./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:11:48,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:11:48,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:11:48,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:11:48,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:11:48,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:11:48,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:11:48,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:11:48,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:11:48,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:11:48,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:11:48,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:11:48,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:11:48,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:11:48,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:11:48,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:11:48,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:11:48,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:11:48,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:11:48,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:11:48,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:11:48,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:11:48,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:11:48,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:11:48,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:11:48,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:11:48,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:11:48,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:11:48,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:11:48,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:11:48,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:11:48,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:11:48,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:11:48,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:11:48,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:11:48,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:11:48,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:11:48,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:11:48,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:11:48,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:11:48,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:11:48,776 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:11:48,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:11:48,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:11:48,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:11:48,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:11:48,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:11:48,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:11:48,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:11:48,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:11:48,807 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:11:48,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:11:48,807 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:11:48,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:11:48,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:11:48,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:11:48,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:11:48,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:11:48,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:11:48,809 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:11:48,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:11:48,810 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:11:48,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:11:48,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:11:48,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:11:48,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:11:48,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:11:48,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:11:48,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:11:48,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:11:48,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:11:48,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:11:48,813 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:11:48,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:11:48,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:11:48,814 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_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d [2022-11-21 16:11:49,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:11:49,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:11:49,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:11:49,217 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:11:49,217 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:11:49,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2022-11-21 16:11:52,528 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:11:52,827 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:11:52,828 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2022-11-21 16:11:52,836 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/data/5c57fada0/ca52cca586da4da49e13cd059e337936/FLAGb111535ac [2022-11-21 16:11:52,855 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/data/5c57fada0/ca52cca586da4da49e13cd059e337936 [2022-11-21 16:11:52,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:11:52,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:11:52,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:11:52,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:11:52,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:11:52,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:11:52" (1/1) ... [2022-11-21 16:11:52,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425465a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:52, skipping insertion in model container [2022-11-21 16:11:52,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:11:52" (1/1) ... [2022-11-21 16:11:52,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:11:52,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:11:53,105 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-21 16:11:53,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:11:53,131 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:11:53,173 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2022-11-21 16:11:53,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:11:53,194 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:11:53,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53 WrapperNode [2022-11-21 16:11:53,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:11:53,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:11:53,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:11:53,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:11:53,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,266 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 456 [2022-11-21 16:11:53,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:11:53,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:11:53,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:11:53,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:11:53,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,313 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:11:53,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:11:53,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:11:53,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:11:53,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (1/1) ... [2022-11-21 16:11:53,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:11:53,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:53,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:11:53,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:11:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:11:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:11:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:11:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:11:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:11:53,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:11:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:11:53,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:11:53,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:11:53,482 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:11:53,482 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-21 16:11:53,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-21 16:11:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:11:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:11:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:11:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:11:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:11:53,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:11:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:11:53,487 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:11:53,733 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:11:53,736 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:11:54,700 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:11:55,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:11:55,061 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-21 16:11:55,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:11:55 BoogieIcfgContainer [2022-11-21 16:11:55,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:11:55,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:11:55,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:11:55,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:11:55,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:11:52" (1/3) ... [2022-11-21 16:11:55,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4774ba92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:11:55, skipping insertion in model container [2022-11-21 16:11:55,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:11:53" (2/3) ... [2022-11-21 16:11:55,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4774ba92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:11:55, skipping insertion in model container [2022-11-21 16:11:55,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:11:55" (3/3) ... [2022-11-21 16:11:55,075 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2022-11-21 16:11:55,087 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:11:55,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:11:55,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:11:55,101 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:11:55,214 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 16:11:55,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 316 places, 328 transitions, 688 flow [2022-11-21 16:11:55,519 INFO L130 PetriNetUnfolder]: 25/324 cut-off events. [2022-11-21 16:11:55,520 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:11:55,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 324 events. 25/324 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 284. Up to 2 conditions per place. [2022-11-21 16:11:55,528 INFO L82 GeneralOperation]: Start removeDead. Operand has 316 places, 328 transitions, 688 flow [2022-11-21 16:11:55,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 311 transitions, 646 flow [2022-11-21 16:11:55,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:11:55,580 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;@660d1f56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:11:55,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:11:55,679 INFO L130 PetriNetUnfolder]: 25/310 cut-off events. [2022-11-21 16:11:55,679 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:11:55,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:11:55,681 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:55,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:11:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1823631829, now seen corresponding path program 1 times [2022-11-21 16:11:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:55,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536075780] [2022-11-21 16:11:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:55,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:56,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536075780] [2022-11-21 16:11:56,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536075780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:11:56,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:11:56,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:11:56,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986913473] [2022-11-21 16:11:56,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:11:56,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:11:56,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:11:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:11:56,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 328 [2022-11-21 16:11:56,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 311 transitions, 646 flow. Second operand has 2 states, 2 states have (on average 298.0) internal successors, (596), 2 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:56,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:11:56,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 328 [2022-11-21 16:11:56,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:11:56,604 INFO L130 PetriNetUnfolder]: 285/660 cut-off events. [2022-11-21 16:11:56,605 INFO L131 PetriNetUnfolder]: For 89/90 co-relation queries the response was YES. [2022-11-21 16:11:56,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 660 events. 285/660 cut-off events. For 89/90 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1584 event pairs, 147 based on Foata normal form. 147/776 useless extension candidates. Maximal degree in co-relation 831. Up to 387 conditions per place. [2022-11-21 16:11:56,618 INFO L137 encePairwiseOnDemand]: 311/328 looper letters, 20 selfloop transitions, 0 changer transitions 9/294 dead transitions. [2022-11-21 16:11:56,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 294 transitions, 652 flow [2022-11-21 16:11:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:11:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:11:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 617 transitions. [2022-11-21 16:11:56,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9405487804878049 [2022-11-21 16:11:56,646 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 617 transitions. [2022-11-21 16:11:56,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 617 transitions. [2022-11-21 16:11:56,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:11:56,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 617 transitions. [2022-11-21 16:11:56,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:56,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 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) [2022-11-21 16:11:56,674 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 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) [2022-11-21 16:11:56,677 INFO L175 Difference]: Start difference. First operand has 299 places, 311 transitions, 646 flow. Second operand 2 states and 617 transitions. [2022-11-21 16:11:56,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 294 transitions, 652 flow [2022-11-21 16:11:56,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 294 transitions, 636 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-21 16:11:56,698 INFO L231 Difference]: Finished difference. Result has 292 places, 285 transitions, 578 flow [2022-11-21 16:11:56,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=578, PETRI_PLACES=292, PETRI_TRANSITIONS=285} [2022-11-21 16:11:56,710 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -7 predicate places. [2022-11-21 16:11:56,710 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 285 transitions, 578 flow [2022-11-21 16:11:56,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 298.0) internal successors, (596), 2 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:56,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:11:56,712 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:56,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:11:56,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:11:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:56,714 INFO L85 PathProgramCache]: Analyzing trace with hash 17771237, now seen corresponding path program 1 times [2022-11-21 16:11:56,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:56,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798997260] [2022-11-21 16:11:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:56,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:57,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798997260] [2022-11-21 16:11:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798997260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:11:57,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:11:57,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:11:57,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935166445] [2022-11-21 16:11:57,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:11:57,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:11:57,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:11:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:11:57,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 328 [2022-11-21 16:11:57,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 285 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 252.2) internal successors, (1261), 5 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:57,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:11:57,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 328 [2022-11-21 16:11:57,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:11:58,432 INFO L130 PetriNetUnfolder]: 309/798 cut-off events. [2022-11-21 16:11:58,432 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-21 16:11:58,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 798 events. 309/798 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2540 event pairs, 125 based on Foata normal form. 1/746 useless extension candidates. Maximal degree in co-relation 1307. Up to 413 conditions per place. [2022-11-21 16:11:58,445 INFO L137 encePairwiseOnDemand]: 320/328 looper letters, 64 selfloop transitions, 5 changer transitions 4/300 dead transitions. [2022-11-21 16:11:58,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 300 transitions, 761 flow [2022-11-21 16:11:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:11:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:11:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1289 transitions. [2022-11-21 16:11:58,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7859756097560976 [2022-11-21 16:11:58,451 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1289 transitions. [2022-11-21 16:11:58,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1289 transitions. [2022-11-21 16:11:58,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:11:58,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1289 transitions. [2022-11-21 16:11:58,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 257.8) internal successors, (1289), 5 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:58,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:58,465 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:58,465 INFO L175 Difference]: Start difference. First operand has 292 places, 285 transitions, 578 flow. Second operand 5 states and 1289 transitions. [2022-11-21 16:11:58,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 300 transitions, 761 flow [2022-11-21 16:11:58,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 300 transitions, 761 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:11:58,478 INFO L231 Difference]: Finished difference. Result has 290 places, 289 transitions, 615 flow [2022-11-21 16:11:58,479 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=615, PETRI_PLACES=290, PETRI_TRANSITIONS=289} [2022-11-21 16:11:58,480 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -9 predicate places. [2022-11-21 16:11:58,480 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 289 transitions, 615 flow [2022-11-21 16:11:58,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.2) internal successors, (1261), 5 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:58,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:11:58,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:58,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:11:58,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:11:58,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:58,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1052605477, now seen corresponding path program 1 times [2022-11-21 16:11:58,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:58,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302527093] [2022-11-21 16:11:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:58,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:59,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:59,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302527093] [2022-11-21 16:11:59,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302527093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:11:59,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:11:59,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:11:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503912449] [2022-11-21 16:11:59,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:11:59,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:11:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:59,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:11:59,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:11:59,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 328 [2022-11-21 16:11:59,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 289 transitions, 615 flow. Second operand has 6 states, 6 states have (on average 247.33333333333334) internal successors, (1484), 6 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:59,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:11:59,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 328 [2022-11-21 16:11:59,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:11:59,622 INFO L130 PetriNetUnfolder]: 323/953 cut-off events. [2022-11-21 16:11:59,622 INFO L131 PetriNetUnfolder]: For 118/119 co-relation queries the response was YES. [2022-11-21 16:11:59,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 953 events. 323/953 cut-off events. For 118/119 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2941 event pairs, 148 based on Foata normal form. 36/945 useless extension candidates. Maximal degree in co-relation 1754. Up to 459 conditions per place. [2022-11-21 16:11:59,632 INFO L137 encePairwiseOnDemand]: 315/328 looper letters, 70 selfloop transitions, 8 changer transitions 49/342 dead transitions. [2022-11-21 16:11:59,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 342 transitions, 993 flow [2022-11-21 16:11:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:11:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:11:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2285 transitions. [2022-11-21 16:11:59,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7740514905149052 [2022-11-21 16:11:59,642 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2285 transitions. [2022-11-21 16:11:59,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2285 transitions. [2022-11-21 16:11:59,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:11:59,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2285 transitions. [2022-11-21 16:11:59,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 253.88888888888889) internal successors, (2285), 9 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:59,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:59,662 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:59,663 INFO L175 Difference]: Start difference. First operand has 290 places, 289 transitions, 615 flow. Second operand 9 states and 2285 transitions. [2022-11-21 16:11:59,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 342 transitions, 993 flow [2022-11-21 16:11:59,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 342 transitions, 982 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-21 16:11:59,674 INFO L231 Difference]: Finished difference. Result has 295 places, 290 transitions, 642 flow [2022-11-21 16:11:59,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=642, PETRI_PLACES=295, PETRI_TRANSITIONS=290} [2022-11-21 16:11:59,677 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -4 predicate places. [2022-11-21 16:11:59,677 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 290 transitions, 642 flow [2022-11-21 16:11:59,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 247.33333333333334) internal successors, (1484), 6 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:59,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:11:59,679 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:11:59,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:11:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash -27260212, now seen corresponding path program 1 times [2022-11-21 16:11:59,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:59,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452184427] [2022-11-21 16:11:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:12:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:00,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452184427] [2022-11-21 16:12:00,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452184427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:00,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:00,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:12:00,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820998077] [2022-11-21 16:12:00,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:00,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:12:00,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:00,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:12:00,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:12:00,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 328 [2022-11-21 16:12:00,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 290 transitions, 642 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:00,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:00,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 328 [2022-11-21 16:12:00,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:00,813 INFO L130 PetriNetUnfolder]: 347/866 cut-off events. [2022-11-21 16:12:00,814 INFO L131 PetriNetUnfolder]: For 262/263 co-relation queries the response was YES. [2022-11-21 16:12:00,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1775 conditions, 866 events. 347/866 cut-off events. For 262/263 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2831 event pairs, 65 based on Foata normal form. 23/855 useless extension candidates. Maximal degree in co-relation 1768. Up to 396 conditions per place. [2022-11-21 16:12:00,825 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 37 selfloop transitions, 6 changer transitions 0/302 dead transitions. [2022-11-21 16:12:00,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 302 transitions, 769 flow [2022-11-21 16:12:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:12:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:12:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1173 transitions. [2022-11-21 16:12:00,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8940548780487805 [2022-11-21 16:12:00,830 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1173 transitions. [2022-11-21 16:12:00,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1173 transitions. [2022-11-21 16:12:00,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:00,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1173 transitions. [2022-11-21 16:12:00,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:00,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:00,843 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:00,844 INFO L175 Difference]: Start difference. First operand has 295 places, 290 transitions, 642 flow. Second operand 4 states and 1173 transitions. [2022-11-21 16:12:00,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 302 transitions, 769 flow [2022-11-21 16:12:00,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 302 transitions, 755 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:12:00,857 INFO L231 Difference]: Finished difference. Result has 292 places, 290 transitions, 644 flow [2022-11-21 16:12:00,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=644, PETRI_PLACES=292, PETRI_TRANSITIONS=290} [2022-11-21 16:12:00,861 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -7 predicate places. [2022-11-21 16:12:00,862 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 290 transitions, 644 flow [2022-11-21 16:12:00,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:00,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:00,865 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:00,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:12:00,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash 897588564, now seen corresponding path program 1 times [2022-11-21 16:12:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454255502] [2022-11-21 16:12:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:00,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:12:01,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454255502] [2022-11-21 16:12:01,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454255502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:01,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:01,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:12:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008961604] [2022-11-21 16:12:01,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:01,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:12:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:12:01,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:12:01,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 328 [2022-11-21 16:12:01,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 290 transitions, 644 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:01,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:01,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 328 [2022-11-21 16:12:01,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:01,750 INFO L130 PetriNetUnfolder]: 326/837 cut-off events. [2022-11-21 16:12:01,751 INFO L131 PetriNetUnfolder]: For 315/316 co-relation queries the response was YES. [2022-11-21 16:12:01,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 837 events. 326/837 cut-off events. For 315/316 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2738 event pairs, 56 based on Foata normal form. 22/829 useless extension candidates. Maximal degree in co-relation 1760. Up to 397 conditions per place. [2022-11-21 16:12:01,760 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 37 selfloop transitions, 6 changer transitions 0/302 dead transitions. [2022-11-21 16:12:01,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 302 transitions, 773 flow [2022-11-21 16:12:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:12:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:12:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1174 transitions. [2022-11-21 16:12:01,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8948170731707317 [2022-11-21 16:12:01,765 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1174 transitions. [2022-11-21 16:12:01,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1174 transitions. [2022-11-21 16:12:01,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:01,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1174 transitions. [2022-11-21 16:12:01,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:01,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:01,774 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:01,774 INFO L175 Difference]: Start difference. First operand has 292 places, 290 transitions, 644 flow. Second operand 4 states and 1174 transitions. [2022-11-21 16:12:01,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 302 transitions, 773 flow [2022-11-21 16:12:01,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 302 transitions, 763 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 16:12:01,782 INFO L231 Difference]: Finished difference. Result has 294 places, 290 transitions, 650 flow [2022-11-21 16:12:01,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=650, PETRI_PLACES=294, PETRI_TRANSITIONS=290} [2022-11-21 16:12:01,784 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -5 predicate places. [2022-11-21 16:12:01,784 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 290 transitions, 650 flow [2022-11-21 16:12:01,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:01,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:01,786 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:01,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:12:01,786 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash 555867276, now seen corresponding path program 1 times [2022-11-21 16:12:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110935557] [2022-11-21 16:12:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:01,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:12:02,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:02,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110935557] [2022-11-21 16:12:02,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110935557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:02,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:02,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:12:02,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881162411] [2022-11-21 16:12:02,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:02,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:12:02,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:02,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:12:02,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:12:02,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 328 [2022-11-21 16:12:02,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 290 transitions, 650 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:02,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:02,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 328 [2022-11-21 16:12:02,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:02,710 INFO L130 PetriNetUnfolder]: 422/985 cut-off events. [2022-11-21 16:12:02,710 INFO L131 PetriNetUnfolder]: For 536/537 co-relation queries the response was YES. [2022-11-21 16:12:02,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2250 conditions, 985 events. 422/985 cut-off events. For 536/537 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3618 event pairs, 80 based on Foata normal form. 19/973 useless extension candidates. Maximal degree in co-relation 2241. Up to 403 conditions per place. [2022-11-21 16:12:02,721 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 35 selfloop transitions, 6 changer transitions 4/304 dead transitions. [2022-11-21 16:12:02,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 304 transitions, 787 flow [2022-11-21 16:12:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:12:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:12:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1178 transitions. [2022-11-21 16:12:02,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8978658536585366 [2022-11-21 16:12:02,725 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1178 transitions. [2022-11-21 16:12:02,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1178 transitions. [2022-11-21 16:12:02,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:02,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1178 transitions. [2022-11-21 16:12:02,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.5) internal successors, (1178), 4 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:02,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:02,733 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:02,734 INFO L175 Difference]: Start difference. First operand has 294 places, 290 transitions, 650 flow. Second operand 4 states and 1178 transitions. [2022-11-21 16:12:02,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 304 transitions, 787 flow [2022-11-21 16:12:02,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 304 transitions, 777 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 16:12:02,742 INFO L231 Difference]: Finished difference. Result has 296 places, 290 transitions, 656 flow [2022-11-21 16:12:02,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=656, PETRI_PLACES=296, PETRI_TRANSITIONS=290} [2022-11-21 16:12:02,743 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -3 predicate places. [2022-11-21 16:12:02,744 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 290 transitions, 656 flow [2022-11-21 16:12:02,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:02,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:02,745 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:02,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:12:02,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:02,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1724014262, now seen corresponding path program 1 times [2022-11-21 16:12:02,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:02,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146439818] [2022-11-21 16:12:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:02,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:12:03,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:03,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146439818] [2022-11-21 16:12:03,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146439818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:03,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:03,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:12:03,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630188651] [2022-11-21 16:12:03,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:03,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:12:03,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:12:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:12:03,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 328 [2022-11-21 16:12:03,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 290 transitions, 656 flow. Second operand has 6 states, 6 states have (on average 248.66666666666666) internal successors, (1492), 6 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:03,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:03,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 328 [2022-11-21 16:12:03,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:03,813 INFO L130 PetriNetUnfolder]: 547/1256 cut-off events. [2022-11-21 16:12:03,813 INFO L131 PetriNetUnfolder]: For 629/631 co-relation queries the response was YES. [2022-11-21 16:12:03,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1256 events. 547/1256 cut-off events. For 629/631 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4707 event pairs, 321 based on Foata normal form. 15/1230 useless extension candidates. Maximal degree in co-relation 3057. Up to 619 conditions per place. [2022-11-21 16:12:03,828 INFO L137 encePairwiseOnDemand]: 318/328 looper letters, 71 selfloop transitions, 8 changer transitions 43/337 dead transitions. [2022-11-21 16:12:03,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 337 transitions, 1024 flow [2022-11-21 16:12:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:12:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:12:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2278 transitions. [2022-11-21 16:12:03,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.771680216802168 [2022-11-21 16:12:03,836 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2278 transitions. [2022-11-21 16:12:03,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2278 transitions. [2022-11-21 16:12:03,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:03,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2278 transitions. [2022-11-21 16:12:03,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 253.11111111111111) internal successors, (2278), 9 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:03,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:03,854 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:03,854 INFO L175 Difference]: Start difference. First operand has 296 places, 290 transitions, 656 flow. Second operand 9 states and 2278 transitions. [2022-11-21 16:12:03,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 337 transitions, 1024 flow [2022-11-21 16:12:03,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 337 transitions, 1014 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 16:12:03,902 INFO L231 Difference]: Finished difference. Result has 304 places, 291 transitions, 674 flow [2022-11-21 16:12:03,902 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=674, PETRI_PLACES=304, PETRI_TRANSITIONS=291} [2022-11-21 16:12:03,907 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 5 predicate places. [2022-11-21 16:12:03,908 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 291 transitions, 674 flow [2022-11-21 16:12:03,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 248.66666666666666) internal successors, (1492), 6 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:03,909 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:03,909 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:03,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:12:03,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:03,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2049960207, now seen corresponding path program 1 times [2022-11-21 16:12:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:03,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546229568] [2022-11-21 16:12:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:03,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:12:04,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:04,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546229568] [2022-11-21 16:12:04,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546229568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:04,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:04,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:12:04,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911562285] [2022-11-21 16:12:04,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:04,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:12:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:04,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:12:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:12:04,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 328 [2022-11-21 16:12:04,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 291 transitions, 674 flow. Second operand has 6 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:04,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:04,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 328 [2022-11-21 16:12:04,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:04,871 INFO L130 PetriNetUnfolder]: 430/1051 cut-off events. [2022-11-21 16:12:04,871 INFO L131 PetriNetUnfolder]: For 544/546 co-relation queries the response was YES. [2022-11-21 16:12:04,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2510 conditions, 1051 events. 430/1051 cut-off events. For 544/546 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3660 event pairs, 248 based on Foata normal form. 5/1023 useless extension candidates. Maximal degree in co-relation 2498. Up to 607 conditions per place. [2022-11-21 16:12:04,882 INFO L137 encePairwiseOnDemand]: 318/328 looper letters, 72 selfloop transitions, 8 changer transitions 23/318 dead transitions. [2022-11-21 16:12:04,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 318 transitions, 948 flow [2022-11-21 16:12:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:12:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:12:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2258 transitions. [2022-11-21 16:12:04,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7649051490514905 [2022-11-21 16:12:04,891 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2258 transitions. [2022-11-21 16:12:04,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2258 transitions. [2022-11-21 16:12:04,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:04,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2258 transitions. [2022-11-21 16:12:04,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 250.88888888888889) internal successors, (2258), 9 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:04,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:04,906 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:04,906 INFO L175 Difference]: Start difference. First operand has 304 places, 291 transitions, 674 flow. Second operand 9 states and 2258 transitions. [2022-11-21 16:12:04,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 318 transitions, 948 flow [2022-11-21 16:12:04,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 318 transitions, 930 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-21 16:12:04,914 INFO L231 Difference]: Finished difference. Result has 306 places, 292 transitions, 684 flow [2022-11-21 16:12:04,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=684, PETRI_PLACES=306, PETRI_TRANSITIONS=292} [2022-11-21 16:12:04,919 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 7 predicate places. [2022-11-21 16:12:04,919 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 292 transitions, 684 flow [2022-11-21 16:12:04,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:04,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:04,937 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:04,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:12:04,938 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:04,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash 710426636, now seen corresponding path program 1 times [2022-11-21 16:12:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:04,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411528948] [2022-11-21 16:12:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:04,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:12:05,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411528948] [2022-11-21 16:12:05,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411528948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:05,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:05,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:12:05,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961392055] [2022-11-21 16:12:05,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:05,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:12:05,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:12:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:12:05,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 328 [2022-11-21 16:12:05,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 292 transitions, 684 flow. Second operand has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:05,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:05,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 328 [2022-11-21 16:12:05,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:05,935 INFO L130 PetriNetUnfolder]: 440/1036 cut-off events. [2022-11-21 16:12:05,936 INFO L131 PetriNetUnfolder]: For 541/543 co-relation queries the response was YES. [2022-11-21 16:12:05,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 1036 events. 440/1036 cut-off events. For 541/543 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3677 event pairs, 255 based on Foata normal form. 9/1011 useless extension candidates. Maximal degree in co-relation 2517. Up to 604 conditions per place. [2022-11-21 16:12:05,949 INFO L137 encePairwiseOnDemand]: 320/328 looper letters, 75 selfloop transitions, 6 changer transitions 14/310 dead transitions. [2022-11-21 16:12:05,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 310 transitions, 934 flow [2022-11-21 16:12:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:12:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:12:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1769 transitions. [2022-11-21 16:12:05,957 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7704703832752613 [2022-11-21 16:12:05,957 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1769 transitions. [2022-11-21 16:12:05,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1769 transitions. [2022-11-21 16:12:05,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:05,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1769 transitions. [2022-11-21 16:12:05,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 252.71428571428572) internal successors, (1769), 7 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:05,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 328.0) internal successors, (2624), 8 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:05,971 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 328.0) internal successors, (2624), 8 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:05,972 INFO L175 Difference]: Start difference. First operand has 306 places, 292 transitions, 684 flow. Second operand 7 states and 1769 transitions. [2022-11-21 16:12:05,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 310 transitions, 934 flow [2022-11-21 16:12:05,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 310 transitions, 914 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-21 16:12:05,982 INFO L231 Difference]: Finished difference. Result has 306 places, 293 transitions, 688 flow [2022-11-21 16:12:05,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=306, PETRI_TRANSITIONS=293} [2022-11-21 16:12:05,984 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 7 predicate places. [2022-11-21 16:12:05,984 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 293 transitions, 688 flow [2022-11-21 16:12:05,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:05,985 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:05,986 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:05,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:12:05,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:05,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1267001627, now seen corresponding path program 1 times [2022-11-21 16:12:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:05,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279452548] [2022-11-21 16:12:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:05,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:12:06,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279452548] [2022-11-21 16:12:06,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279452548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:06,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:06,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:12:06,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742557335] [2022-11-21 16:12:06,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:06,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:12:06,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:06,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:12:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:12:06,769 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 328 [2022-11-21 16:12:06,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 293 transitions, 688 flow. Second operand has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:06,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:06,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 328 [2022-11-21 16:12:06,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:07,032 INFO L130 PetriNetUnfolder]: 212/717 cut-off events. [2022-11-21 16:12:07,032 INFO L131 PetriNetUnfolder]: For 399/407 co-relation queries the response was YES. [2022-11-21 16:12:07,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 717 events. 212/717 cut-off events. For 399/407 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2050 event pairs, 95 based on Foata normal form. 4/683 useless extension candidates. Maximal degree in co-relation 1411. Up to 294 conditions per place. [2022-11-21 16:12:07,040 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 27 selfloop transitions, 2 changer transitions 4/298 dead transitions. [2022-11-21 16:12:07,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 298 transitions, 770 flow [2022-11-21 16:12:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:12:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:12:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2022-11-21 16:12:07,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9024390243902439 [2022-11-21 16:12:07,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2022-11-21 16:12:07,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2022-11-21 16:12:07,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:07,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2022-11-21 16:12:07,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:07,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:07,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:07,051 INFO L175 Difference]: Start difference. First operand has 306 places, 293 transitions, 688 flow. Second operand 3 states and 888 transitions. [2022-11-21 16:12:07,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 298 transitions, 770 flow [2022-11-21 16:12:07,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 298 transitions, 758 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-21 16:12:07,059 INFO L231 Difference]: Finished difference. Result has 303 places, 294 transitions, 690 flow [2022-11-21 16:12:07,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=690, PETRI_PLACES=303, PETRI_TRANSITIONS=294} [2022-11-21 16:12:07,062 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 4 predicate places. [2022-11-21 16:12:07,062 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 294 transitions, 690 flow [2022-11-21 16:12:07,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:07,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:07,063 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:07,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:12:07,064 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1765096063, now seen corresponding path program 1 times [2022-11-21 16:12:07,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:07,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328546541] [2022-11-21 16:12:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:07,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:12:07,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328546541] [2022-11-21 16:12:07,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328546541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:07,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064335794] [2022-11-21 16:12:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:07,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:08,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:08,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:08,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:12:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:12:08,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:12:09,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:12:09,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064335794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:09,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:09,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-11-21 16:12:09,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491926389] [2022-11-21 16:12:09,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:09,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:12:09,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:09,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:12:09,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:12:09,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 328 [2022-11-21 16:12:09,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 294 transitions, 690 flow. Second operand has 24 states, 24 states have (on average 234.91666666666666) internal successors, (5638), 24 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:09,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:09,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 328 [2022-11-21 16:12:09,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:12,338 INFO L130 PetriNetUnfolder]: 335/1560 cut-off events. [2022-11-21 16:12:12,339 INFO L131 PetriNetUnfolder]: For 815/823 co-relation queries the response was YES. [2022-11-21 16:12:12,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1560 events. 335/1560 cut-off events. For 815/823 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 6654 event pairs, 109 based on Foata normal form. 51/1551 useless extension candidates. Maximal degree in co-relation 3042. Up to 291 conditions per place. [2022-11-21 16:12:12,352 INFO L137 encePairwiseOnDemand]: 295/328 looper letters, 77 selfloop transitions, 30 changer transitions 197/507 dead transitions. [2022-11-21 16:12:12,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 507 transitions, 1965 flow [2022-11-21 16:12:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-21 16:12:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-21 16:12:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 12154 transitions. [2022-11-21 16:12:12,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.712593808630394 [2022-11-21 16:12:12,381 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 12154 transitions. [2022-11-21 16:12:12,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 12154 transitions. [2022-11-21 16:12:12,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:12,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 12154 transitions. [2022-11-21 16:12:12,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 233.73076923076923) internal successors, (12154), 52 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:12,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 328.0) internal successors, (17384), 53 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:12,451 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 328.0) internal successors, (17384), 53 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:12,451 INFO L175 Difference]: Start difference. First operand has 303 places, 294 transitions, 690 flow. Second operand 52 states and 12154 transitions. [2022-11-21 16:12:12,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 507 transitions, 1965 flow [2022-11-21 16:12:12,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 507 transitions, 1952 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-21 16:12:12,463 INFO L231 Difference]: Finished difference. Result has 374 places, 302 transitions, 844 flow [2022-11-21 16:12:12,464 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=844, PETRI_PLACES=374, PETRI_TRANSITIONS=302} [2022-11-21 16:12:12,465 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 75 predicate places. [2022-11-21 16:12:12,465 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 302 transitions, 844 flow [2022-11-21 16:12:12,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 234.91666666666666) internal successors, (5638), 24 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:12,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:12,468 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:12,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:12,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:12:12,676 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1025248033, now seen corresponding path program 2 times [2022-11-21 16:12:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:12,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899184950] [2022-11-21 16:12:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:12,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-21 16:12:13,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:13,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899184950] [2022-11-21 16:12:13,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899184950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:13,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:13,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:12:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730554781] [2022-11-21 16:12:13,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:13,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:12:13,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:12:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:12:13,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 328 [2022-11-21 16:12:13,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 302 transitions, 844 flow. Second operand has 5 states, 5 states have (on average 287.6) internal successors, (1438), 5 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:13,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:13,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 328 [2022-11-21 16:12:13,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:14,250 INFO L130 PetriNetUnfolder]: 588/1645 cut-off events. [2022-11-21 16:12:14,250 INFO L131 PetriNetUnfolder]: For 2622/2660 co-relation queries the response was YES. [2022-11-21 16:12:14,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4409 conditions, 1645 events. 588/1645 cut-off events. For 2622/2660 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8278 event pairs, 138 based on Foata normal form. 28/1563 useless extension candidates. Maximal degree in co-relation 4374. Up to 387 conditions per place. [2022-11-21 16:12:14,279 INFO L137 encePairwiseOnDemand]: 317/328 looper letters, 49 selfloop transitions, 16 changer transitions 0/335 dead transitions. [2022-11-21 16:12:14,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 335 transitions, 1148 flow [2022-11-21 16:12:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:12:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:12:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1474 transitions. [2022-11-21 16:12:14,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8987804878048781 [2022-11-21 16:12:14,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1474 transitions. [2022-11-21 16:12:14,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1474 transitions. [2022-11-21 16:12:14,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:14,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1474 transitions. [2022-11-21 16:12:14,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:14,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:14,292 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:14,293 INFO L175 Difference]: Start difference. First operand has 374 places, 302 transitions, 844 flow. Second operand 5 states and 1474 transitions. [2022-11-21 16:12:14,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 335 transitions, 1148 flow [2022-11-21 16:12:14,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 335 transitions, 1050 flow, removed 32 selfloop flow, removed 26 redundant places. [2022-11-21 16:12:14,305 INFO L231 Difference]: Finished difference. Result has 326 places, 311 transitions, 890 flow [2022-11-21 16:12:14,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=890, PETRI_PLACES=326, PETRI_TRANSITIONS=311} [2022-11-21 16:12:14,307 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 27 predicate places. [2022-11-21 16:12:14,308 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 311 transitions, 890 flow [2022-11-21 16:12:14,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 287.6) internal successors, (1438), 5 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:14,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:14,309 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:14,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:12:14,312 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash 182415363, now seen corresponding path program 1 times [2022-11-21 16:12:14,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:14,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376855786] [2022-11-21 16:12:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:12:15,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:15,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376855786] [2022-11-21 16:12:15,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376855786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955215885] [2022-11-21 16:12:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:15,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:15,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:15,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:12:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:15,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:12:15,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:12:16,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:12:17,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955215885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:17,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:17,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-11-21 16:12:17,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974536268] [2022-11-21 16:12:17,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:17,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:12:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:12:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:12:17,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 328 [2022-11-21 16:12:17,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 311 transitions, 890 flow. Second operand has 28 states, 28 states have (on average 238.60714285714286) internal successors, (6681), 28 states have internal predecessors, (6681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:17,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:17,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 328 [2022-11-21 16:12:17,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:18,887 INFO L130 PetriNetUnfolder]: 606/1935 cut-off events. [2022-11-21 16:12:18,887 INFO L131 PetriNetUnfolder]: For 3023/3051 co-relation queries the response was YES. [2022-11-21 16:12:18,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5204 conditions, 1935 events. 606/1935 cut-off events. For 3023/3051 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9432 event pairs, 296 based on Foata normal form. 9/1797 useless extension candidates. Maximal degree in co-relation 5179. Up to 865 conditions per place. [2022-11-21 16:12:18,918 INFO L137 encePairwiseOnDemand]: 298/328 looper letters, 83 selfloop transitions, 28 changer transitions 73/393 dead transitions. [2022-11-21 16:12:18,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 393 transitions, 1578 flow [2022-11-21 16:12:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:12:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-21 16:12:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5774 transitions. [2022-11-21 16:12:18,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7334857723577236 [2022-11-21 16:12:18,929 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5774 transitions. [2022-11-21 16:12:18,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5774 transitions. [2022-11-21 16:12:18,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:18,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5774 transitions. [2022-11-21 16:12:18,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 240.58333333333334) internal successors, (5774), 24 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:18,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 328.0) internal successors, (8200), 25 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:18,959 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 328.0) internal successors, (8200), 25 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:18,959 INFO L175 Difference]: Start difference. First operand has 326 places, 311 transitions, 890 flow. Second operand 24 states and 5774 transitions. [2022-11-21 16:12:18,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 393 transitions, 1578 flow [2022-11-21 16:12:18,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 393 transitions, 1528 flow, removed 23 selfloop flow, removed 1 redundant places. [2022-11-21 16:12:18,974 INFO L231 Difference]: Finished difference. Result has 357 places, 315 transitions, 982 flow [2022-11-21 16:12:18,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=982, PETRI_PLACES=357, PETRI_TRANSITIONS=315} [2022-11-21 16:12:18,975 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 58 predicate places. [2022-11-21 16:12:18,975 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 315 transitions, 982 flow [2022-11-21 16:12:18,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 238.60714285714286) internal successors, (6681), 28 states have internal predecessors, (6681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:18,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:18,978 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:18,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:19,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:12:19,186 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1975781468, now seen corresponding path program 2 times [2022-11-21 16:12:19,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:19,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199574485] [2022-11-21 16:12:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:19,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-21 16:12:19,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:19,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199574485] [2022-11-21 16:12:19,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199574485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:12:19,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:12:19,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:12:19,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619968174] [2022-11-21 16:12:19,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:12:19,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:12:19,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:19,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:12:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:12:19,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 328 [2022-11-21 16:12:19,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 315 transitions, 982 flow. Second operand has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:19,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:12:19,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 328 [2022-11-21 16:12:19,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:12:21,413 INFO L130 PetriNetUnfolder]: 1522/3939 cut-off events. [2022-11-21 16:12:21,413 INFO L131 PetriNetUnfolder]: For 6048/6098 co-relation queries the response was YES. [2022-11-21 16:12:21,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10971 conditions, 3939 events. 1522/3939 cut-off events. For 6048/6098 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 27325 event pairs, 275 based on Foata normal form. 79/3728 useless extension candidates. Maximal degree in co-relation 10936. Up to 813 conditions per place. [2022-11-21 16:12:21,510 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 84 selfloop transitions, 5 changer transitions 0/366 dead transitions. [2022-11-21 16:12:21,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 366 transitions, 1472 flow [2022-11-21 16:12:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:12:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:12:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1200 transitions. [2022-11-21 16:12:21,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9146341463414634 [2022-11-21 16:12:21,513 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1200 transitions. [2022-11-21 16:12:21,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1200 transitions. [2022-11-21 16:12:21,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:12:21,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1200 transitions. [2022-11-21 16:12:21,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:21,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:21,520 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:21,520 INFO L175 Difference]: Start difference. First operand has 357 places, 315 transitions, 982 flow. Second operand 4 states and 1200 transitions. [2022-11-21 16:12:21,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 366 transitions, 1472 flow [2022-11-21 16:12:21,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 366 transitions, 1358 flow, removed 36 selfloop flow, removed 15 redundant places. [2022-11-21 16:12:21,542 INFO L231 Difference]: Finished difference. Result has 339 places, 318 transitions, 930 flow [2022-11-21 16:12:21,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=930, PETRI_PLACES=339, PETRI_TRANSITIONS=318} [2022-11-21 16:12:21,544 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 40 predicate places. [2022-11-21 16:12:21,544 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 318 transitions, 930 flow [2022-11-21 16:12:21,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:21,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:12:21,545 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:21,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:12:21,546 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:12:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:21,547 INFO L85 PathProgramCache]: Analyzing trace with hash 98149072, now seen corresponding path program 1 times [2022-11-21 16:12:21,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:21,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102933804] [2022-11-21 16:12:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:21,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:54,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102933804] [2022-11-21 16:12:54,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102933804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:54,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681819797] [2022-11-21 16:12:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:54,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:54,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:54,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:54,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2150006a-2eb5-4ce6-a240-593f65f08092/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:12:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:54,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-21 16:12:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:06,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-21 16:13:07,101 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-11-21 16:13:11,859 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:13:11,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-21 16:13:13,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 16:13:17,225 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:13:18,142 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:13:18,964 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:13:19,701 INFO L350 Elim1Store]: Elim1 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 [2022-11-21 16:13:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:13:27,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:20,426 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:16:03,890 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:18:08,461 WARN L233 SmtUtils]: Spent 21.26s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:19:06,672 WARN L233 SmtUtils]: Spent 11.18s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:20:50,244 WARN L233 SmtUtils]: Spent 13.53s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:21:59,047 WARN L233 SmtUtils]: Spent 11.38s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:23:09,804 WARN L233 SmtUtils]: Spent 17.07s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:24:20,259 WARN L233 SmtUtils]: Spent 13.06s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:25:48,552 WARN L233 SmtUtils]: Spent 15.75s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)