./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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-5e519f3 [2022-11-02 20:04:25,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:04:25,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:04:25,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:04:25,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:04:25,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:04:25,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:04:25,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:04:25,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:04:25,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:04:25,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:04:25,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:04:25,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:04:25,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:04:25,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:04:25,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:04:25,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:04:25,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:04:25,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:04:25,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:04:25,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:04:25,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:04:25,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:04:25,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:04:25,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:04:25,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:04:25,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:04:25,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:04:25,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:04:25,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:04:25,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:04:25,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:04:25,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:04:25,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:04:25,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:04:25,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:04:25,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:04:25,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:04:25,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:04:25,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:04:25,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:04:25,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:04:25,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:04:25,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:04:25,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:04:25,642 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:04:25,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:04:25,643 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:04:25,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:04:25,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:04:25,644 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:04:25,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:04:25,646 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:04:25,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:04:25,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:04:25,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:04:25,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:04:25,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:04:25,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:04:25,648 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:04:25,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:04:25,649 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:04:25,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:04:25,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:04:25,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:04:25,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:04:25,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:04:25,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:04:25,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:04:25,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:04:25,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:04:25,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:04:25,654 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:04:25,655 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:04:25,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:04:25,655 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_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-02 20:04:26,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:04:26,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:04:26,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:04:26,058 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:04:26,059 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:04:26,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-02 20:04:26,184 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/data/bb0b8410b/a81c02dd54ff4e63b0791a40123cdbe2/FLAGfa3358b33 [2022-11-02 20:04:26,741 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:04:26,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-02 20:04:26,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/data/bb0b8410b/a81c02dd54ff4e63b0791a40123cdbe2/FLAGfa3358b33 [2022-11-02 20:04:27,080 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/data/bb0b8410b/a81c02dd54ff4e63b0791a40123cdbe2 [2022-11-02 20:04:27,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:04:27,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:04:27,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:04:27,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:04:27,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:04:27,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c92f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27, skipping insertion in model container [2022-11-02 20:04:27,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:04:27,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:04:27,526 WARN L230 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_c21c5e70-a935-4947-8421-1cb52f7dc8f8/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-02 20:04:27,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:04:27,567 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:04:27,621 WARN L230 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_c21c5e70-a935-4947-8421-1cb52f7dc8f8/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-02 20:04:27,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:04:27,651 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:04:27,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27 WrapperNode [2022-11-02 20:04:27,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:04:27,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:04:27,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:04:27,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:04:27,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,723 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-11-02 20:04:27,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:04:27,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:04:27,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:04:27,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:04:27,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,756 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:04:27,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:04:27,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:04:27,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:04:27,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (1/1) ... [2022-11-02 20:04:27,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:04:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:04:27,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:04:27,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:04:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:04:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:04:27,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:04:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:04:27,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:04:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:04:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:04:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:04:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:04:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:04:27,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:04:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:04:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:04:27,895 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:04:28,022 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:04:28,024 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:04:28,709 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:04:28,734 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:04:28,735 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:04:28,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:04:28 BoogieIcfgContainer [2022-11-02 20:04:28,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:04:28,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:04:28,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:04:28,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:04:28,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:04:27" (1/3) ... [2022-11-02 20:04:28,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdce7ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:04:28, skipping insertion in model container [2022-11-02 20:04:28,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:04:27" (2/3) ... [2022-11-02 20:04:28,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdce7ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:04:28, skipping insertion in model container [2022-11-02 20:04:28,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:04:28" (3/3) ... [2022-11-02 20:04:28,758 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-02 20:04:28,770 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:04:28,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:04:28,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:04:28,780 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:04:28,951 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:04:29,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 246 transitions, 508 flow [2022-11-02 20:04:29,185 INFO L130 PetriNetUnfolder]: 25/244 cut-off events. [2022-11-02 20:04:29,185 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:04:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 244 events. 25/244 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2022-11-02 20:04:29,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 246 transitions, 508 flow [2022-11-02 20:04:29,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 235 transitions, 482 flow [2022-11-02 20:04:29,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:04:29,220 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;@129a2255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:04:29,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:04:29,299 INFO L130 PetriNetUnfolder]: 25/234 cut-off events. [2022-11-02 20:04:29,299 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:04:29,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:29,300 INFO L208 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] [2022-11-02 20:04:29,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1223781903, now seen corresponding path program 1 times [2022-11-02 20:04:29,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:29,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268874934] [2022-11-02 20:04:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:29,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268874934] [2022-11-02 20:04:29,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268874934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:29,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:29,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:04:29,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450750906] [2022-11-02 20:04:29,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:29,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:04:29,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:04:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:04:29,915 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 246 [2022-11-02 20:04:29,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 233.0) internal successors, (466), 2 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:29,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:29,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 246 [2022-11-02 20:04:29,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:30,044 INFO L130 PetriNetUnfolder]: 14/224 cut-off events. [2022-11-02 20:04:30,050 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-02 20:04:30,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 224 events. 14/224 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 292 event pairs, 0 based on Foata normal form. 13/216 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2022-11-02 20:04:30,056 INFO L137 encePairwiseOnDemand]: 235/246 looper letters, 4 selfloop transitions, 0 changer transitions 7/224 dead transitions. [2022-11-02 20:04:30,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 224 transitions, 468 flow [2022-11-02 20:04:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:04:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:04:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2022-11-02 20:04:30,083 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9654471544715447 [2022-11-02 20:04:30,084 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2022-11-02 20:04:30,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2022-11-02 20:04:30,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:30,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2022-11-02 20:04:30,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,114 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,116 INFO L175 Difference]: Start difference. First operand has 217 places, 235 transitions, 482 flow. Second operand 2 states and 475 transitions. [2022-11-02 20:04:30,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 224 transitions, 468 flow [2022-11-02 20:04:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:04:30,133 INFO L231 Difference]: Finished difference. Result has 214 places, 217 transitions, 438 flow [2022-11-02 20:04:30,136 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=438, PETRI_PLACES=214, PETRI_TRANSITIONS=217} [2022-11-02 20:04:30,141 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, -3 predicate places. [2022-11-02 20:04:30,142 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 217 transitions, 438 flow [2022-11-02 20:04:30,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 233.0) internal successors, (466), 2 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:30,144 INFO L208 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] [2022-11-02 20:04:30,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:04:30,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1845329235, now seen corresponding path program 1 times [2022-11-02 20:04:30,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973354505] [2022-11-02 20:04:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:30,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:30,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973354505] [2022-11-02 20:04:30,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973354505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:30,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:30,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:04:30,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867669434] [2022-11-02 20:04:30,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:30,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:04:30,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:04:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:04:30,768 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2022-11-02 20:04:30,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 217 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:30,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2022-11-02 20:04:30,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:30,874 INFO L130 PetriNetUnfolder]: 25/303 cut-off events. [2022-11-02 20:04:30,874 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:04:30,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 303 events. 25/303 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 669 event pairs, 1 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 331. Up to 14 conditions per place. [2022-11-02 20:04:30,881 INFO L137 encePairwiseOnDemand]: 243/246 looper letters, 10 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2022-11-02 20:04:30,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 221 transitions, 473 flow [2022-11-02 20:04:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:04:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:04:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-11-02 20:04:30,886 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9363143631436315 [2022-11-02 20:04:30,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-11-02 20:04:30,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-11-02 20:04:30,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:30,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-11-02 20:04:30,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,899 INFO L175 Difference]: Start difference. First operand has 214 places, 217 transitions, 438 flow. Second operand 3 states and 691 transitions. [2022-11-02 20:04:30,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 221 transitions, 473 flow [2022-11-02 20:04:30,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 221 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:04:30,910 INFO L231 Difference]: Finished difference. Result has 210 places, 217 transitions, 446 flow [2022-11-02 20:04:30,911 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=210, PETRI_TRANSITIONS=217} [2022-11-02 20:04:30,912 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, -7 predicate places. [2022-11-02 20:04:30,912 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 446 flow [2022-11-02 20:04:30,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:30,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:30,914 INFO L208 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] [2022-11-02 20:04:30,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:04:30,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -167813377, now seen corresponding path program 1 times [2022-11-02 20:04:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:30,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305342439] [2022-11-02 20:04:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:31,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:31,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305342439] [2022-11-02 20:04:31,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305342439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:31,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:31,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:04:31,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876513476] [2022-11-02 20:04:31,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:31,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:04:31,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:31,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:04:31,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:04:31,145 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2022-11-02 20:04:31,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 217 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:31,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:31,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2022-11-02 20:04:31,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:31,233 INFO L130 PetriNetUnfolder]: 25/327 cut-off events. [2022-11-02 20:04:31,233 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-11-02 20:04:31,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 327 events. 25/327 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 730 event pairs, 2 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 367. Up to 22 conditions per place. [2022-11-02 20:04:31,236 INFO L137 encePairwiseOnDemand]: 243/246 looper letters, 9 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-11-02 20:04:31,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 220 transitions, 476 flow [2022-11-02 20:04:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:04:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:04:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2022-11-02 20:04:31,240 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-11-02 20:04:31,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2022-11-02 20:04:31,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2022-11-02 20:04:31,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:31,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2022-11-02 20:04:31,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:31,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:31,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:31,250 INFO L175 Difference]: Start difference. First operand has 210 places, 217 transitions, 446 flow. Second operand 3 states and 690 transitions. [2022-11-02 20:04:31,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 220 transitions, 476 flow [2022-11-02 20:04:31,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 220 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:04:31,257 INFO L231 Difference]: Finished difference. Result has 211 places, 217 transitions, 450 flow [2022-11-02 20:04:31,258 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=450, PETRI_PLACES=211, PETRI_TRANSITIONS=217} [2022-11-02 20:04:31,261 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, -6 predicate places. [2022-11-02 20:04:31,261 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 217 transitions, 450 flow [2022-11-02 20:04:31,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:31,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:31,263 INFO L208 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] [2022-11-02 20:04:31,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:04:31,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:31,266 INFO L85 PathProgramCache]: Analyzing trace with hash -379076605, now seen corresponding path program 1 times [2022-11-02 20:04:31,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:31,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469805631] [2022-11-02 20:04:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:31,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469805631] [2022-11-02 20:04:31,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469805631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:31,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:31,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076557834] [2022-11-02 20:04:31,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:31,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:31,824 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:31,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 217 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:31,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:31,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:31,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:32,356 INFO L130 PetriNetUnfolder]: 105/613 cut-off events. [2022-11-02 20:04:32,357 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-02 20:04:32,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 613 events. 105/613 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2700 event pairs, 35 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 914. Up to 188 conditions per place. [2022-11-02 20:04:32,365 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 77 selfloop transitions, 3 changer transitions 19/270 dead transitions. [2022-11-02 20:04:32,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 270 transitions, 761 flow [2022-11-02 20:04:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:04:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 20:04:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2453 transitions. [2022-11-02 20:04:32,373 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7670419011882427 [2022-11-02 20:04:32,373 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2453 transitions. [2022-11-02 20:04:32,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2453 transitions. [2022-11-02 20:04:32,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:32,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2453 transitions. [2022-11-02 20:04:32,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.69230769230768) internal successors, (2453), 13 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,399 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,399 INFO L175 Difference]: Start difference. First operand has 211 places, 217 transitions, 450 flow. Second operand 13 states and 2453 transitions. [2022-11-02 20:04:32,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 270 transitions, 761 flow [2022-11-02 20:04:32,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 270 transitions, 757 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:04:32,409 INFO L231 Difference]: Finished difference. Result has 232 places, 219 transitions, 489 flow [2022-11-02 20:04:32,411 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=489, PETRI_PLACES=232, PETRI_TRANSITIONS=219} [2022-11-02 20:04:32,413 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 15 predicate places. [2022-11-02 20:04:32,414 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 219 transitions, 489 flow [2022-11-02 20:04:32,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:32,424 INFO L208 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] [2022-11-02 20:04:32,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:04:32,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash -605981825, now seen corresponding path program 1 times [2022-11-02 20:04:32,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:32,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678814112] [2022-11-02 20:04:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:32,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:32,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:32,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678814112] [2022-11-02 20:04:32,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678814112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:32,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:32,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:04:32,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511718531] [2022-11-02 20:04:32,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:32,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:04:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:04:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:04:32,537 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-11-02 20:04:32,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 219 transitions, 489 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:32,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-11-02 20:04:32,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:32,745 INFO L130 PetriNetUnfolder]: 48/624 cut-off events. [2022-11-02 20:04:32,745 INFO L131 PetriNetUnfolder]: For 102/117 co-relation queries the response was YES. [2022-11-02 20:04:32,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 624 events. 48/624 cut-off events. For 102/117 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2878 event pairs, 19 based on Foata normal form. 0/575 useless extension candidates. Maximal degree in co-relation 858. Up to 61 conditions per place. [2022-11-02 20:04:32,751 INFO L137 encePairwiseOnDemand]: 242/246 looper letters, 19 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-11-02 20:04:32,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 224 transitions, 544 flow [2022-11-02 20:04:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:04:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:04:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-11-02 20:04:32,754 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2022-11-02 20:04:32,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-11-02 20:04:32,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-11-02 20:04:32,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:32,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-11-02 20:04:32,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,761 INFO L175 Difference]: Start difference. First operand has 232 places, 219 transitions, 489 flow. Second operand 3 states and 677 transitions. [2022-11-02 20:04:32,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 224 transitions, 544 flow [2022-11-02 20:04:32,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 224 transitions, 531 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-11-02 20:04:32,772 INFO L231 Difference]: Finished difference. Result has 221 places, 221 transitions, 496 flow [2022-11-02 20:04:32,772 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=496, PETRI_PLACES=221, PETRI_TRANSITIONS=221} [2022-11-02 20:04:32,773 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 4 predicate places. [2022-11-02 20:04:32,774 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 221 transitions, 496 flow [2022-11-02 20:04:32,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:32,775 INFO L208 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] [2022-11-02 20:04:32,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:04:32,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -973739483, now seen corresponding path program 1 times [2022-11-02 20:04:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:32,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746896460] [2022-11-02 20:04:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:32,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:32,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:32,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746896460] [2022-11-02 20:04:32,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746896460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:32,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:32,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:04:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509203909] [2022-11-02 20:04:32,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:32,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:04:32,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:04:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:04:32,863 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-11-02 20:04:32,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 221 transitions, 496 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:32,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:32,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-11-02 20:04:32,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:33,004 INFO L130 PetriNetUnfolder]: 42/547 cut-off events. [2022-11-02 20:04:33,004 INFO L131 PetriNetUnfolder]: For 71/75 co-relation queries the response was YES. [2022-11-02 20:04:33,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 547 events. 42/547 cut-off events. For 71/75 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2156 event pairs, 18 based on Foata normal form. 4/512 useless extension candidates. Maximal degree in co-relation 715. Up to 47 conditions per place. [2022-11-02 20:04:33,011 INFO L137 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 0/226 dead transitions. [2022-11-02 20:04:33,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 226 transitions, 559 flow [2022-11-02 20:04:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:04:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:04:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-11-02 20:04:33,014 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2022-11-02 20:04:33,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-11-02 20:04:33,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-11-02 20:04:33,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:33,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-11-02 20:04:33,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,019 INFO L175 Difference]: Start difference. First operand has 221 places, 221 transitions, 496 flow. Second operand 3 states and 677 transitions. [2022-11-02 20:04:33,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 226 transitions, 559 flow [2022-11-02 20:04:33,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 226 transitions, 557 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:04:33,030 INFO L231 Difference]: Finished difference. Result has 224 places, 223 transitions, 518 flow [2022-11-02 20:04:33,030 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=518, PETRI_PLACES=224, PETRI_TRANSITIONS=223} [2022-11-02 20:04:33,034 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 7 predicate places. [2022-11-02 20:04:33,034 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 223 transitions, 518 flow [2022-11-02 20:04:33,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:33,035 INFO L208 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] [2022-11-02 20:04:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:04:33,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1018961335, now seen corresponding path program 1 times [2022-11-02 20:04:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:33,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400371429] [2022-11-02 20:04:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:33,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400371429] [2022-11-02 20:04:33,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400371429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:33,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:33,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:04:33,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191248596] [2022-11-02 20:04:33,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:33,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:04:33,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:04:33,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:04:33,158 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-11-02 20:04:33,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 223 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:33,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-11-02 20:04:33,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:33,325 INFO L130 PetriNetUnfolder]: 46/649 cut-off events. [2022-11-02 20:04:33,325 INFO L131 PetriNetUnfolder]: For 90/91 co-relation queries the response was YES. [2022-11-02 20:04:33,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 649 events. 46/649 cut-off events. For 90/91 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2970 event pairs, 19 based on Foata normal form. 0/607 useless extension candidates. Maximal degree in co-relation 854. Up to 54 conditions per place. [2022-11-02 20:04:33,330 INFO L137 encePairwiseOnDemand]: 244/246 looper letters, 24 selfloop transitions, 1 changer transitions 0/228 dead transitions. [2022-11-02 20:04:33,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 228 transitions, 583 flow [2022-11-02 20:04:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:04:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:04:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2022-11-02 20:04:33,334 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9159891598915989 [2022-11-02 20:04:33,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2022-11-02 20:04:33,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2022-11-02 20:04:33,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:33,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2022-11-02 20:04:33,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,339 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,340 INFO L175 Difference]: Start difference. First operand has 224 places, 223 transitions, 518 flow. Second operand 3 states and 676 transitions. [2022-11-02 20:04:33,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 228 transitions, 583 flow [2022-11-02 20:04:33,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 228 transitions, 577 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-02 20:04:33,347 INFO L231 Difference]: Finished difference. Result has 226 places, 223 transitions, 517 flow [2022-11-02 20:04:33,348 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=517, PETRI_PLACES=226, PETRI_TRANSITIONS=223} [2022-11-02 20:04:33,349 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 9 predicate places. [2022-11-02 20:04:33,349 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 223 transitions, 517 flow [2022-11-02 20:04:33,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:33,350 INFO L208 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] [2022-11-02 20:04:33,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:04:33,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:33,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1685003057, now seen corresponding path program 2 times [2022-11-02 20:04:33,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:33,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675705308] [2022-11-02 20:04:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:33,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675705308] [2022-11-02 20:04:33,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675705308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:33,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:33,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:33,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218613716] [2022-11-02 20:04:33,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:33,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:33,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:33,772 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:33,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 223 transitions, 517 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:33,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:33,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:33,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:34,291 INFO L130 PetriNetUnfolder]: 92/776 cut-off events. [2022-11-02 20:04:34,291 INFO L131 PetriNetUnfolder]: For 156/159 co-relation queries the response was YES. [2022-11-02 20:04:34,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 776 events. 92/776 cut-off events. For 156/159 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4200 event pairs, 39 based on Foata normal form. 1/746 useless extension candidates. Maximal degree in co-relation 1293. Up to 216 conditions per place. [2022-11-02 20:04:34,298 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 78 selfloop transitions, 3 changer transitions 22/278 dead transitions. [2022-11-02 20:04:34,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 278 transitions, 922 flow [2022-11-02 20:04:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:04:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 20:04:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2449 transitions. [2022-11-02 20:04:34,305 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.765791119449656 [2022-11-02 20:04:34,306 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2449 transitions. [2022-11-02 20:04:34,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2449 transitions. [2022-11-02 20:04:34,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:34,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2449 transitions. [2022-11-02 20:04:34,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.3846153846154) internal successors, (2449), 13 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:34,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:34,323 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:34,323 INFO L175 Difference]: Start difference. First operand has 226 places, 223 transitions, 517 flow. Second operand 13 states and 2449 transitions. [2022-11-02 20:04:34,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 278 transitions, 922 flow [2022-11-02 20:04:34,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 278 transitions, 921 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:04:34,332 INFO L231 Difference]: Finished difference. Result has 248 places, 225 transitions, 563 flow [2022-11-02 20:04:34,333 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=563, PETRI_PLACES=248, PETRI_TRANSITIONS=225} [2022-11-02 20:04:34,337 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2022-11-02 20:04:34,337 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 225 transitions, 563 flow [2022-11-02 20:04:34,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:34,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:34,338 INFO L208 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] [2022-11-02 20:04:34,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:04:34,339 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1215411841, now seen corresponding path program 1 times [2022-11-02 20:04:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:34,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24894812] [2022-11-02 20:04:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:34,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:35,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:35,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24894812] [2022-11-02 20:04:35,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24894812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:35,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:35,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-02 20:04:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033643413] [2022-11-02 20:04:35,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:35,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:04:35,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:04:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:04:35,671 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-11-02 20:04:35,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 225 transitions, 563 flow. Second operand has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:35,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:35,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-11-02 20:04:35,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:38,244 INFO L130 PetriNetUnfolder]: 296/2579 cut-off events. [2022-11-02 20:04:38,244 INFO L131 PetriNetUnfolder]: For 955/988 co-relation queries the response was YES. [2022-11-02 20:04:38,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4304 conditions, 2579 events. 296/2579 cut-off events. For 955/988 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 22339 event pairs, 92 based on Foata normal form. 13/2401 useless extension candidates. Maximal degree in co-relation 4279. Up to 230 conditions per place. [2022-11-02 20:04:38,268 INFO L137 encePairwiseOnDemand]: 215/246 looper letters, 162 selfloop transitions, 51 changer transitions 13/381 dead transitions. [2022-11-02 20:04:38,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 1467 flow [2022-11-02 20:04:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:04:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-02 20:04:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4667 transitions. [2022-11-02 20:04:38,280 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6775551684088269 [2022-11-02 20:04:38,281 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4667 transitions. [2022-11-02 20:04:38,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4667 transitions. [2022-11-02 20:04:38,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:38,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4667 transitions. [2022-11-02 20:04:38,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 166.67857142857142) internal successors, (4667), 28 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:38,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:38,325 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:38,334 INFO L175 Difference]: Start difference. First operand has 248 places, 225 transitions, 563 flow. Second operand 28 states and 4667 transitions. [2022-11-02 20:04:38,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 1467 flow [2022-11-02 20:04:38,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 381 transitions, 1420 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-11-02 20:04:38,353 INFO L231 Difference]: Finished difference. Result has 273 places, 266 transitions, 933 flow [2022-11-02 20:04:38,354 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=933, PETRI_PLACES=273, PETRI_TRANSITIONS=266} [2022-11-02 20:04:38,355 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 56 predicate places. [2022-11-02 20:04:38,355 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 266 transitions, 933 flow [2022-11-02 20:04:38,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:38,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:38,358 INFO L208 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] [2022-11-02 20:04:38,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:04:38,358 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:38,359 INFO L85 PathProgramCache]: Analyzing trace with hash -982366631, now seen corresponding path program 1 times [2022-11-02 20:04:38,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:38,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069085463] [2022-11-02 20:04:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:38,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:38,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:38,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069085463] [2022-11-02 20:04:38,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069085463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:38,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:38,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:04:38,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751773365] [2022-11-02 20:04:38,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:38,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:04:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:04:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:04:38,509 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-11-02 20:04:38,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 266 transitions, 933 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:38,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:38,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-11-02 20:04:38,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:39,008 INFO L130 PetriNetUnfolder]: 159/1962 cut-off events. [2022-11-02 20:04:39,008 INFO L131 PetriNetUnfolder]: For 916/941 co-relation queries the response was YES. [2022-11-02 20:04:39,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 1962 events. 159/1962 cut-off events. For 916/941 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 15533 event pairs, 45 based on Foata normal form. 19/1878 useless extension candidates. Maximal degree in co-relation 3229. Up to 91 conditions per place. [2022-11-02 20:04:39,075 INFO L137 encePairwiseOnDemand]: 240/246 looper letters, 26 selfloop transitions, 4 changer transitions 0/276 dead transitions. [2022-11-02 20:04:39,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 276 transitions, 1025 flow [2022-11-02 20:04:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:04:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 20:04:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2022-11-02 20:04:39,080 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2022-11-02 20:04:39,080 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2022-11-02 20:04:39,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2022-11-02 20:04:39,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:39,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2022-11-02 20:04:39,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:39,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:39,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:39,087 INFO L175 Difference]: Start difference. First operand has 273 places, 266 transitions, 933 flow. Second operand 4 states and 902 transitions. [2022-11-02 20:04:39,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 276 transitions, 1025 flow [2022-11-02 20:04:39,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 276 transitions, 979 flow, removed 15 selfloop flow, removed 10 redundant places. [2022-11-02 20:04:39,109 INFO L231 Difference]: Finished difference. Result has 266 places, 268 transitions, 915 flow [2022-11-02 20:04:39,111 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=915, PETRI_PLACES=266, PETRI_TRANSITIONS=268} [2022-11-02 20:04:39,112 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2022-11-02 20:04:39,112 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 268 transitions, 915 flow [2022-11-02 20:04:39,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:39,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:39,113 INFO L208 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] [2022-11-02 20:04:39,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:04:39,114 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash -507518259, now seen corresponding path program 1 times [2022-11-02 20:04:39,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:39,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241541959] [2022-11-02 20:04:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:39,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:39,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:39,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241541959] [2022-11-02 20:04:39,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241541959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:39,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:39,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:39,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577444357] [2022-11-02 20:04:39,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:39,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:39,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:39,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:39,497 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:39,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 268 transitions, 915 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:39,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:39,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:39,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:40,321 INFO L130 PetriNetUnfolder]: 229/2099 cut-off events. [2022-11-02 20:04:40,322 INFO L131 PetriNetUnfolder]: For 1915/1972 co-relation queries the response was YES. [2022-11-02 20:04:40,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4394 conditions, 2099 events. 229/2099 cut-off events. For 1915/1972 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17248 event pairs, 57 based on Foata normal form. 3/2034 useless extension candidates. Maximal degree in co-relation 4361. Up to 571 conditions per place. [2022-11-02 20:04:40,342 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 109 selfloop transitions, 8 changer transitions 18/320 dead transitions. [2022-11-02 20:04:40,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 320 transitions, 1476 flow [2022-11-02 20:04:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:04:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 20:04:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2445 transitions. [2022-11-02 20:04:40,350 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7645403377110694 [2022-11-02 20:04:40,350 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2445 transitions. [2022-11-02 20:04:40,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2445 transitions. [2022-11-02 20:04:40,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:40,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2445 transitions. [2022-11-02 20:04:40,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.07692307692307) internal successors, (2445), 13 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:40,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:40,366 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:40,366 INFO L175 Difference]: Start difference. First operand has 266 places, 268 transitions, 915 flow. Second operand 13 states and 2445 transitions. [2022-11-02 20:04:40,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 320 transitions, 1476 flow [2022-11-02 20:04:40,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 320 transitions, 1472 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-02 20:04:40,391 INFO L231 Difference]: Finished difference. Result has 286 places, 268 transitions, 953 flow [2022-11-02 20:04:40,392 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=953, PETRI_PLACES=286, PETRI_TRANSITIONS=268} [2022-11-02 20:04:40,393 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 69 predicate places. [2022-11-02 20:04:40,393 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 268 transitions, 953 flow [2022-11-02 20:04:40,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:40,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:40,394 INFO L208 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] [2022-11-02 20:04:40,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:04:40,395 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1846078997, now seen corresponding path program 2 times [2022-11-02 20:04:40,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:40,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395252844] [2022-11-02 20:04:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:40,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:40,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395252844] [2022-11-02 20:04:40,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395252844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:40,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:40,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:04:40,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465582950] [2022-11-02 20:04:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:40,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:04:40,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:04:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:04:40,490 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-11-02 20:04:40,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 268 transitions, 953 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:40,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:40,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-11-02 20:04:40,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:40,993 INFO L130 PetriNetUnfolder]: 144/1845 cut-off events. [2022-11-02 20:04:40,993 INFO L131 PetriNetUnfolder]: For 995/1014 co-relation queries the response was YES. [2022-11-02 20:04:41,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3152 conditions, 1845 events. 144/1845 cut-off events. For 995/1014 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 14266 event pairs, 30 based on Foata normal form. 4/1758 useless extension candidates. Maximal degree in co-relation 3110. Up to 82 conditions per place. [2022-11-02 20:04:41,012 INFO L137 encePairwiseOnDemand]: 241/246 looper letters, 28 selfloop transitions, 4 changer transitions 0/278 dead transitions. [2022-11-02 20:04:41,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 278 transitions, 1053 flow [2022-11-02 20:04:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:04:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 20:04:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 901 transitions. [2022-11-02 20:04:41,015 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.915650406504065 [2022-11-02 20:04:41,016 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 901 transitions. [2022-11-02 20:04:41,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 901 transitions. [2022-11-02 20:04:41,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:41,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 901 transitions. [2022-11-02 20:04:41,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:41,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:41,024 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:41,024 INFO L175 Difference]: Start difference. First operand has 286 places, 268 transitions, 953 flow. Second operand 4 states and 901 transitions. [2022-11-02 20:04:41,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 278 transitions, 1053 flow [2022-11-02 20:04:41,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 278 transitions, 981 flow, removed 18 selfloop flow, removed 13 redundant places. [2022-11-02 20:04:41,045 INFO L231 Difference]: Finished difference. Result has 270 places, 270 transitions, 911 flow [2022-11-02 20:04:41,046 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=911, PETRI_PLACES=270, PETRI_TRANSITIONS=270} [2022-11-02 20:04:41,047 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 53 predicate places. [2022-11-02 20:04:41,047 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 270 transitions, 911 flow [2022-11-02 20:04:41,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:41,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:41,048 INFO L208 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] [2022-11-02 20:04:41,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:04:41,048 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1689246523, now seen corresponding path program 2 times [2022-11-02 20:04:41,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:41,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150724215] [2022-11-02 20:04:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:41,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:41,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:41,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150724215] [2022-11-02 20:04:41,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150724215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:41,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:41,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:41,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602848234] [2022-11-02 20:04:41,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:41,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:41,429 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:41,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 270 transitions, 911 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:41,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:41,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:41,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:42,051 INFO L130 PetriNetUnfolder]: 196/1948 cut-off events. [2022-11-02 20:04:42,052 INFO L131 PetriNetUnfolder]: For 1436/1544 co-relation queries the response was YES. [2022-11-02 20:04:42,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3919 conditions, 1948 events. 196/1948 cut-off events. For 1436/1544 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 15545 event pairs, 70 based on Foata normal form. 3/1874 useless extension candidates. Maximal degree in co-relation 3885. Up to 655 conditions per place. [2022-11-02 20:04:42,074 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 90 selfloop transitions, 10 changer transitions 18/305 dead transitions. [2022-11-02 20:04:42,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 305 transitions, 1364 flow [2022-11-02 20:04:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:04:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:04:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2063 transitions. [2022-11-02 20:04:42,083 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7623798965262379 [2022-11-02 20:04:42,083 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2063 transitions. [2022-11-02 20:04:42,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2063 transitions. [2022-11-02 20:04:42,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:42,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2063 transitions. [2022-11-02 20:04:42,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.54545454545453) internal successors, (2063), 11 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:42,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:42,099 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:42,100 INFO L175 Difference]: Start difference. First operand has 270 places, 270 transitions, 911 flow. Second operand 11 states and 2063 transitions. [2022-11-02 20:04:42,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 305 transitions, 1364 flow [2022-11-02 20:04:42,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 305 transitions, 1358 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-02 20:04:42,125 INFO L231 Difference]: Finished difference. Result has 287 places, 278 transitions, 1024 flow [2022-11-02 20:04:42,126 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1024, PETRI_PLACES=287, PETRI_TRANSITIONS=278} [2022-11-02 20:04:42,127 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 70 predicate places. [2022-11-02 20:04:42,127 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 278 transitions, 1024 flow [2022-11-02 20:04:42,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:42,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:42,129 INFO L208 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] [2022-11-02 20:04:42,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:04:42,129 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2024776925, now seen corresponding path program 3 times [2022-11-02 20:04:42,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:42,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110377888] [2022-11-02 20:04:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:42,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110377888] [2022-11-02 20:04:42,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110377888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:42,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:42,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:42,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985863235] [2022-11-02 20:04:42,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:42,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:42,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:42,519 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:42,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 278 transitions, 1024 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:42,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:42,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:42,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:43,253 INFO L130 PetriNetUnfolder]: 187/1944 cut-off events. [2022-11-02 20:04:43,253 INFO L131 PetriNetUnfolder]: For 1839/1941 co-relation queries the response was YES. [2022-11-02 20:04:43,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1944 events. 187/1944 cut-off events. For 1839/1941 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 15547 event pairs, 58 based on Foata normal form. 6/1878 useless extension candidates. Maximal degree in co-relation 4122. Up to 664 conditions per place. [2022-11-02 20:04:43,284 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 91 selfloop transitions, 10 changer transitions 21/309 dead transitions. [2022-11-02 20:04:43,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 309 transitions, 1525 flow [2022-11-02 20:04:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:04:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:04:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2061 transitions. [2022-11-02 20:04:43,290 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.761640798226164 [2022-11-02 20:04:43,291 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2061 transitions. [2022-11-02 20:04:43,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2061 transitions. [2022-11-02 20:04:43,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:43,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2061 transitions. [2022-11-02 20:04:43,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.36363636363637) internal successors, (2061), 11 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:43,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:43,306 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:43,307 INFO L175 Difference]: Start difference. First operand has 287 places, 278 transitions, 1024 flow. Second operand 11 states and 2061 transitions. [2022-11-02 20:04:43,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 309 transitions, 1525 flow [2022-11-02 20:04:43,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 309 transitions, 1454 flow, removed 30 selfloop flow, removed 6 redundant places. [2022-11-02 20:04:43,336 INFO L231 Difference]: Finished difference. Result has 294 places, 284 transitions, 1099 flow [2022-11-02 20:04:43,337 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1099, PETRI_PLACES=294, PETRI_TRANSITIONS=284} [2022-11-02 20:04:43,338 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 77 predicate places. [2022-11-02 20:04:43,338 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 284 transitions, 1099 flow [2022-11-02 20:04:43,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:43,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:43,339 INFO L208 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] [2022-11-02 20:04:43,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:04:43,340 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1285741767, now seen corresponding path program 4 times [2022-11-02 20:04:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:43,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176274085] [2022-11-02 20:04:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:43,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176274085] [2022-11-02 20:04:43,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176274085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:43,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:43,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584127899] [2022-11-02 20:04:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:43,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:43,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:43,641 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:43,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 284 transitions, 1099 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:43,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:43,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:43,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:44,388 INFO L130 PetriNetUnfolder]: 184/1909 cut-off events. [2022-11-02 20:04:44,388 INFO L131 PetriNetUnfolder]: For 1900/2047 co-relation queries the response was YES. [2022-11-02 20:04:44,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4087 conditions, 1909 events. 184/1909 cut-off events. For 1900/2047 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 15173 event pairs, 63 based on Foata normal form. 3/1838 useless extension candidates. Maximal degree in co-relation 4042. Up to 571 conditions per place. [2022-11-02 20:04:44,414 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 101 selfloop transitions, 12 changer transitions 23/323 dead transitions. [2022-11-02 20:04:44,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 323 transitions, 1591 flow [2022-11-02 20:04:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:04:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 20:04:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2440 transitions. [2022-11-02 20:04:44,420 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7629768605378362 [2022-11-02 20:04:44,420 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2440 transitions. [2022-11-02 20:04:44,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2440 transitions. [2022-11-02 20:04:44,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:44,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2440 transitions. [2022-11-02 20:04:44,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.69230769230768) internal successors, (2440), 13 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:44,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:44,434 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:44,435 INFO L175 Difference]: Start difference. First operand has 294 places, 284 transitions, 1099 flow. Second operand 13 states and 2440 transitions. [2022-11-02 20:04:44,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 323 transitions, 1591 flow [2022-11-02 20:04:44,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 323 transitions, 1493 flow, removed 42 selfloop flow, removed 7 redundant places. [2022-11-02 20:04:44,462 INFO L231 Difference]: Finished difference. Result has 303 places, 284 transitions, 1103 flow [2022-11-02 20:04:44,463 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1103, PETRI_PLACES=303, PETRI_TRANSITIONS=284} [2022-11-02 20:04:44,464 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 86 predicate places. [2022-11-02 20:04:44,464 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 284 transitions, 1103 flow [2022-11-02 20:04:44,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:44,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:44,465 INFO L208 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] [2022-11-02 20:04:44,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:04:44,466 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:44,467 INFO L85 PathProgramCache]: Analyzing trace with hash -80180503, now seen corresponding path program 5 times [2022-11-02 20:04:44,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:44,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653302568] [2022-11-02 20:04:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:44,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:44,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653302568] [2022-11-02 20:04:44,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653302568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:44,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:44,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676384279] [2022-11-02 20:04:44,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:44,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:44,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:44,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:44,780 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:44,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 284 transitions, 1103 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:44,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:44,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:44,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:45,418 INFO L130 PetriNetUnfolder]: 169/1896 cut-off events. [2022-11-02 20:04:45,419 INFO L131 PetriNetUnfolder]: For 1949/2063 co-relation queries the response was YES. [2022-11-02 20:04:45,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3982 conditions, 1896 events. 169/1896 cut-off events. For 1949/2063 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 15071 event pairs, 57 based on Foata normal form. 12/1837 useless extension candidates. Maximal degree in co-relation 3934. Up to 637 conditions per place. [2022-11-02 20:04:45,454 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 86 selfloop transitions, 3 changer transitions 23/299 dead transitions. [2022-11-02 20:04:45,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 299 transitions, 1426 flow [2022-11-02 20:04:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:04:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:04:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2240 transitions. [2022-11-02 20:04:45,465 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7588075880758808 [2022-11-02 20:04:45,468 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2240 transitions. [2022-11-02 20:04:45,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2240 transitions. [2022-11-02 20:04:45,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:45,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2240 transitions. [2022-11-02 20:04:45,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.66666666666666) internal successors, (2240), 12 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:45,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:45,491 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:45,491 INFO L175 Difference]: Start difference. First operand has 303 places, 284 transitions, 1103 flow. Second operand 12 states and 2240 transitions. [2022-11-02 20:04:45,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 299 transitions, 1426 flow [2022-11-02 20:04:45,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 299 transitions, 1339 flow, removed 23 selfloop flow, removed 12 redundant places. [2022-11-02 20:04:45,517 INFO L231 Difference]: Finished difference. Result has 298 places, 273 transitions, 952 flow [2022-11-02 20:04:45,518 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=952, PETRI_PLACES=298, PETRI_TRANSITIONS=273} [2022-11-02 20:04:45,519 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 81 predicate places. [2022-11-02 20:04:45,519 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 273 transitions, 952 flow [2022-11-02 20:04:45,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:45,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:45,521 INFO L208 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] [2022-11-02 20:04:45,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:04:45,521 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:45,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1340479329, now seen corresponding path program 6 times [2022-11-02 20:04:45,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:45,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493154259] [2022-11-02 20:04:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:45,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:45,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493154259] [2022-11-02 20:04:45,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493154259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:45,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:45,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049280247] [2022-11-02 20:04:45,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:45,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:45,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:45,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:45,824 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:45,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 273 transitions, 952 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:45,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:45,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:45,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:46,433 INFO L130 PetriNetUnfolder]: 148/1681 cut-off events. [2022-11-02 20:04:46,433 INFO L131 PetriNetUnfolder]: For 1121/1211 co-relation queries the response was YES. [2022-11-02 20:04:46,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 1681 events. 148/1681 cut-off events. For 1121/1211 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12714 event pairs, 54 based on Foata normal form. 3/1616 useless extension candidates. Maximal degree in co-relation 3272. Up to 550 conditions per place. [2022-11-02 20:04:46,463 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 2 changer transitions 24/282 dead transitions. [2022-11-02 20:04:46,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 282 transitions, 1186 flow [2022-11-02 20:04:46,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:04:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:04:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2235 transitions. [2022-11-02 20:04:46,469 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7571138211382114 [2022-11-02 20:04:46,469 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2235 transitions. [2022-11-02 20:04:46,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2235 transitions. [2022-11-02 20:04:46,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:46,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2235 transitions. [2022-11-02 20:04:46,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.25) internal successors, (2235), 12 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:46,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:46,486 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:46,487 INFO L175 Difference]: Start difference. First operand has 298 places, 273 transitions, 952 flow. Second operand 12 states and 2235 transitions. [2022-11-02 20:04:46,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 282 transitions, 1186 flow [2022-11-02 20:04:46,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 282 transitions, 1125 flow, removed 16 selfloop flow, removed 14 redundant places. [2022-11-02 20:04:46,507 INFO L231 Difference]: Finished difference. Result has 287 places, 258 transitions, 820 flow [2022-11-02 20:04:46,509 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=820, PETRI_PLACES=287, PETRI_TRANSITIONS=258} [2022-11-02 20:04:46,510 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 70 predicate places. [2022-11-02 20:04:46,510 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 258 transitions, 820 flow [2022-11-02 20:04:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:46,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:46,512 INFO L208 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] [2022-11-02 20:04:46,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:04:46,512 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:46,513 INFO L85 PathProgramCache]: Analyzing trace with hash 613945697, now seen corresponding path program 3 times [2022-11-02 20:04:46,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:46,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400263884] [2022-11-02 20:04:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:46,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:46,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:46,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400263884] [2022-11-02 20:04:46,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400263884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:46,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:46,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552201813] [2022-11-02 20:04:46,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:46,825 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:46,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 258 transitions, 820 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:46,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:46,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:46,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:47,443 INFO L130 PetriNetUnfolder]: 157/1718 cut-off events. [2022-11-02 20:04:47,445 INFO L131 PetriNetUnfolder]: For 975/1053 co-relation queries the response was YES. [2022-11-02 20:04:47,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3308 conditions, 1718 events. 157/1718 cut-off events. For 975/1053 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 13032 event pairs, 43 based on Foata normal form. 3/1654 useless extension candidates. Maximal degree in co-relation 3272. Up to 517 conditions per place. [2022-11-02 20:04:47,463 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 81 selfloop transitions, 10 changer transitions 22/297 dead transitions. [2022-11-02 20:04:47,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 297 transitions, 1241 flow [2022-11-02 20:04:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:04:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:04:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2066 transitions. [2022-11-02 20:04:47,468 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7634885439763488 [2022-11-02 20:04:47,469 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2066 transitions. [2022-11-02 20:04:47,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2066 transitions. [2022-11-02 20:04:47,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:47,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2066 transitions. [2022-11-02 20:04:47,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:47,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:47,482 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:47,482 INFO L175 Difference]: Start difference. First operand has 287 places, 258 transitions, 820 flow. Second operand 11 states and 2066 transitions. [2022-11-02 20:04:47,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 297 transitions, 1241 flow [2022-11-02 20:04:47,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 297 transitions, 1205 flow, removed 9 selfloop flow, removed 11 redundant places. [2022-11-02 20:04:47,496 INFO L231 Difference]: Finished difference. Result has 278 places, 266 transitions, 896 flow [2022-11-02 20:04:47,497 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=896, PETRI_PLACES=278, PETRI_TRANSITIONS=266} [2022-11-02 20:04:47,497 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 61 predicate places. [2022-11-02 20:04:47,498 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 266 transitions, 896 flow [2022-11-02 20:04:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:47,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:47,499 INFO L208 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] [2022-11-02 20:04:47,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:04:47,499 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 20451773, now seen corresponding path program 4 times [2022-11-02 20:04:47,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:47,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400246309] [2022-11-02 20:04:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:47,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:47,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:47,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400246309] [2022-11-02 20:04:47,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400246309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:47,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:47,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:47,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239329496] [2022-11-02 20:04:47,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:47,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:47,791 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:47,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 266 transitions, 896 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:47,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:47,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:47,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:48,407 INFO L130 PetriNetUnfolder]: 148/1714 cut-off events. [2022-11-02 20:04:48,408 INFO L131 PetriNetUnfolder]: For 1217/1304 co-relation queries the response was YES. [2022-11-02 20:04:48,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1714 events. 148/1714 cut-off events. For 1217/1304 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 13063 event pairs, 36 based on Foata normal form. 3/1655 useless extension candidates. Maximal degree in co-relation 3386. Up to 529 conditions per place. [2022-11-02 20:04:48,428 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 82 selfloop transitions, 10 changer transitions 25/301 dead transitions. [2022-11-02 20:04:48,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 301 transitions, 1357 flow [2022-11-02 20:04:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:04:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:04:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2062 transitions. [2022-11-02 20:04:48,434 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.762010347376201 [2022-11-02 20:04:48,434 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2062 transitions. [2022-11-02 20:04:48,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2062 transitions. [2022-11-02 20:04:48,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:48,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2062 transitions. [2022-11-02 20:04:48,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.45454545454547) internal successors, (2062), 11 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:48,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:48,448 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:48,448 INFO L175 Difference]: Start difference. First operand has 278 places, 266 transitions, 896 flow. Second operand 11 states and 2062 transitions. [2022-11-02 20:04:48,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 301 transitions, 1357 flow [2022-11-02 20:04:48,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 301 transitions, 1318 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:04:48,466 INFO L231 Difference]: Finished difference. Result has 285 places, 272 transitions, 989 flow [2022-11-02 20:04:48,467 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=989, PETRI_PLACES=285, PETRI_TRANSITIONS=272} [2022-11-02 20:04:48,467 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 68 predicate places. [2022-11-02 20:04:48,467 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 272 transitions, 989 flow [2022-11-02 20:04:48,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:48,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:48,469 INFO L208 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] [2022-11-02 20:04:48,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:04:48,470 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:48,470 INFO L85 PathProgramCache]: Analyzing trace with hash -85845529, now seen corresponding path program 5 times [2022-11-02 20:04:48,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:48,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427917172] [2022-11-02 20:04:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:48,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:48,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:48,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427917172] [2022-11-02 20:04:48,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427917172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:48,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:48,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:48,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732671636] [2022-11-02 20:04:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:48,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:48,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:48,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:48,765 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:48,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 272 transitions, 989 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:48,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:48,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:48,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:49,322 INFO L130 PetriNetUnfolder]: 136/1686 cut-off events. [2022-11-02 20:04:49,322 INFO L131 PetriNetUnfolder]: For 1335/1425 co-relation queries the response was YES. [2022-11-02 20:04:49,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1686 events. 136/1686 cut-off events. For 1335/1425 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12858 event pairs, 33 based on Foata normal form. 12/1639 useless extension candidates. Maximal degree in co-relation 3308. Up to 502 conditions per place. [2022-11-02 20:04:49,337 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 77 selfloop transitions, 3 changer transitions 27/291 dead transitions. [2022-11-02 20:04:49,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 291 transitions, 1297 flow [2022-11-02 20:04:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:04:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:04:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2241 transitions. [2022-11-02 20:04:49,344 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7591463414634146 [2022-11-02 20:04:49,344 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2241 transitions. [2022-11-02 20:04:49,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2241 transitions. [2022-11-02 20:04:49,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:49,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2241 transitions. [2022-11-02 20:04:49,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.75) internal successors, (2241), 12 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:49,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:49,358 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:49,358 INFO L175 Difference]: Start difference. First operand has 285 places, 272 transitions, 989 flow. Second operand 12 states and 2241 transitions. [2022-11-02 20:04:49,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 291 transitions, 1297 flow [2022-11-02 20:04:49,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 291 transitions, 1252 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-11-02 20:04:49,377 INFO L231 Difference]: Finished difference. Result has 289 places, 261 transitions, 863 flow [2022-11-02 20:04:49,378 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=863, PETRI_PLACES=289, PETRI_TRANSITIONS=261} [2022-11-02 20:04:49,379 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 72 predicate places. [2022-11-02 20:04:49,379 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 261 transitions, 863 flow [2022-11-02 20:04:49,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:49,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:49,380 INFO L208 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] [2022-11-02 20:04:49,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:04:49,381 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1216981687, now seen corresponding path program 6 times [2022-11-02 20:04:49,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:49,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390894020] [2022-11-02 20:04:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:49,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:49,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390894020] [2022-11-02 20:04:49,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390894020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:49,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:04:49,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:04:49,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61769013] [2022-11-02 20:04:49,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:49,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:04:49,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:49,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:04:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:04:49,659 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-11-02 20:04:49,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 261 transitions, 863 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:49,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:49,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-11-02 20:04:49,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:50,135 INFO L130 PetriNetUnfolder]: 115/1473 cut-off events. [2022-11-02 20:04:50,135 INFO L131 PetriNetUnfolder]: For 843/903 co-relation queries the response was YES. [2022-11-02 20:04:50,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2759 conditions, 1473 events. 115/1473 cut-off events. For 843/903 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10452 event pairs, 30 based on Foata normal form. 3/1420 useless extension candidates. Maximal degree in co-relation 2720. Up to 415 conditions per place. [2022-11-02 20:04:50,148 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 0 changer transitions 44/274 dead transitions. [2022-11-02 20:04:50,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 274 transitions, 1095 flow [2022-11-02 20:04:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:04:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:04:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2236 transitions. [2022-11-02 20:04:50,153 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7574525745257452 [2022-11-02 20:04:50,153 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2236 transitions. [2022-11-02 20:04:50,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2236 transitions. [2022-11-02 20:04:50,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:50,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2236 transitions. [2022-11-02 20:04:50,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.33333333333334) internal successors, (2236), 12 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:50,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:50,165 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:50,166 INFO L175 Difference]: Start difference. First operand has 289 places, 261 transitions, 863 flow. Second operand 12 states and 2236 transitions. [2022-11-02 20:04:50,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 274 transitions, 1095 flow [2022-11-02 20:04:50,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 274 transitions, 1034 flow, removed 16 selfloop flow, removed 14 redundant places. [2022-11-02 20:04:50,178 INFO L231 Difference]: Finished difference. Result has 277 places, 230 transitions, 631 flow [2022-11-02 20:04:50,178 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=631, PETRI_PLACES=277, PETRI_TRANSITIONS=230} [2022-11-02 20:04:50,179 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 60 predicate places. [2022-11-02 20:04:50,179 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 230 transitions, 631 flow [2022-11-02 20:04:50,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:50,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:50,180 INFO L208 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] [2022-11-02 20:04:50,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:04:50,181 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash 180327756, now seen corresponding path program 1 times [2022-11-02 20:04:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:50,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872134401] [2022-11-02 20:04:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:50,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:50,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872134401] [2022-11-02 20:04:50,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872134401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:04:50,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362518626] [2022-11-02 20:04:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:50,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:04:50,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:04:50,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:04:50,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:04:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:50,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:04:50,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:04:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:51,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:04:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:52,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362518626] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:04:52,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:04:52,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-11-02 20:04:52,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664169565] [2022-11-02 20:04:52,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:52,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:04:52,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:04:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:04:52,168 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-11-02 20:04:52,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 230 transitions, 631 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:52,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:52,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-11-02 20:04:52,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:53,411 INFO L130 PetriNetUnfolder]: 200/1818 cut-off events. [2022-11-02 20:04:53,412 INFO L131 PetriNetUnfolder]: For 653/666 co-relation queries the response was YES. [2022-11-02 20:04:53,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1818 events. 200/1818 cut-off events. For 653/666 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 13511 event pairs, 83 based on Foata normal form. 6/1684 useless extension candidates. Maximal degree in co-relation 3036. Up to 224 conditions per place. [2022-11-02 20:04:53,432 INFO L137 encePairwiseOnDemand]: 226/246 looper letters, 144 selfloop transitions, 22 changer transitions 7/312 dead transitions. [2022-11-02 20:04:53,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 312 transitions, 1225 flow [2022-11-02 20:04:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:04:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-02 20:04:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3340 transitions. [2022-11-02 20:04:53,440 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2022-11-02 20:04:53,441 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3340 transitions. [2022-11-02 20:04:53,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3340 transitions. [2022-11-02 20:04:53,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:53,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3340 transitions. [2022-11-02 20:04:53,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 167.0) internal successors, (3340), 20 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:53,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:53,462 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:53,463 INFO L175 Difference]: Start difference. First operand has 277 places, 230 transitions, 631 flow. Second operand 20 states and 3340 transitions. [2022-11-02 20:04:53,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 312 transitions, 1225 flow [2022-11-02 20:04:53,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 312 transitions, 1197 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-11-02 20:04:53,475 INFO L231 Difference]: Finished difference. Result has 266 places, 236 transitions, 725 flow [2022-11-02 20:04:53,475 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=725, PETRI_PLACES=266, PETRI_TRANSITIONS=236} [2022-11-02 20:04:53,476 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2022-11-02 20:04:53,476 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 236 transitions, 725 flow [2022-11-02 20:04:53,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:53,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:53,478 INFO L208 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] [2022-11-02 20:04:53,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:04:53,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:04:53,699 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash 659570956, now seen corresponding path program 2 times [2022-11-02 20:04:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:53,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663459522] [2022-11-02 20:04:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:53,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:54,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663459522] [2022-11-02 20:04:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663459522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:04:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260435933] [2022-11-02 20:04:54,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:04:54,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:04:54,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:04:54,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:04:54,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:04:54,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:04:54,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:04:54,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:04:54,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:04:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:04:55,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:04:55,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260435933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:04:55,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:04:55,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [15] total 28 [2022-11-02 20:04:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095567764] [2022-11-02 20:04:55,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:55,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:04:55,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:04:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:04:55,560 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-11-02 20:04:55,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 236 transitions, 725 flow. Second operand has 18 states, 18 states have (on average 162.22222222222223) internal successors, (2920), 18 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:55,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:55,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-11-02 20:04:55,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:04:57,614 INFO L130 PetriNetUnfolder]: 203/1907 cut-off events. [2022-11-02 20:04:57,614 INFO L131 PetriNetUnfolder]: For 1027/1047 co-relation queries the response was YES. [2022-11-02 20:04:57,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3332 conditions, 1907 events. 203/1907 cut-off events. For 1027/1047 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 14454 event pairs, 62 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 3297. Up to 213 conditions per place. [2022-11-02 20:04:57,637 INFO L137 encePairwiseOnDemand]: 218/246 looper letters, 115 selfloop transitions, 33 changer transitions 17/304 dead transitions. [2022-11-02 20:04:57,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 304 transitions, 1278 flow [2022-11-02 20:04:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:04:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-02 20:04:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4439 transitions. [2022-11-02 20:04:57,646 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6683227943390545 [2022-11-02 20:04:57,646 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4439 transitions. [2022-11-02 20:04:57,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4439 transitions. [2022-11-02 20:04:57,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:04:57,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4439 transitions. [2022-11-02 20:04:57,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 164.40740740740742) internal successors, (4439), 27 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:57,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 246.0) internal successors, (6888), 28 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:57,670 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 246.0) internal successors, (6888), 28 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:57,671 INFO L175 Difference]: Start difference. First operand has 266 places, 236 transitions, 725 flow. Second operand 27 states and 4439 transitions. [2022-11-02 20:04:57,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 304 transitions, 1278 flow [2022-11-02 20:04:57,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 304 transitions, 1223 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-11-02 20:04:57,684 INFO L231 Difference]: Finished difference. Result has 285 places, 251 transitions, 855 flow [2022-11-02 20:04:57,685 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=855, PETRI_PLACES=285, PETRI_TRANSITIONS=251} [2022-11-02 20:04:57,685 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 68 predicate places. [2022-11-02 20:04:57,686 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 251 transitions, 855 flow [2022-11-02 20:04:57,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 162.22222222222223) internal successors, (2920), 18 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:57,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:04:57,687 INFO L208 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] [2022-11-02 20:04:57,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:04:57,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:04:57,899 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:04:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:04:57,900 INFO L85 PathProgramCache]: Analyzing trace with hash 102062331, now seen corresponding path program 1 times [2022-11-02 20:04:57,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:04:57,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685963508] [2022-11-02 20:04:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:57,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:04:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:58,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:04:58,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685963508] [2022-11-02 20:04:58,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685963508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:04:58,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981438788] [2022-11-02 20:04:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:04:58,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:04:58,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:04:58,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:04:58,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:04:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:04:58,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:04:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:04:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:59,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:04:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:04:59,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981438788] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:04:59,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:04:59,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-11-02 20:04:59,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142754602] [2022-11-02 20:04:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:04:59,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:04:59,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:04:59,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:04:59,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:04:59,790 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-11-02 20:04:59,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 251 transitions, 855 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:04:59,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:04:59,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-11-02 20:04:59,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:01,089 INFO L130 PetriNetUnfolder]: 262/2374 cut-off events. [2022-11-02 20:05:01,090 INFO L131 PetriNetUnfolder]: For 1734/1757 co-relation queries the response was YES. [2022-11-02 20:05:01,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4399 conditions, 2374 events. 262/2374 cut-off events. For 1734/1757 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 19424 event pairs, 106 based on Foata normal form. 6/2186 useless extension candidates. Maximal degree in co-relation 4359. Up to 367 conditions per place. [2022-11-02 20:05:01,105 INFO L137 encePairwiseOnDemand]: 229/246 looper letters, 158 selfloop transitions, 23 changer transitions 11/331 dead transitions. [2022-11-02 20:05:01,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 331 transitions, 1557 flow [2022-11-02 20:05:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:05:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:05:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2022-11-02 20:05:01,111 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6836043360433605 [2022-11-02 20:05:01,112 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2022-11-02 20:05:01,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2022-11-02 20:05:01,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:01,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2022-11-02 20:05:01,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.16666666666666) internal successors, (3027), 18 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:01,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:01,127 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:01,127 INFO L175 Difference]: Start difference. First operand has 285 places, 251 transitions, 855 flow. Second operand 18 states and 3027 transitions. [2022-11-02 20:05:01,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 331 transitions, 1557 flow [2022-11-02 20:05:01,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 331 transitions, 1494 flow, removed 18 selfloop flow, removed 16 redundant places. [2022-11-02 20:05:01,145 INFO L231 Difference]: Finished difference. Result has 284 places, 255 transitions, 923 flow [2022-11-02 20:05:01,146 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=923, PETRI_PLACES=284, PETRI_TRANSITIONS=255} [2022-11-02 20:05:01,147 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 67 predicate places. [2022-11-02 20:05:01,147 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 255 transitions, 923 flow [2022-11-02 20:05:01,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:01,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:01,148 INFO L208 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] [2022-11-02 20:05:01,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:05:01,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:05:01,363 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2031402369, now seen corresponding path program 2 times [2022-11-02 20:05:01,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:01,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671979702] [2022-11-02 20:05:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:01,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671979702] [2022-11-02 20:05:01,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671979702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:05:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007193646] [2022-11-02 20:05:01,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:05:01,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:05:01,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:05:01,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:05:01,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:05:02,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:05:02,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:05:02,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:05:02,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:05:02,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:05:02,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007193646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:02,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:05:02,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 27 [2022-11-02 20:05:02,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554010091] [2022-11-02 20:05:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:02,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:05:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:05:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:05:02,733 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 246 [2022-11-02 20:05:02,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 255 transitions, 923 flow. Second operand has 14 states, 14 states have (on average 180.14285714285714) internal successors, (2522), 14 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:02,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:02,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 246 [2022-11-02 20:05:02,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:04,106 INFO L130 PetriNetUnfolder]: 244/2464 cut-off events. [2022-11-02 20:05:04,106 INFO L131 PetriNetUnfolder]: For 1965/2010 co-relation queries the response was YES. [2022-11-02 20:05:04,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4676 conditions, 2464 events. 244/2464 cut-off events. For 1965/2010 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 20297 event pairs, 101 based on Foata normal form. 18/2303 useless extension candidates. Maximal degree in co-relation 4632. Up to 447 conditions per place. [2022-11-02 20:05:04,134 INFO L137 encePairwiseOnDemand]: 224/246 looper letters, 62 selfloop transitions, 46 changer transitions 24/303 dead transitions. [2022-11-02 20:05:04,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 303 transitions, 1423 flow [2022-11-02 20:05:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:05:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:05:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3266 transitions. [2022-11-02 20:05:04,142 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7375790424570913 [2022-11-02 20:05:04,143 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3266 transitions. [2022-11-02 20:05:04,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3266 transitions. [2022-11-02 20:05:04,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:04,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3266 transitions. [2022-11-02 20:05:04,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 181.44444444444446) internal successors, (3266), 18 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:04,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:04,158 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:04,158 INFO L175 Difference]: Start difference. First operand has 284 places, 255 transitions, 923 flow. Second operand 18 states and 3266 transitions. [2022-11-02 20:05:04,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 303 transitions, 1423 flow [2022-11-02 20:05:04,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 303 transitions, 1366 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-11-02 20:05:04,183 INFO L231 Difference]: Finished difference. Result has 295 places, 267 transitions, 1073 flow [2022-11-02 20:05:04,184 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1073, PETRI_PLACES=295, PETRI_TRANSITIONS=267} [2022-11-02 20:05:04,185 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 78 predicate places. [2022-11-02 20:05:04,185 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 267 transitions, 1073 flow [2022-11-02 20:05:04,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 180.14285714285714) internal successors, (2522), 14 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:04,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:04,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:04,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:05:04,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:05:04,403 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:04,403 INFO L85 PathProgramCache]: Analyzing trace with hash 996887746, now seen corresponding path program 1 times [2022-11-02 20:05:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:04,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779430910] [2022-11-02 20:05:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:04,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:04,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779430910] [2022-11-02 20:05:04,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779430910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:04,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:04,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:05:04,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989776015] [2022-11-02 20:05:04,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:04,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:05:04,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:05:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:05:04,608 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-11-02 20:05:04,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 267 transitions, 1073 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:04,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:04,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-11-02 20:05:04,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:05,161 INFO L130 PetriNetUnfolder]: 318/1882 cut-off events. [2022-11-02 20:05:05,162 INFO L131 PetriNetUnfolder]: For 2536/2563 co-relation queries the response was YES. [2022-11-02 20:05:05,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3659 conditions, 1882 events. 318/1882 cut-off events. For 2536/2563 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 13277 event pairs, 143 based on Foata normal form. 1/1667 useless extension candidates. Maximal degree in co-relation 3613. Up to 430 conditions per place. [2022-11-02 20:05:05,182 INFO L137 encePairwiseOnDemand]: 235/246 looper letters, 69 selfloop transitions, 12 changer transitions 8/272 dead transitions. [2022-11-02 20:05:05,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 272 transitions, 1226 flow [2022-11-02 20:05:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:05:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:05:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1985 transitions. [2022-11-02 20:05:05,186 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2022-11-02 20:05:05,186 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1985 transitions. [2022-11-02 20:05:05,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1985 transitions. [2022-11-02 20:05:05,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:05,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1985 transitions. [2022-11-02 20:05:05,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.5) internal successors, (1985), 10 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,199 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,200 INFO L175 Difference]: Start difference. First operand has 295 places, 267 transitions, 1073 flow. Second operand 10 states and 1985 transitions. [2022-11-02 20:05:05,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 272 transitions, 1226 flow [2022-11-02 20:05:05,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 272 transitions, 1201 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-11-02 20:05:05,218 INFO L231 Difference]: Finished difference. Result has 284 places, 249 transitions, 932 flow [2022-11-02 20:05:05,219 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=932, PETRI_PLACES=284, PETRI_TRANSITIONS=249} [2022-11-02 20:05:05,219 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 67 predicate places. [2022-11-02 20:05:05,220 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 249 transitions, 932 flow [2022-11-02 20:05:05,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:05,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:05,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-02 20:05:05,223 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:05,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:05,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1215678520, now seen corresponding path program 1 times [2022-11-02 20:05:05,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:05,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147448341] [2022-11-02 20:05:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:05,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:05,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147448341] [2022-11-02 20:05:05,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147448341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:05,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:05,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:05:05,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929501576] [2022-11-02 20:05:05,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:05,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:05:05,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:05,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:05:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:05:05,393 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-11-02 20:05:05,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 249 transitions, 932 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:05,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-11-02 20:05:05,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:05,734 INFO L130 PetriNetUnfolder]: 182/1334 cut-off events. [2022-11-02 20:05:05,734 INFO L131 PetriNetUnfolder]: For 1886/1910 co-relation queries the response was YES. [2022-11-02 20:05:05,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2636 conditions, 1334 events. 182/1334 cut-off events. For 1886/1910 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 8369 event pairs, 120 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 2596. Up to 321 conditions per place. [2022-11-02 20:05:05,743 INFO L137 encePairwiseOnDemand]: 235/246 looper letters, 45 selfloop transitions, 8 changer transitions 32/255 dead transitions. [2022-11-02 20:05:05,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 255 transitions, 1080 flow [2022-11-02 20:05:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:05:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:05:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1980 transitions. [2022-11-02 20:05:05,747 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-11-02 20:05:05,747 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1980 transitions. [2022-11-02 20:05:05,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1980 transitions. [2022-11-02 20:05:05,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:05,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1980 transitions. [2022-11-02 20:05:05,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,755 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,755 INFO L175 Difference]: Start difference. First operand has 284 places, 249 transitions, 932 flow. Second operand 10 states and 1980 transitions. [2022-11-02 20:05:05,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 255 transitions, 1080 flow [2022-11-02 20:05:05,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 255 transitions, 1021 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-11-02 20:05:05,768 INFO L231 Difference]: Finished difference. Result has 281 places, 221 transitions, 689 flow [2022-11-02 20:05:05,769 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=689, PETRI_PLACES=281, PETRI_TRANSITIONS=221} [2022-11-02 20:05:05,769 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 64 predicate places. [2022-11-02 20:05:05,769 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 221 transitions, 689 flow [2022-11-02 20:05:05,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:05,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:05,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:05,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-02 20:05:05,771 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:05,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:05,771 INFO L85 PathProgramCache]: Analyzing trace with hash 762871754, now seen corresponding path program 1 times [2022-11-02 20:05:05,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:05,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697422179] [2022-11-02 20:05:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:05,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:06,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:06,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697422179] [2022-11-02 20:05:06,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697422179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:05:06,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89288774] [2022-11-02 20:05:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:06,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:05:06,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:05:06,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:05:06,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:05:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:05:06,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:06,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:05:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:05:07,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89288774] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:05:07,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:05:07,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-02 20:05:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427255312] [2022-11-02 20:05:07,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:07,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:05:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:05:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:05:07,110 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2022-11-02 20:05:07,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 221 transitions, 689 flow. Second operand has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:07,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:07,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2022-11-02 20:05:07,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:07,745 INFO L130 PetriNetUnfolder]: 168/1225 cut-off events. [2022-11-02 20:05:07,745 INFO L131 PetriNetUnfolder]: For 1253/1270 co-relation queries the response was YES. [2022-11-02 20:05:07,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 1225 events. 168/1225 cut-off events. For 1253/1270 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7855 event pairs, 73 based on Foata normal form. 6/1159 useless extension candidates. Maximal degree in co-relation 2240. Up to 107 conditions per place. [2022-11-02 20:05:07,755 INFO L137 encePairwiseOnDemand]: 232/246 looper letters, 72 selfloop transitions, 15 changer transitions 0/255 dead transitions. [2022-11-02 20:05:07,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 255 transitions, 1024 flow [2022-11-02 20:05:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:05:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:05:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2727 transitions. [2022-11-02 20:05:07,759 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7918118466898955 [2022-11-02 20:05:07,760 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2727 transitions. [2022-11-02 20:05:07,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2727 transitions. [2022-11-02 20:05:07,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:07,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2727 transitions. [2022-11-02 20:05:07,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.78571428571428) internal successors, (2727), 14 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:07,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:07,770 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:07,770 INFO L175 Difference]: Start difference. First operand has 281 places, 221 transitions, 689 flow. Second operand 14 states and 2727 transitions. [2022-11-02 20:05:07,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 255 transitions, 1024 flow [2022-11-02 20:05:07,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 255 transitions, 912 flow, removed 31 selfloop flow, removed 25 redundant places. [2022-11-02 20:05:07,781 INFO L231 Difference]: Finished difference. Result has 249 places, 225 transitions, 658 flow [2022-11-02 20:05:07,781 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=658, PETRI_PLACES=249, PETRI_TRANSITIONS=225} [2022-11-02 20:05:07,788 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2022-11-02 20:05:07,788 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 225 transitions, 658 flow [2022-11-02 20:05:07,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:07,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:07,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:07,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:05:08,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:05:08,007 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash -850506578, now seen corresponding path program 1 times [2022-11-02 20:05:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:08,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927296303] [2022-11-02 20:05:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:05:08,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:08,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927296303] [2022-11-02 20:05:08,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927296303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:08,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:08,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:05:08,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885845672] [2022-11-02 20:05:08,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:05:08,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:08,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:05:08,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:05:08,192 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-11-02 20:05:08,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 225 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:08,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-11-02 20:05:08,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:08,485 INFO L130 PetriNetUnfolder]: 148/967 cut-off events. [2022-11-02 20:05:08,485 INFO L131 PetriNetUnfolder]: For 559/607 co-relation queries the response was YES. [2022-11-02 20:05:08,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1729 conditions, 967 events. 148/967 cut-off events. For 559/607 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5140 event pairs, 67 based on Foata normal form. 28/917 useless extension candidates. Maximal degree in co-relation 1702. Up to 205 conditions per place. [2022-11-02 20:05:08,495 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 56 selfloop transitions, 8 changer transitions 6/242 dead transitions. [2022-11-02 20:05:08,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 242 transitions, 875 flow [2022-11-02 20:05:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:05:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:05:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1591 transitions. [2022-11-02 20:05:08,498 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8084349593495935 [2022-11-02 20:05:08,499 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1591 transitions. [2022-11-02 20:05:08,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1591 transitions. [2022-11-02 20:05:08,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:08,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1591 transitions. [2022-11-02 20:05:08,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.875) internal successors, (1591), 8 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,505 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,506 INFO L175 Difference]: Start difference. First operand has 249 places, 225 transitions, 658 flow. Second operand 8 states and 1591 transitions. [2022-11-02 20:05:08,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 242 transitions, 875 flow [2022-11-02 20:05:08,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 242 transitions, 853 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-11-02 20:05:08,515 INFO L231 Difference]: Finished difference. Result has 250 places, 225 transitions, 653 flow [2022-11-02 20:05:08,515 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=653, PETRI_PLACES=250, PETRI_TRANSITIONS=225} [2022-11-02 20:05:08,520 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 33 predicate places. [2022-11-02 20:05:08,520 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 225 transitions, 653 flow [2022-11-02 20:05:08,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:08,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:08,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-02 20:05:08,521 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash -387849798, now seen corresponding path program 1 times [2022-11-02 20:05:08,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:08,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816045482] [2022-11-02 20:05:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:08,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:05:08,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:08,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816045482] [2022-11-02 20:05:08,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816045482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:08,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:08,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:05:08,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592693859] [2022-11-02 20:05:08,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:08,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:05:08,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:08,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:05:08,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:05:08,701 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-11-02 20:05:08,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 225 transitions, 653 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:08,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-11-02 20:05:08,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:08,966 INFO L130 PetriNetUnfolder]: 93/708 cut-off events. [2022-11-02 20:05:08,966 INFO L131 PetriNetUnfolder]: For 457/460 co-relation queries the response was YES. [2022-11-02 20:05:08,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 708 events. 93/708 cut-off events. For 457/460 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3206 event pairs, 55 based on Foata normal form. 4/674 useless extension candidates. Maximal degree in co-relation 1294. Up to 171 conditions per place. [2022-11-02 20:05:08,973 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 46 selfloop transitions, 6 changer transitions 11/233 dead transitions. [2022-11-02 20:05:08,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 233 transitions, 806 flow [2022-11-02 20:05:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:05:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:05:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1586 transitions. [2022-11-02 20:05:08,977 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8058943089430894 [2022-11-02 20:05:08,977 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1586 transitions. [2022-11-02 20:05:08,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1586 transitions. [2022-11-02 20:05:08,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:08,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1586 transitions. [2022-11-02 20:05:08,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.25) internal successors, (1586), 8 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,984 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,984 INFO L175 Difference]: Start difference. First operand has 250 places, 225 transitions, 653 flow. Second operand 8 states and 1586 transitions. [2022-11-02 20:05:08,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 233 transitions, 806 flow [2022-11-02 20:05:08,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 233 transitions, 789 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-02 20:05:08,994 INFO L231 Difference]: Finished difference. Result has 249 places, 220 transitions, 620 flow [2022-11-02 20:05:08,994 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=620, PETRI_PLACES=249, PETRI_TRANSITIONS=220} [2022-11-02 20:05:08,995 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2022-11-02 20:05:08,995 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 220 transitions, 620 flow [2022-11-02 20:05:08,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:08,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:08,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:08,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-02 20:05:08,997 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash -657199781, now seen corresponding path program 1 times [2022-11-02 20:05:08,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:08,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457025090] [2022-11-02 20:05:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:08,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:05:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:09,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457025090] [2022-11-02 20:05:09,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457025090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:05:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806508314] [2022-11-02 20:05:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:09,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:05:09,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:05:09,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:05:09,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:05:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:09,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:05:09,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:05:09,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:05:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:05:10,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806508314] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:05:10,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:05:10,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-02 20:05:10,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414336071] [2022-11-02 20:05:10,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:10,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:05:10,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:05:10,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:05:10,445 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2022-11-02 20:05:10,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 220 transitions, 620 flow. Second operand has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:10,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:10,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2022-11-02 20:05:10,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:10,910 INFO L130 PetriNetUnfolder]: 115/797 cut-off events. [2022-11-02 20:05:10,910 INFO L131 PetriNetUnfolder]: For 368/399 co-relation queries the response was YES. [2022-11-02 20:05:10,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 797 events. 115/797 cut-off events. For 368/399 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3944 event pairs, 24 based on Foata normal form. 36/784 useless extension candidates. Maximal degree in co-relation 1376. Up to 139 conditions per place. [2022-11-02 20:05:10,918 INFO L137 encePairwiseOnDemand]: 232/246 looper letters, 48 selfloop transitions, 13 changer transitions 0/229 dead transitions. [2022-11-02 20:05:10,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 229 transitions, 788 flow [2022-11-02 20:05:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:05:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 20:05:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2512 transitions. [2022-11-02 20:05:10,923 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7854909318323953 [2022-11-02 20:05:10,923 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2512 transitions. [2022-11-02 20:05:10,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2512 transitions. [2022-11-02 20:05:10,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:10,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2512 transitions. [2022-11-02 20:05:10,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.23076923076923) internal successors, (2512), 13 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:10,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:10,934 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:10,934 INFO L175 Difference]: Start difference. First operand has 249 places, 220 transitions, 620 flow. Second operand 13 states and 2512 transitions. [2022-11-02 20:05:10,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 229 transitions, 788 flow [2022-11-02 20:05:10,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 229 transitions, 757 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-11-02 20:05:10,943 INFO L231 Difference]: Finished difference. Result has 249 places, 221 transitions, 635 flow [2022-11-02 20:05:10,943 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=635, PETRI_PLACES=249, PETRI_TRANSITIONS=221} [2022-11-02 20:05:10,944 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2022-11-02 20:05:10,944 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 221 transitions, 635 flow [2022-11-02 20:05:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:10,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:10,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:10,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:05:11,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-02 20:05:11,171 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1811343662, now seen corresponding path program 1 times [2022-11-02 20:05:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:11,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702433861] [2022-11-02 20:05:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:05:12,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:12,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702433861] [2022-11-02 20:05:12,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702433861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:05:12,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934905151] [2022-11-02 20:05:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:12,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:05:12,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:05:12,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:05:12,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:05:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:12,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:05:12,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:05:14,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:05:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:05:15,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934905151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:05:15,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:05:15,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2022-11-02 20:05:15,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396070302] [2022-11-02 20:05:15,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:05:15,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:05:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:05:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:05:15,845 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2022-11-02 20:05:15,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 221 transitions, 635 flow. Second operand has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:15,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:15,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2022-11-02 20:05:15,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:19,342 INFO L130 PetriNetUnfolder]: 477/2899 cut-off events. [2022-11-02 20:05:19,342 INFO L131 PetriNetUnfolder]: For 1359/1483 co-relation queries the response was YES. [2022-11-02 20:05:19,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5531 conditions, 2899 events. 477/2899 cut-off events. For 1359/1483 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 24736 event pairs, 200 based on Foata normal form. 123/2841 useless extension candidates. Maximal degree in co-relation 5505. Up to 317 conditions per place. [2022-11-02 20:05:19,369 INFO L137 encePairwiseOnDemand]: 222/246 looper letters, 255 selfloop transitions, 41 changer transitions 29/455 dead transitions. [2022-11-02 20:05:19,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 455 transitions, 2153 flow [2022-11-02 20:05:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:05:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-02 20:05:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5680 transitions. [2022-11-02 20:05:19,377 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6413730803974707 [2022-11-02 20:05:19,378 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5680 transitions. [2022-11-02 20:05:19,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5680 transitions. [2022-11-02 20:05:19,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:19,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5680 transitions. [2022-11-02 20:05:19,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 157.77777777777777) internal successors, (5680), 36 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:19,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:19,403 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:19,403 INFO L175 Difference]: Start difference. First operand has 249 places, 221 transitions, 635 flow. Second operand 36 states and 5680 transitions. [2022-11-02 20:05:19,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 455 transitions, 2153 flow [2022-11-02 20:05:19,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 455 transitions, 2109 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-02 20:05:19,420 INFO L231 Difference]: Finished difference. Result has 289 places, 248 transitions, 897 flow [2022-11-02 20:05:19,421 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=897, PETRI_PLACES=289, PETRI_TRANSITIONS=248} [2022-11-02 20:05:19,422 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 72 predicate places. [2022-11-02 20:05:19,422 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 248 transitions, 897 flow [2022-11-02 20:05:19,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:19,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:19,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:19,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:05:19,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:05:19,651 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:19,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1638493706, now seen corresponding path program 1 times [2022-11-02 20:05:19,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:19,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46772299] [2022-11-02 20:05:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:19,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:05:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46772299] [2022-11-02 20:05:20,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46772299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:05:20,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:05:20,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-02 20:05:20,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762170323] [2022-11-02 20:05:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:05:20,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:05:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:05:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:05:20,917 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-11-02 20:05:20,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 248 transitions, 897 flow. Second operand has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:20,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:20,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-11-02 20:05:20,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:27,564 INFO L130 PetriNetUnfolder]: 8611/24838 cut-off events. [2022-11-02 20:05:27,564 INFO L131 PetriNetUnfolder]: For 12915/13064 co-relation queries the response was YES. [2022-11-02 20:05:27,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48838 conditions, 24838 events. 8611/24838 cut-off events. For 12915/13064 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 289083 event pairs, 5019 based on Foata normal form. 12/23373 useless extension candidates. Maximal degree in co-relation 48796. Up to 5520 conditions per place. [2022-11-02 20:05:27,927 INFO L137 encePairwiseOnDemand]: 217/246 looper letters, 204 selfloop transitions, 42 changer transitions 0/424 dead transitions. [2022-11-02 20:05:27,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 424 transitions, 1964 flow [2022-11-02 20:05:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:05:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:05:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3814 transitions. [2022-11-02 20:05:27,942 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7382888114595432 [2022-11-02 20:05:27,943 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3814 transitions. [2022-11-02 20:05:27,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3814 transitions. [2022-11-02 20:05:27,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:27,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3814 transitions. [2022-11-02 20:05:27,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.61904761904762) internal successors, (3814), 21 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:27,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 246.0) internal successors, (5412), 22 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:27,964 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 246.0) internal successors, (5412), 22 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:27,964 INFO L175 Difference]: Start difference. First operand has 289 places, 248 transitions, 897 flow. Second operand 21 states and 3814 transitions. [2022-11-02 20:05:27,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 424 transitions, 1964 flow [2022-11-02 20:05:28,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 424 transitions, 1925 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-11-02 20:05:28,267 INFO L231 Difference]: Finished difference. Result has 303 places, 274 transitions, 1124 flow [2022-11-02 20:05:28,268 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1124, PETRI_PLACES=303, PETRI_TRANSITIONS=274} [2022-11-02 20:05:28,269 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 86 predicate places. [2022-11-02 20:05:28,269 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 274 transitions, 1124 flow [2022-11-02 20:05:28,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:28,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:28,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:28,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-02 20:05:28,271 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:28,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1195610168, now seen corresponding path program 1 times [2022-11-02 20:05:28,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:28,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235102751] [2022-11-02 20:05:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:28,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:05:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235102751] [2022-11-02 20:05:29,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235102751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:05:29,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618107221] [2022-11-02 20:05:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:29,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:05:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:05:29,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:05:29,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:05:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:29,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:05:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:30,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:05:30,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:05:30,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:05:31,337 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:05:31,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2022-11-02 20:05:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:05:31,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:05:31,843 WARN L833 $PredicateComparison]: unable to prove that (forall ((~get1~0.base Int) (v_ArrVal_564 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_564))) (let ((.cse1 (select .cse3 c_~get2~0.base)) (.cse0 (select .cse3 ~get1~0.base))) (or (< (select .cse0 c_~get1~0.offset) (+ (select .cse1 c_~get2~0.offset) 1)) (let ((.cse2 (* c_thread1Thread1of1ForFork0_~i~0 4))) (< (select .cse1 (+ c_~get2~0.offset .cse2)) (select .cse0 (+ c_~get1~0.offset .cse2)))))))) is different from false [2022-11-02 20:05:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:05:31,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618107221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:05:31,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:05:31,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 10] total 49 [2022-11-02 20:05:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342696542] [2022-11-02 20:05:31,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:05:31,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 20:05:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 20:05:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2055, Unknown=1, NotChecked=92, Total=2352 [2022-11-02 20:05:31,908 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2022-11-02 20:05:31,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 274 transitions, 1124 flow. Second operand has 49 states, 49 states have (on average 153.6122448979592) internal successors, (7527), 49 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:31,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:31,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2022-11-02 20:05:31,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:05:48,069 INFO L130 PetriNetUnfolder]: 17373/42872 cut-off events. [2022-11-02 20:05:48,069 INFO L131 PetriNetUnfolder]: For 33139/33338 co-relation queries the response was YES. [2022-11-02 20:05:48,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99167 conditions, 42872 events. 17373/42872 cut-off events. For 33139/33338 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 505938 event pairs, 6167 based on Foata normal form. 168/41639 useless extension candidates. Maximal degree in co-relation 99120. Up to 8279 conditions per place. [2022-11-02 20:05:48,704 INFO L137 encePairwiseOnDemand]: 207/246 looper letters, 391 selfloop transitions, 95 changer transitions 0/629 dead transitions. [2022-11-02 20:05:48,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 629 transitions, 3523 flow [2022-11-02 20:05:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 20:05:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-02 20:05:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5977 transitions. [2022-11-02 20:05:48,716 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6566688639859372 [2022-11-02 20:05:48,716 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5977 transitions. [2022-11-02 20:05:48,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5977 transitions. [2022-11-02 20:05:48,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:05:48,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5977 transitions. [2022-11-02 20:05:48,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 161.54054054054055) internal successors, (5977), 37 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:48,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 246.0) internal successors, (9348), 38 states have internal predecessors, (9348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:48,749 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 246.0) internal successors, (9348), 38 states have internal predecessors, (9348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:48,749 INFO L175 Difference]: Start difference. First operand has 303 places, 274 transitions, 1124 flow. Second operand 37 states and 5977 transitions. [2022-11-02 20:05:48,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 629 transitions, 3523 flow [2022-11-02 20:05:49,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 629 transitions, 3496 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-02 20:05:49,424 INFO L231 Difference]: Finished difference. Result has 351 places, 330 transitions, 1817 flow [2022-11-02 20:05:49,424 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1817, PETRI_PLACES=351, PETRI_TRANSITIONS=330} [2022-11-02 20:05:49,425 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 134 predicate places. [2022-11-02 20:05:49,425 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 330 transitions, 1817 flow [2022-11-02 20:05:49,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 153.6122448979592) internal successors, (7527), 49 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:49,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:05:49,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:05:49,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-02 20:05:49,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-02 20:05:49,628 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:05:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:05:49,629 INFO L85 PathProgramCache]: Analyzing trace with hash 612909616, now seen corresponding path program 2 times [2022-11-02 20:05:49,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:05:49,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210652414] [2022-11-02 20:05:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:05:49,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:05:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:05:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:05:50,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:05:50,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210652414] [2022-11-02 20:05:50,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210652414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:05:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924806874] [2022-11-02 20:05:50,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:05:50,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:05:50,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:05:50,671 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:05:50,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:05:51,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:05:51,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:05:51,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:05:51,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:05:51,475 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:05:51,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-02 20:05:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:05:51,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:05:51,847 INFO L356 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-02 20:05:51,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-11-02 20:05:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:05:51,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924806874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:05:51,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:05:51,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 9] total 29 [2022-11-02 20:05:51,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928267273] [2022-11-02 20:05:51,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:05:51,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:05:51,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:05:51,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:05:51,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:05:51,924 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-11-02 20:05:51,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 330 transitions, 1817 flow. Second operand has 29 states, 29 states have (on average 174.3448275862069) internal successors, (5056), 29 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:05:51,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:05:51,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-11-02 20:05:51,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:06:10,452 INFO L130 PetriNetUnfolder]: 21274/56756 cut-off events. [2022-11-02 20:06:10,453 INFO L131 PetriNetUnfolder]: For 122479/124067 co-relation queries the response was YES. [2022-11-02 20:06:11,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159371 conditions, 56756 events. 21274/56756 cut-off events. For 122479/124067 co-relation queries the response was YES. Maximal size of possible extension queue 2015. Compared 719682 event pairs, 1813 based on Foata normal form. 303/56279 useless extension candidates. Maximal degree in co-relation 159304. Up to 12670 conditions per place. [2022-11-02 20:06:11,345 INFO L137 encePairwiseOnDemand]: 212/246 looper letters, 347 selfloop transitions, 158 changer transitions 0/696 dead transitions. [2022-11-02 20:06:11,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 696 transitions, 5017 flow [2022-11-02 20:06:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:06:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-02 20:06:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5812 transitions. [2022-11-02 20:06:11,351 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7383130081300813 [2022-11-02 20:06:11,351 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5812 transitions. [2022-11-02 20:06:11,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5812 transitions. [2022-11-02 20:06:11,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:06:11,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5812 transitions. [2022-11-02 20:06:11,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 181.625) internal successors, (5812), 32 states have internal predecessors, (5812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:06:11,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 246.0) internal successors, (8118), 33 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:06:11,373 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 246.0) internal successors, (8118), 33 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:06:11,373 INFO L175 Difference]: Start difference. First operand has 351 places, 330 transitions, 1817 flow. Second operand 32 states and 5812 transitions. [2022-11-02 20:06:11,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 696 transitions, 5017 flow [2022-11-02 20:06:15,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 696 transitions, 4863 flow, removed 36 selfloop flow, removed 14 redundant places. [2022-11-02 20:06:15,392 INFO L231 Difference]: Finished difference. Result has 388 places, 427 transitions, 3201 flow [2022-11-02 20:06:15,393 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3201, PETRI_PLACES=388, PETRI_TRANSITIONS=427} [2022-11-02 20:06:15,394 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 171 predicate places. [2022-11-02 20:06:15,394 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 427 transitions, 3201 flow [2022-11-02 20:06:15,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 174.3448275862069) internal successors, (5056), 29 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:06:15,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:06:15,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:06:15,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:06:15,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c21c5e70-a935-4947-8421-1cb52f7dc8f8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:06:15,596 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:06:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:06:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash 788408658, now seen corresponding path program 1 times [2022-11-02 20:06:15,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:06:15,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998306990] [2022-11-02 20:06:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:06:15,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:06:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:06:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:06:16,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:06:16,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998306990] [2022-11-02 20:06:16,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998306990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:06:16,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:06:16,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-02 20:06:16,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79015999] [2022-11-02 20:06:16,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:06:16,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:06:16,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:06:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:06:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:06:16,688 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-11-02 20:06:16,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 427 transitions, 3201 flow. Second operand has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:06:16,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:06:16,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-11-02 20:06:16,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand