriNetUnfolder]: 19/261 cut-off events. [2022-11-21 16:08:04,815 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:08:04,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:04,817 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] [2022-11-21 16:08:04,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1330372674, now seen corresponding path program 1 times [2022-11-21 16:08:04,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:04,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743854248] [2022-11-21 16:08:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:04,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:05,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:05,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743854248] [2022-11-21 16:08:05,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743854248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:05,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:05,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:08:05,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846779964] [2022-11-21 16:08:05,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:05,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:08:05,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:08:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:08:05,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 273 [2022-11-21 16:08:05,208 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) [2022-11-21 16:08:05,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:05,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 273 [2022-11-21 16:08:05,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:05,277 INFO L130 PetriNetUnfolder]: 5/248 cut-off events. [2022-11-21 16:08:05,277 INFO L131 PetriNetUnfolder]: For 8/9 co-relation queries the response was YES. [2022-11-21 16:08:05,280 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. [2022-11-21 16:08:05,282 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 4 selfloop transitions, 0 changer transitions 3/248 dead transitions. [2022-11-21 16:08:05,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 248 transitions, 516 flow [2022-11-21 16:08:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:08:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:08:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 526 transitions. [2022-11-21 16:08:05,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9633699633699634 [2022-11-21 16:08:05,298 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 526 transitions. [2022-11-21 16:08:05,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 526 transitions. [2022-11-21 16:08:05,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:05,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 526 transitions. [2022-11-21 16:08:05,308 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) [2022-11-21 16:08:05,326 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) [2022-11-21 16:08:05,326 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) [2022-11-21 16:08:05,328 INFO L175 Difference]: Start difference. First operand has 250 places, 262 transitions, 536 flow. Second operand 2 states and 526 transitions. [2022-11-21 16:08:05,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 248 transitions, 516 flow [2022-11-21 16:08:05,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 248 transitions, 508 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:08:05,344 INFO L231 Difference]: Finished difference. Result has 247 places, 245 transitions, 494 flow [2022-11-21 16:08:05,347 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} [2022-11-21 16:08:05,353 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, -3 predicate places. [2022-11-21 16:08:05,353 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 245 transitions, 494 flow [2022-11-21 16:08:05,354 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) [2022-11-21 16:08:05,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:05,355 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] [2022-11-21 16:08:05,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:08:05,356 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:05,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1248035611, now seen corresponding path program 1 times [2022-11-21 16:08:05,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:05,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264851333] [2022-11-21 16:08:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:05,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:05,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:05,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264851333] [2022-11-21 16:08:05,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264851333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:05,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:05,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:08:05,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853419458] [2022-11-21 16:08:05,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:05,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:08:05,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:08:05,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:08:05,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 273 [2022-11-21 16:08:05,861 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) [2022-11-21 16:08:05,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:05,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 273 [2022-11-21 16:08:05,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:05,988 INFO L130 PetriNetUnfolder]: 5/251 cut-off events. [2022-11-21 16:08:05,988 INFO L131 PetriNetUnfolder]: For 2/3 co-relation queries the response was YES. [2022-11-21 16:08:05,991 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. [2022-11-21 16:08:05,992 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 16 selfloop transitions, 4 changer transitions 0/249 dead transitions. [2022-11-21 16:08:05,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 249 transitions, 542 flow [2022-11-21 16:08:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:08:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:08:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1231 transitions. [2022-11-21 16:08:05,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9018315018315018 [2022-11-21 16:08:05,998 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1231 transitions. [2022-11-21 16:08:05,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1231 transitions. [2022-11-21 16:08:05,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:06,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1231 transitions. [2022-11-21 16:08:06,003 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) [2022-11-21 16:08:06,010 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) [2022-11-21 16:08:06,011 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) [2022-11-21 16:08:06,012 INFO L175 Difference]: Start difference. First operand has 247 places, 245 transitions, 494 flow. Second operand 5 states and 1231 transitions. [2022-11-21 16:08:06,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 249 transitions, 542 flow [2022-11-21 16:08:06,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 249 transitions, 542 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:08:06,025 INFO L231 Difference]: Finished difference. Result has 249 places, 246 transitions, 510 flow [2022-11-21 16:08:06,026 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} [2022-11-21 16:08:06,027 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, -1 predicate places. [2022-11-21 16:08:06,028 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 246 transitions, 510 flow [2022-11-21 16:08:06,029 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) [2022-11-21 16:08:06,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:06,030 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] [2022-11-21 16:08:06,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:08:06,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1905021540, now seen corresponding path program 1 times [2022-11-21 16:08:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:06,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628234413] [2022-11-21 16:08:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:06,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628234413] [2022-11-21 16:08:06,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628234413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:06,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801015513] [2022-11-21 16:08:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:06,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:06,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:06,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:06,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:08:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:08:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:06,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:06,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801015513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:06,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:06,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-21 16:08:06,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719266855] [2022-11-21 16:08:06,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:06,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:08:06,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:06,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:08:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:08:06,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 273 [2022-11-21 16:08:06,972 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) [2022-11-21 16:08:06,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:06,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 273 [2022-11-21 16:08:06,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:07,263 INFO L130 PetriNetUnfolder]: 5/260 cut-off events. [2022-11-21 16:08:07,264 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-21 16:08:07,266 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. [2022-11-21 16:08:07,267 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 17 selfloop transitions, 11 changer transitions 0/256 dead transitions. [2022-11-21 16:08:07,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 256 transitions, 588 flow [2022-11-21 16:08:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:08:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-21 16:08:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2681 transitions. [2022-11-21 16:08:07,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8927738927738927 [2022-11-21 16:08:07,274 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2681 transitions. [2022-11-21 16:08:07,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2681 transitions. [2022-11-21 16:08:07,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:07,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2681 transitions. [2022-11-21 16:08:07,283 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) [2022-11-21 16:08:07,289 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) [2022-11-21 16:08:07,292 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) [2022-11-21 16:08:07,293 INFO L175 Difference]: Start difference. First operand has 249 places, 246 transitions, 510 flow. Second operand 11 states and 2681 transitions. [2022-11-21 16:08:07,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 256 transitions, 588 flow [2022-11-21 16:08:07,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 256 transitions, 582 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:08:07,320 INFO L231 Difference]: Finished difference. Result has 259 places, 252 transitions, 559 flow [2022-11-21 16:08:07,321 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} [2022-11-21 16:08:07,322 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 9 predicate places. [2022-11-21 16:08:07,322 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 252 transitions, 559 flow [2022-11-21 16:08:07,325 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) [2022-11-21 16:08:07,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:07,326 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] [2022-11-21 16:08:07,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:07,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e004c66-5aa3-4b1d-8c8f-083ee6df358d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:07,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -289871036, now seen corresponding path program 2 times [2022-11-21 16:08:07,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:07,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129169756] [2022-11-21 16:08:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:07,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:08,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:08,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129169756] [2022-11-21 16:08:08,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129169756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:08,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:08,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 16:08:08,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479415129] [2022-11-21 16:08:08,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:08,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:08:08,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:08:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:08,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:08,496 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) [2022-11-21 16:08:08,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:08,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:08,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:09,721 INFO L130 PetriNetUnfolder]: 392/2360 cut-off events. [2022-11-21 16:08:09,725 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-21 16:08:09,736 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. [2022-11-21 16:08:09,749 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 129 selfloop transitions, 20 changer transitions 15/363 dead transitions. [2022-11-21 16:08:09,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 363 transitions, 1119 flow [2022-11-21 16:08:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:08:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2791 transitions. [2022-11-21 16:08:09,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7864187094956325 [2022-11-21 16:08:09,757 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2791 transitions. [2022-11-21 16:08:09,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2791 transitions. [2022-11-21 16:08:09,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:09,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2791 transitions. [2022-11-21 16:08:09,771 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) [2022-11-21 16:08:09,782 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) [2022-11-21 16:08:09,784 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) [2022-11-21 16:08:09,784 INFO L175 Difference]: Start difference. First operand has 259 places, 252 transitions, 559 flow. Second operand 13 states and 2791 transitions. [2022-11-21 16:08:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 363 transitions, 1119 flow [2022-11-21 16:08:09,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 363 transitions, 1110 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-21 16:08:09,795 INFO L231 Difference]: Finished difference. Result has 278 places, 266 transitions, 687 flow [2022-11-21 16:08:09,795 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} [2022-11-21 16:08:09,796 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 28 predicate places. [2022-11-21 16:08:09,797 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 266 transitions, 687 flow [2022-11-21 16:08:09,798 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) [2022-11-21 16:08:09,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:09,799 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] [2022-11-21 16:08:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:08:09,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:09,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash -399820642, now seen corresponding path program 3 times [2022-11-21 16:08:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:09,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300782458] [2022-11-21 16:08:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:09,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:10,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300782458] [2022-11-21 16:08:10,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300782458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:10,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:10,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 16:08:10,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356568872] [2022-11-21 16:08:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:10,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:08:10,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:10,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:08:10,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:10,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:10,590 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) [2022-11-21 16:08:10,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:10,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:10,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:12,294 INFO L130 PetriNetUnfolder]: 732/4397 cut-off events. [2022-11-21 16:08:12,294 INFO L131 PetriNetUnfolder]: For 1275/1299 co-relation queries the response was YES. [2022-11-21 16:08:12,311 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. [2022-11-21 16:08:12,329 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 160 selfloop transitions, 26 changer transitions 16/403 dead transitions. [2022-11-21 16:08:12,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 403 transitions, 1666 flow [2022-11-21 16:08:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:08:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2793 transitions. [2022-11-21 16:08:12,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7869822485207101 [2022-11-21 16:08:12,336 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2793 transitions. [2022-11-21 16:08:12,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2793 transitions. [2022-11-21 16:08:12,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:12,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2793 transitions. [2022-11-21 16:08:12,345 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) [2022-11-21 16:08:12,352 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) [2022-11-21 16:08:12,354 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) [2022-11-21 16:08:12,354 INFO L175 Difference]: Start difference. First operand has 278 places, 266 transitions, 687 flow. Second operand 13 states and 2793 transitions. [2022-11-21 16:08:12,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 403 transitions, 1666 flow [2022-11-21 16:08:12,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 403 transitions, 1616 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-11-21 16:08:12,371 INFO L231 Difference]: Finished difference. Result has 292 places, 280 transitions, 862 flow [2022-11-21 16:08:12,372 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} [2022-11-21 16:08:12,373 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 42 predicate places. [2022-11-21 16:08:12,373 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 280 transitions, 862 flow [2022-11-21 16:08:12,374 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) [2022-11-21 16:08:12,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:12,375 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] [2022-11-21 16:08:12,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:08:12,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:12,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1393851772, now seen corresponding path program 4 times [2022-11-21 16:08:12,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:12,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776297099] [2022-11-21 16:08:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:13,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:13,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776297099] [2022-11-21 16:08:13,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776297099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:13,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:13,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:08:13,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120626583] [2022-11-21 16:08:13,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:13,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:13,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:13,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:13,123 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) [2022-11-21 16:08:13,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:13,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:13,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:15,466 INFO L130 PetriNetUnfolder]: 1043/6502 cut-off events. [2022-11-21 16:08:15,467 INFO L131 PetriNetUnfolder]: For 5238/5289 co-relation queries the response was YES. [2022-11-21 16:08:15,507 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. [2022-11-21 16:08:15,535 INFO L137 encePairwiseOnDemand]: 250/273 looper letters, 136 selfloop transitions, 67 changer transitions 17/421 dead transitions. [2022-11-21 16:08:15,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 421 transitions, 2162 flow [2022-11-21 16:08:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:08:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:08:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2988 transitions. [2022-11-21 16:08:15,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7817896389324961 [2022-11-21 16:08:15,543 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2988 transitions. [2022-11-21 16:08:15,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2988 transitions. [2022-11-21 16:08:15,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:15,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2988 transitions. [2022-11-21 16:08:15,552 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) [2022-11-21 16:08:15,561 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) [2022-11-21 16:08:15,573 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) [2022-11-21 16:08:15,583 INFO L175 Difference]: Start difference. First operand has 292 places, 280 transitions, 862 flow. Second operand 14 states and 2988 transitions. [2022-11-21 16:08:15,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 421 transitions, 2162 flow [2022-11-21 16:08:15,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 421 transitions, 2101 flow, removed 22 selfloop flow, removed 4 redundant places. [2022-11-21 16:08:15,623 INFO L231 Difference]: Finished difference. Result has 308 places, 332 transitions, 1495 flow [2022-11-21 16:08:15,624 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} [2022-11-21 16:08:15,628 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 58 predicate places. [2022-11-21 16:08:15,628 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 332 transitions, 1495 flow [2022-11-21 16:08:15,631 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) [2022-11-21 16:08:15,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:15,634 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] [2022-11-21 16:08:15,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:08:15,635 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1565977938, now seen corresponding path program 5 times [2022-11-21 16:08:15,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:15,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352781469] [2022-11-21 16:08:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:16,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:16,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352781469] [2022-11-21 16:08:16,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352781469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:16,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:16,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 16:08:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436646892] [2022-11-21 16:08:16,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:16,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:08:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:08:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:16,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:16,349 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) [2022-11-21 16:08:16,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:16,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:16,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:19,233 INFO L130 PetriNetUnfolder]: 1254/7713 cut-off events. [2022-11-21 16:08:19,233 INFO L131 PetriNetUnfolder]: For 10424/10538 co-relation queries the response was YES. [2022-11-21 16:08:19,297 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. [2022-11-21 16:08:19,401 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 185 selfloop transitions, 83 changer transitions 20/494 dead transitions. [2022-11-21 16:08:19,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 494 transitions, 3393 flow [2022-11-21 16:08:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:08:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-21 16:08:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2580 transitions. [2022-11-21 16:08:19,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7875457875457875 [2022-11-21 16:08:19,410 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2580 transitions. [2022-11-21 16:08:19,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2580 transitions. [2022-11-21 16:08:19,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:19,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2580 transitions. [2022-11-21 16:08:19,419 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) [2022-11-21 16:08:19,425 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) [2022-11-21 16:08:19,427 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) [2022-11-21 16:08:19,428 INFO L175 Difference]: Start difference. First operand has 308 places, 332 transitions, 1495 flow. Second operand 12 states and 2580 transitions. [2022-11-21 16:08:19,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 494 transitions, 3393 flow [2022-11-21 16:08:19,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 494 transitions, 3305 flow, removed 44 selfloop flow, removed 2 redundant places. [2022-11-21 16:08:19,524 INFO L231 Difference]: Finished difference. Result has 321 places, 379 transitions, 2316 flow [2022-11-21 16:08:19,525 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} [2022-11-21 16:08:19,526 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 71 predicate places. [2022-11-21 16:08:19,526 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 379 transitions, 2316 flow [2022-11-21 16:08:19,527 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) [2022-11-21 16:08:19,527 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:19,527 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] [2022-11-21 16:08:19,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:08:19,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1532592448, now seen corresponding path program 6 times [2022-11-21 16:08:19,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:19,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723103582] [2022-11-21 16:08:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:20,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:20,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723103582] [2022-11-21 16:08:20,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723103582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:20,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:20,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:08:20,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154396266] [2022-11-21 16:08:20,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:20,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:20,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:20,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:20,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:20,218 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) [2022-11-21 16:08:20,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:20,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:20,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:23,358 INFO L130 PetriNetUnfolder]: 1617/10538 cut-off events. [2022-11-21 16:08:23,359 INFO L131 PetriNetUnfolder]: For 22311/22526 co-relation queries the response was YES. [2022-11-21 16:08:23,454 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. [2022-11-21 16:08:23,499 INFO L137 encePairwiseOnDemand]: 250/273 looper letters, 211 selfloop transitions, 153 changer transitions 16/586 dead transitions. [2022-11-21 16:08:23,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 586 transitions, 5144 flow [2022-11-21 16:08:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:08:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:08:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2989 transitions. [2022-11-21 16:08:23,509 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.782051282051282 [2022-11-21 16:08:23,509 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2989 transitions. [2022-11-21 16:08:23,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2989 transitions. [2022-11-21 16:08:23,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:23,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2989 transitions. [2022-11-21 16:08:23,519 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) [2022-11-21 16:08:23,526 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) [2022-11-21 16:08:23,528 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) [2022-11-21 16:08:23,529 INFO L175 Difference]: Start difference. First operand has 321 places, 379 transitions, 2316 flow. Second operand 14 states and 2989 transitions. [2022-11-21 16:08:23,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 586 transitions, 5144 flow [2022-11-21 16:08:23,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 586 transitions, 4706 flow, removed 106 selfloop flow, removed 8 redundant places. [2022-11-21 16:08:23,652 INFO L231 Difference]: Finished difference. Result has 333 places, 472 transitions, 3622 flow [2022-11-21 16:08:23,653 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} [2022-11-21 16:08:23,654 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 83 predicate places. [2022-11-21 16:08:23,654 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 472 transitions, 3622 flow [2022-11-21 16:08:23,655 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) [2022-11-21 16:08:23,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:23,656 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] [2022-11-21 16:08:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:08:23,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1466386516, now seen corresponding path program 7 times [2022-11-21 16:08:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:23,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278927676] [2022-11-21 16:08:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:23,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:24,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:24,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278927676] [2022-11-21 16:08:24,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278927676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:24,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:24,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:08:24,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925234780] [2022-11-21 16:08:24,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:24,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:24,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:24,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:24,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:24,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:24,465 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) [2022-11-21 16:08:24,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:24,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:24,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:27,934 INFO L130 PetriNetUnfolder]: 1744/10999 cut-off events. [2022-11-21 16:08:27,935 INFO L131 PetriNetUnfolder]: For 30885/31345 co-relation queries the response was YES. [2022-11-21 16:08:28,002 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. [2022-11-21 16:08:28,049 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 256 selfloop transitions, 164 changer transitions 20/646 dead transitions. [2022-11-21 16:08:28,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 646 transitions, 6423 flow [2022-11-21 16:08:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:08:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2792 transitions. [2022-11-21 16:08:28,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7867004790081713 [2022-11-21 16:08:28,057 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2792 transitions. [2022-11-21 16:08:28,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2792 transitions. [2022-11-21 16:08:28,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:28,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2792 transitions. [2022-11-21 16:08:28,066 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) [2022-11-21 16:08:28,073 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) [2022-11-21 16:08:28,075 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) [2022-11-21 16:08:28,075 INFO L175 Difference]: Start difference. First operand has 333 places, 472 transitions, 3622 flow. Second operand 13 states and 2792 transitions. [2022-11-21 16:08:28,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 646 transitions, 6423 flow [2022-11-21 16:08:28,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 646 transitions, 6141 flow, removed 141 selfloop flow, removed 4 redundant places. [2022-11-21 16:08:28,485 INFO L231 Difference]: Finished difference. Result has 347 places, 510 transitions, 4698 flow [2022-11-21 16:08:28,486 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} [2022-11-21 16:08:28,487 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 97 predicate places. [2022-11-21 16:08:28,488 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 510 transitions, 4698 flow [2022-11-21 16:08:28,489 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) [2022-11-21 16:08:28,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:28,490 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] [2022-11-21 16:08:28,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:08:28,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash 31191990, now seen corresponding path program 8 times [2022-11-21 16:08:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3943614] [2022-11-21 16:08:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:29,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3943614] [2022-11-21 16:08:29,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3943614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:29,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:29,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:08:29,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323546380] [2022-11-21 16:08:29,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:29,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:29,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:29,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:29,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:29,172 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) [2022-11-21 16:08:29,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:29,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:29,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:32,499 INFO L130 PetriNetUnfolder]: 1811/11610 cut-off events. [2022-11-21 16:08:32,499 INFO L131 PetriNetUnfolder]: For 41869/42331 co-relation queries the response was YES. [2022-11-21 16:08:32,575 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. [2022-11-21 16:08:32,636 INFO L137 encePairwiseOnDemand]: 251/273 looper letters, 337 selfloop transitions, 107 changer transitions 16/666 dead transitions. [2022-11-21 16:08:32,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 666 transitions, 7601 flow [2022-11-21 16:08:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:08:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2778 transitions. [2022-11-21 16:08:32,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7827557058326289 [2022-11-21 16:08:32,646 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2778 transitions. [2022-11-21 16:08:32,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2778 transitions. [2022-11-21 16:08:32,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:32,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2778 transitions. [2022-11-21 16:08:32,656 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) [2022-11-21 16:08:32,664 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) [2022-11-21 16:08:32,665 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) [2022-11-21 16:08:32,666 INFO L175 Difference]: Start difference. First operand has 347 places, 510 transitions, 4698 flow. Second operand 13 states and 2778 transitions. [2022-11-21 16:08:32,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 666 transitions, 7601 flow [2022-11-21 16:08:32,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 666 transitions, 7263 flow, removed 114 selfloop flow, removed 6 redundant places. [2022-11-21 16:08:32,971 INFO L231 Difference]: Finished difference. Result has 360 places, 559 transitions, 5815 flow [2022-11-21 16:08:32,973 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} [2022-11-21 16:08:32,974 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 110 predicate places. [2022-11-21 16:08:32,974 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 559 transitions, 5815 flow [2022-11-21 16:08:32,975 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) [2022-11-21 16:08:32,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:32,975 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] [2022-11-21 16:08:32,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:08:32,976 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1744548376, now seen corresponding path program 9 times [2022-11-21 16:08:32,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:32,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085947595] [2022-11-21 16:08:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:32,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:33,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085947595] [2022-11-21 16:08:33,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085947595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:33,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:33,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:08:33,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089386198] [2022-11-21 16:08:33,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:33,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:33,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:33,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:33,818 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) [2022-11-21 16:08:33,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:33,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:33,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:37,294 INFO L130 PetriNetUnfolder]: 2058/12180 cut-off events. [2022-11-21 16:08:37,294 INFO L131 PetriNetUnfolder]: For 51535/52041 co-relation queries the response was YES. [2022-11-21 16:08:37,384 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. [2022-11-21 16:08:37,440 INFO L137 encePairwiseOnDemand]: 253/273 looper letters, 406 selfloop transitions, 112 changer transitions 38/767 dead transitions. [2022-11-21 16:08:37,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 767 transitions, 9704 flow [2022-11-21 16:08:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:08:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2774 transitions. [2022-11-21 16:08:37,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7816286277824739 [2022-11-21 16:08:37,448 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2774 transitions. [2022-11-21 16:08:37,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2774 transitions. [2022-11-21 16:08:37,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:37,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2774 transitions. [2022-11-21 16:08:37,457 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) [2022-11-21 16:08:37,464 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) [2022-11-21 16:08:37,466 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) [2022-11-21 16:08:37,466 INFO L175 Difference]: Start difference. First operand has 360 places, 559 transitions, 5815 flow. Second operand 13 states and 2774 transitions. [2022-11-21 16:08:37,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 767 transitions, 9704 flow [2022-11-21 16:08:37,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 767 transitions, 9239 flow, removed 211 selfloop flow, removed 5 redundant places. [2022-11-21 16:08:37,850 INFO L231 Difference]: Finished difference. Result has 373 places, 601 transitions, 6610 flow [2022-11-21 16:08:37,851 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} [2022-11-21 16:08:37,852 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 123 predicate places. [2022-11-21 16:08:37,852 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 601 transitions, 6610 flow [2022-11-21 16:08:37,853 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) [2022-11-21 16:08:37,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:37,853 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] [2022-11-21 16:08:37,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:08:37,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:37,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:37,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1051109360, now seen corresponding path program 10 times [2022-11-21 16:08:37,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:37,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836056124] [2022-11-21 16:08:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:37,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:38,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836056124] [2022-11-21 16:08:38,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836056124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:38,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:38,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 16:08:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174669585] [2022-11-21 16:08:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:38,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:08:38,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:08:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:38,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:38,611 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) [2022-11-21 16:08:38,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:38,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:38,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:42,315 INFO L130 PetriNetUnfolder]: 2052/12275 cut-off events. [2022-11-21 16:08:42,315 INFO L131 PetriNetUnfolder]: For 54830/55350 co-relation queries the response was YES. [2022-11-21 16:08:42,414 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. [2022-11-21 16:08:42,455 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 317 selfloop transitions, 213 changer transitions 26/767 dead transitions. [2022-11-21 16:08:42,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 767 transitions, 9646 flow [2022-11-21 16:08:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:08:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-21 16:08:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2577 transitions. [2022-11-21 16:08:42,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7866300366300366 [2022-11-21 16:08:42,463 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2577 transitions. [2022-11-21 16:08:42,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2577 transitions. [2022-11-21 16:08:42,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:42,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2577 transitions. [2022-11-21 16:08:42,472 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) [2022-11-21 16:08:42,478 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) [2022-11-21 16:08:42,480 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) [2022-11-21 16:08:42,480 INFO L175 Difference]: Start difference. First operand has 373 places, 601 transitions, 6610 flow. Second operand 12 states and 2577 transitions. [2022-11-21 16:08:42,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 767 transitions, 9646 flow [2022-11-21 16:08:42,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 767 transitions, 9492 flow, removed 77 selfloop flow, removed 4 redundant places. [2022-11-21 16:08:42,824 INFO L231 Difference]: Finished difference. Result has 383 places, 637 transitions, 7673 flow [2022-11-21 16:08:42,825 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} [2022-11-21 16:08:42,826 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 133 predicate places. [2022-11-21 16:08:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 637 transitions, 7673 flow [2022-11-21 16:08:42,826 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) [2022-11-21 16:08:42,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:42,827 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] [2022-11-21 16:08:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:08:42,827 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1584770410, now seen corresponding path program 11 times [2022-11-21 16:08:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685728140] [2022-11-21 16:08:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:42,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:43,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685728140] [2022-11-21 16:08:43,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685728140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:43,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:43,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-21 16:08:43,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122774948] [2022-11-21 16:08:43,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:43,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:43,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-21 16:08:43,469 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) [2022-11-21 16:08:43,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:43,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-21 16:08:43,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:47,430 INFO L130 PetriNetUnfolder]: 2047/12826 cut-off events. [2022-11-21 16:08:47,430 INFO L131 PetriNetUnfolder]: For 61654/62096 co-relation queries the response was YES. [2022-11-21 16:08:47,521 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. [2022-11-21 16:08:47,555 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 299 selfloop transitions, 248 changer transitions 26/784 dead transitions. [2022-11-21 16:08:47,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 784 transitions, 10446 flow [2022-11-21 16:08:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:08:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2789 transitions. [2022-11-21 16:08:47,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7858551704705551 [2022-11-21 16:08:47,561 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2789 transitions. [2022-11-21 16:08:47,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2789 transitions. [2022-11-21 16:08:47,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:47,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2789 transitions. [2022-11-21 16:08:47,567 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) [2022-11-21 16:08:47,573 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) [2022-11-21 16:08:47,574 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) [2022-11-21 16:08:47,575 INFO L175 Difference]: Start difference. First operand has 383 places, 637 transitions, 7673 flow. Second operand 13 states and 2789 transitions. [2022-11-21 16:08:47,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 784 transitions, 10446 flow [2022-11-21 16:08:47,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 784 transitions, 9664 flow, removed 237 selfloop flow, removed 7 redundant places. [2022-11-21 16:08:47,916 INFO L231 Difference]: Finished difference. Result has 392 places, 657 transitions, 8036 flow [2022-11-21 16:08:47,918 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} [2022-11-21 16:08:47,918 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 142 predicate places. [2022-11-21 16:08:47,918 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 657 transitions, 8036 flow [2022-11-21 16:08:47,919 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) [2022-11-21 16:08:47,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:47,920 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] [2022-11-21 16:08:47,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:08:47,920 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:47,921 INFO L85 PathProgramCache]: Analyzing trace with hash 343721143, now seen corresponding path program 1 times [2022-11-21 16:08:47,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:47,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081008401] [2022-11-21 16:08:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:48,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081008401] [2022-11-21 16:08:48,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081008401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:48,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:48,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:08:48,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519914877] [2022-11-21 16:08:48,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:48,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:08:48,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:08:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:08:48,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 273 [2022-11-21 16:08:48,314 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) [2022-11-21 16:08:48,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:48,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 273 [2022-11-21 16:08:48,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:08:55,492 INFO L130 PetriNetUnfolder]: 4288/24365 cut-off events. [2022-11-21 16:08:55,492 INFO L131 PetriNetUnfolder]: For 105992/106368 co-relation queries the response was YES. [2022-11-21 16:08:55,728 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. [2022-11-21 16:08:55,820 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 458 selfloop transitions, 87 changer transitions 12/982 dead transitions. [2022-11-21 16:08:55,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 982 transitions, 12939 flow [2022-11-21 16:08:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:08:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2791 transitions. [2022-11-21 16:08:55,826 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7864187094956325 [2022-11-21 16:08:55,826 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2791 transitions. [2022-11-21 16:08:55,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2791 transitions. [2022-11-21 16:08:55,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:08:55,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2791 transitions. [2022-11-21 16:08:55,833 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) [2022-11-21 16:08:55,837 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) [2022-11-21 16:08:55,839 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) [2022-11-21 16:08:55,839 INFO L175 Difference]: Start difference. First operand has 392 places, 657 transitions, 8036 flow. Second operand 13 states and 2791 transitions. [2022-11-21 16:08:55,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 982 transitions, 12939 flow [2022-11-21 16:08:57,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 982 transitions, 12254 flow, removed 189 selfloop flow, removed 9 redundant places. [2022-11-21 16:08:57,315 INFO L231 Difference]: Finished difference. Result has 398 places, 733 transitions, 8833 flow [2022-11-21 16:08:57,316 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} [2022-11-21 16:08:57,316 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 148 predicate places. [2022-11-21 16:08:57,317 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 733 transitions, 8833 flow [2022-11-21 16:08:57,317 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) [2022-11-21 16:08:57,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:08:57,318 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] [2022-11-21 16:08:57,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:08:57,318 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:08:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash 267159043, now seen corresponding path program 2 times [2022-11-21 16:08:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:57,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351372606] [2022-11-21 16:08:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:57,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:57,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:57,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351372606] [2022-11-21 16:08:57,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351372606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:57,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:57,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:08:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780313158] [2022-11-21 16:08:57,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:57,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:08:57,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:08:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:08:57,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 273 [2022-11-21 16:08:57,828 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) [2022-11-21 16:08:57,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:08:57,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 273 [2022-11-21 16:08:57,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:09:07,692 INFO L130 PetriNetUnfolder]: 6054/32245 cut-off events. [2022-11-21 16:09:07,692 INFO L131 PetriNetUnfolder]: For 155674/156631 co-relation queries the response was YES. [2022-11-21 16:09:07,998 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. [2022-11-21 16:09:08,104 INFO L137 encePairwiseOnDemand]: 255/273 looper letters, 483 selfloop transitions, 119 changer transitions 15/1042 dead transitions. [2022-11-21 16:09:08,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1042 transitions, 13546 flow [2022-11-21 16:09:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:09:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:09:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1977 transitions. [2022-11-21 16:09:08,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8046398046398047 [2022-11-21 16:09:08,108 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1977 transitions. [2022-11-21 16:09:08,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1977 transitions. [2022-11-21 16:09:08,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:09:08,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1977 transitions. [2022-11-21 16:09:08,112 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) [2022-11-21 16:09:08,115 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) [2022-11-21 16:09:08,115 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) [2022-11-21 16:09:08,115 INFO L175 Difference]: Start difference. First operand has 398 places, 733 transitions, 8833 flow. Second operand 9 states and 1977 transitions. [2022-11-21 16:09:08,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1042 transitions, 13546 flow [2022-11-21 16:09:10,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1042 transitions, 13512 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-11-21 16:09:10,182 INFO L231 Difference]: Finished difference. Result has 412 places, 796 transitions, 10138 flow [2022-11-21 16:09:10,183 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} [2022-11-21 16:09:10,184 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 162 predicate places. [2022-11-21 16:09:10,184 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 796 transitions, 10138 flow [2022-11-21 16:09:10,185 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) [2022-11-21 16:09:10,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:09:10,185 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] [2022-11-21 16:09:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:09:10,186 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:09:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1077288087, now seen corresponding path program 3 times [2022-11-21 16:09:10,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:10,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272837786] [2022-11-21 16:09:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:09:10,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:10,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272837786] [2022-11-21 16:09:10,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272837786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:09:10,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:09:10,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:09:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871855767] [2022-11-21 16:09:10,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:09:10,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:09:10,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:09:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:09:10,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 273 [2022-11-21 16:09:10,590 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) [2022-11-21 16:09:10,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:09:10,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 273 [2022-11-21 16:09:10,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand